| 4-County Electric Power Association, Mississippi | USA |
| A&N Electric Cooperative (ANEC) | USA |
| ACS Billing Service | USA |
| AEP Appalachian Power | USA |
| AEP Energy Incorporated | USA |
| AEP Indiana Michigan Power | USA |
| AEP Kentucky Power | USA |
| AEP Ohio | USA |
| AEP Public Service Company of Oklahoma | USA |
| AEP Southwestern Electric Power Company | USA |
| AMS Billing Services, Florida | USA |
| AP Gas and Electric (APG&E) | USA |
| Access Energy Cooperative, Iowa | USA |
| Access Gas Services | CAN |
| Acton Water District, Massachusetts | USA |
| Adams County Regional Water District, Ohio | USA |
| Adams County Water Association, Mississippi | USA |
| Adams Electric Cooperative, Inc. | USA |
| Adams Rural Electric Cooperative | USA |
| Adams-Columbia Electric Cooperative, Wisconsin | USA |
| Agua Special Utility District, Texas | USA |
| Airgas | USA |
| Alabama Power | USA |
| Alabaster Water, Alabama | USA |
| Alameda County Water District, California | USA |
| Alameda Municipal Power, California | USA |
| Alaska Electric Light & Power Company (AEL&P) | USA |
| Alaska Power & Telephone Company (AP&T) | USA |
| Alaska Waste | USA |
| Albany Water Gas and Light Commission | USA |
| Albemarle County Service Authority | USA |
| Albemarle Electric Membership Corporation, North Carolina | USA |
| Alberta Municipal Services Corporation | CAN |
| Alcorn County Electric Power Association, Mississippi | USA |
| Alderwood Water & Waste Water District, Washington | USA |
| Alectra Utilities | CAN |
| Alexandria Renew Entreprises | USA |
| Alger Delta Electric | USA |
| Algoma Power Inc., Ontario | CAN |
| Algoma Utilities, Wisconsin | USA |
| Algona Municipal Utilities, Iowa | USA |
| Alliant Energy | USA |
| Alliant Gas / Pinnacle Propane, Arizona | USA |
| Aloha Water Company, Hawaii | USA |
| Alpena Power | USA |
| Alpha-Talbott Utility District, Tennessee | USA |
| AltaGas Utilities, Alberta | CAN |
| Altoona Water Authority, Pennsylvania | USA |
| Amador Water Agency, California | USA |
| Ambit Energy | USA |
| Ameren Illinois and Missouri | USA |
| AmeriGas | USA |
| AmeriPower | USA |
| American Conservation and Billing Solutions Inc, Colorado | USA |
| American Electric Power (AEP) | USA |
| American Light And Power, Texas | USA |
| American Power and Light LLC | USA |
| American Valley Community Services District, California | USA |
| American Water | USA |
| American Water - East Palo Alto, California | USA |
| Amicalola Electric Membership Corporation, Georgia | USA |
| Amigo Energy, Texas | USA |
| Ampra Energy, Texas | USA |
| Anaheim Public Utilities, California | USA |
| Anchorage Water And Wastewater Utility (AWWU), Alaska | USA |
| Animas Water Company | USA |
| Anne Arundel County, Department of Public Works, Maryland | USA |
| Anoka Municipal Utility, Minnesota | USA |
| Anza Electric Cooperative Inc, California | USA |
| Apex Billing Solutions, Georgia | USA |
| Apex Utilities Inc. | CAN |
| Appalachian Electric Cooperative (AEC), Tennessee | USA |
| Appalachian Natural Gas Distribution Company, Virginia | USA |
| Aqua Illinois | USA |
| Aqua Indiana | USA |
| Aqua North Carolina | USA |
| Aqua Ohio | USA |
| Aqua Pennsylvania | USA |
| Aqua Texas | USA |
| Aqua Virginia | USA |
| Aqua Water Supply Corporation, Texas | USA |
| Aquarion Water Company | USA |
| Aquatera | USA |
| Arapahoe County Water and Waste Water Authority (ACWWA), Colorado | USA |
| Arapahoe County Water and Wastewater Authority (ACWWA), Colorado | USA |
| Argyle Water Supply Corporation | USA |
| Arizona Public Service (APS) | USA |
| Arizona Submetering Solutions | USA |
| Arkansas Oklahoma Gas Corporation (AOG) | USA |
| Arkansas Valley Electric Cooperative | USA |
| Arlington County, Virginia | USA |
| Arrowhead Electric Cooperative, Inc. | USA |
| Artesian Resources | USA |
| Arthur-Shawanee Utility District, Tennessee | USA |
| Ashtabula County, Ohio | USA |
| Atascadero Mutual Water Company, California | USA |
| Atascadero Mutual Water Company, California | USA |
| Atchison-Holt Electric Cooperative, Missouri | USA |
| Atco Energy, Alberta | CAN |
| Athens Clarke County, Georgia | USA |
| Athens Utilities Board, Tennessee | USA |
| Atikokan Hydro Inc | CAN |
| Atlantic City Electric | USA |
| Atlantic Municipal Utilities, Iowa | USA |
| Atmos Energy | USA |
| Auburn Board of Public Works, Nebraska | USA |
| Audax Energia SA, Spain | USA |
| Augusta County Service Authority, Virginia | USA |
| Austell Natural Gas System, Georgia | USA |
| Austin Utilities, Minnesota | USA |
| Autoridad de acueductos y alcantarillados | USA |
| Avion Water Company | USA |
| Avista | USA |
| Avon Lake Regional Water, Ohio | USA |
| BBP Water Corporation, Indiana | USA |
| BC Hydro | CAN |
| BP Energy Company | USA |
| Bagdad-Garcon Point Water System Inc, Florida | USA |
| Baldwin EMC, Alabama | USA |
| Baltimore Gas & Electric (BGE) | USA |
| Bancroft Clover Water And Sanitation District, Colorado | USA |
| Bandera Electric Cooperative, Texas | USA |
| Bangor Water District, Maine | USA |
| Banks County Water System, Georgia | USA |
| Barker Cypress Municipal Utility District, Texas | USA |
| Barron Electric Cooperative, Wisconsin | USA |
| Barry Electric Cooperative | USA |
| Bartlett Electric Cooperative, Texas | USA |
| Barton County Electric Cooperative, Missouri | USA |
| Bartow County Water Department, Georgia | USA |
| Bay City Metering Company Inc | USA |
| Bay County Department of Water And Sewer, Michigan | USA |
| Bay County, Florida | USA |
| Bay Gas Storage | USA |
| Bay State Gas | USA |
| Bayfield Electric Cooperative | USA |
| Beaches Energy Services | USA |
| Bear Creek Water Association, Mississippi | USA |
| Bear Valley Electric Services, California | USA |
| Beartooth Electric Cooperative, Montana | USA |
| Beaufort Jasper Water and Sewer Authority (BJWSA) | USA |
| Beaumont-Cherry Valley Water District, California | USA |
| Beauregard Electric Cooperative | USA |
| Beaver City, Utah | USA |
| Beaver Falls Municipal Authority, Pennsylvania | USA |
| Bedford County Utility District, Tennessee | USA |
| Bedford Regional Water Authority, Virginia | USA |
| Bedford Rural Electric Cooperative | USA |
| Beech Island Community Water District | USA |
| Belfast Water District, Maine | USA |
| Bell-Milam-Falls Water Supply Corporation, Texas | USA |
| Bella Vista Property Owners Association, Arkansas | USA |
| Bella Vista Water District, California | USA |
| Bellflower-Somerset Mutual Water Company, California | USA |
| Belmont Light, Massachusetts | USA |
| Beltrami Electric Cooperative, Incorporated, Minnesota | USA |
| Benbrook Water Authority, Texas | USA |
| Benco Electric Cooperative, Minnesota | USA |
| Benton Gas Systems, Kentucky | USA |
| Benton PUD | USA |
| Benton Rural Electric Association | USA |
| Benton Utilities, Arkansas | USA |
| Berkeley County Public Service Water District, West Virginia | USA |
| Berkeley County Water and Sanitation (BCWS), South Carolina | USA |
| Berkeley Electric Cooperative | USA |
| Berkshire Gas | USA |
| Berryville, Arkansas | USA |
| Bessemer Utilities, Alabama | USA |
| Bethlehem Township, Pennsylvania | USA |
| Big Bend Electric Cooperative Inc, Washington | USA |
| Big Flat Electric Cooperative Inc, Montana | USA |
| Big Horn Rural Electric Company, Wyoming | USA |
| Big Oaks Municipal Utility District of Fort Bend County (MOC), Texas | USA |
| Big Sandy RECC, Kentucky | USA |
| Big Sky Gas, Montana | USA |
| Birmingham Water Works, Alabama | USA |
| Bissonnet Municipal Utility District, Texas | USA |
| Blachly Lane Electric Cooperative, Oregon | USA |
| Black Bayou Water Association, Mississippi | USA |
| Black Hills Energy | USA |
| Black River Electric Cooperative, Inc. | USA |
| Black River Electric Cooperative, Missouri | USA |
| Blairsville Municipal Authority, Pennsylvania | USA |
| Bloomfield Township, Michigan | USA |
| Blue Bonnet Electric Cooperative | USA |
| Blue Granite Water Company | USA |
| Blue Grass Energy Cooperative, Kentucky | USA |
| Blue Ridge Electric Co-op, South Carolina | USA |
| Blue Ridge Energy, North Carolina | USA |
| Blue Ridge Mountain Electric Membership Corporation, Georgia | USA |
| Bluestem Electric Cooperative Inc, Kansas | USA |
| Bluewater Power Distribution Corporation | CAN |
| Blytheville Water Works, Arkansas | USA |
| Board of Public Works, Cozad, Nebraska | USA |
| Board of Water Works of Pueblo, Colorado | USA |
| Bolivar Energy Authority, Tennessee | USA |
| Bona Vista Water Improvement, Utah | USA |
| Bonita Springs Utilities, Inc | USA |
| Boone County Water District, Kentucky | USA |
| Boone Electric Cooperative, Missouri | USA |
| Boone REMC, Indiana | USA |
| Borough Of Carlisle, Pennsylvania | USA |
| Borough Of Glassboro, New Jersey | USA |
| Borough of Ambler, Pennsylvania | USA |
| Borough of Charleroi Water Authority, Pennsylvania | USA |
| Borough of Englishtown, New Jersey | USA |
| Borough of Ephrata, Pennsylvania | USA |
| Borough of Freehold, New Jersey | USA |
| Borough of Kutztown, Pennsylvania | USA |
| Borough of Madison, New Jersey | USA |
| Borough of Pottstown, Pennsylvania | USA |
| Borough of Quakertown, Pennsylvania | USA |
| Borough of Tamaqua, Pennsylvania | USA |
| Borough of Waynesboro, Pennsylvania | USA |
| Boston Water and Sewer Commission, Massachusetts | USA |
| Boulder City, Nevada | USA |
| Bowie-Cass Electric Cooperative, Texas | USA |
| Bowling Green Municipal Utilities (BGMU), Kentucky | USA |
| Bozrah Light & Power, Connecticut | USA |
| Braintree Electric Light Department, Massachusetts | USA |
| Brantford Power, Ontario | CAN |
| Brazoria County MUD 25, Texas (Municipal Operations & Consulting, Inc.) | USA |
| Brazoria County Municipal Utility District 31, Texas | USA |
| Brick Township Municipal Utilities Authority, New Jersey | USA |
| Bridger Valley Electric Association, Wyoming | USA |
| Bridgestone Municipal Utility District, Texas | USA |
| Brigham City Corporation, Utah | USA |
| BrightRidge | USA |
| Brilliant Energy, Texas | USA |
| Bristol Tennessee Essential Services (BTES) | USA |
| Bristol Virginia Utilities Authority (BVU), Virginia | USA |
| Broad River Electric Cooperative Incorporated, South Carolina | USA |
| Broad River Water Authority, North Carolina | USA |
| Brodhead Water And Light, Wisconsin | USA |
| Broward County Water and Wastewater Services, Florida | USA |
| Brownsville Public Utilities Board, Texas | USA |
| Brownsville Utilities, Tennessee | USA |
| Bruce Power Direct, Ontario | CAN |
| Brunswick Electric Membership Corporation (BEMC), North Carolina | USA |
| Brunswick Glynn County, Georgia | USA |
| Brunswick Regional Water and Sewer, North Carolina | USA |
| Brushy Creek Municipal Utility District, Texas | USA |
| Bryan Texas Utilities (BTU), Texas | USA |
| Buckeye Rural Electric Cooperative(REC), Ohio | USA |
| Bucks County Water And Sewer Authority, Pennsylvania | USA |
| Buena Vista Charter Township, Michigan | USA |
| Burbank Water and Power | USA |
| Burke-Divide Electric Cooperative, North Dakota | USA |
| Burlington Electric Department, Vermont | USA |
| Burlington Hydro, Ontario | CAN |
| Burlington, VT Public Works, Vermont | USA |
| Burrtec | USA |
| Butler County Water and Sewer, Ohio | USA |
| Butler Public Power District, Nebraska | USA |
| Butler Rural Electric Cooperative, Inc., Ohio | USA |
| Butte Electric Cooperative Incorporated, South Dakota | USA |
| C and L Electric Coopearative Corporation, Arkansas | USA |
| CIMA Energy Solutions | USA |
| CIty of Fremont, Nebraska | USA |
| CNP Utility District, Texas (Municipal District Services) | USA |
| CPL Retail Energy | USA |
| CPS Energy | USA |
| Cabot Water Works, Arkansas | USA |
| Cairo Public Utility Company, Illinois | USA |
| Calaveras County Water District, California | USA |
| Caldwell County, North Carolina | USA |
| California City, California | USA |
| California Water Service | USA |
| Callaway Electric Cooperative, Missouri | USA |
| Calpine Energy Solutions | USA |
| Calumet City Water Department, Illinois | USA |
| Campus Energy | CAN |
| Camrosa Water District, California | USA |
| Canadian Niagara Power Inc., Ontario | USA |
| Canadian Valley Electric Cooperative, Oklahoma | USA |
| Caney Fork Electric Cooperative TN | USA |
| Canoochee Electric Membership Corporation (EMC) | USA |
| Canton Township, Michigan | USA |
| Cape Fear Public Utility Authority, North Carolina | USA |
| Cape Hatteras Electric Cooperative, North Carolina | USA |
| Capital Electric Cooperative, North Dakota | USA |
| Capital Region Water | USA |
| Carbon Power and Light Incorporated, Wyoming | USA |
| Cardinal Natural Gas | USA |
| Carmichael Water District, California | USA |
| Carpinteria Valley Water District, California | USA |
| Carroll County Electric Department, Tennessee | USA |
| Carroll Electric Membership Cooperative, Georgia | USA |
| Carroll White REMC, Indiana | USA |
| Carteret-Craven Electric Cooperative (CCEC), North Carolina | USA |
| Carthage Water and Electric Plant (CWEP), Missouri | USA |
| Cascade Natural Gas Corporation | USA |
| Casitas Municipal Water District, California | USA |
| Cass County Electric Cooperative, North Dakota | USA |
| Castle Pines North Metropolitan District, Colorado | USA |
| Castleway Properties LLC | USA |
| Catoosa Utility District Auth | USA |
| Cavallo Energy Texas | USA |
| Cedar City, Utah | USA |
| Cedar Falls Utilities (CFU), Iowa | USA |
| Cedarburg Light & Water Utility, Wisconsin | USA |
| Centennial Water and Sanitation District, Colorado | USA |
| Center Grove-Winchester Springs Utility District, Tennessee | USA |
| CenterPoint Energy | USA |
| Centerton Water and Sewer Department, Arkansas | USA |
| Central Alabama Electric Cooperative, Alabama | USA |
| Central Arkansas Water, Arkansas | USA |
| Central Electric Cooperative | USA |
| Central Electric Cooperative, Oklahoma | USA |
| Central Electric Cooperative, Oregon | USA |
| Central Electric Membership Corporation, North Carolina | USA |
| Central Florida Electric Cooperative, Inc. (CFEC) | USA |
| Central Georgia Electric Membership Corporation (EMC), Georgia | USA |
| Central Hudson | USA |
| Central Lincoln Public Utility District, Oregon | USA |
| Central Louisiana Electric Company Incorporated (CLECO), Louisiana | USA |
| Central Maine Power | USA |
| Central Missouri Electric Cooperative Inc, Missouri | USA |
| Central New Mexico Electric Cooperative (CNMEC) | USA |
| Central Texas Electric Cooperative Inc, Texas | USA |
| Central Texas Refuse (CTR), Texas | USA |
| Central Valley Electric Cooperative Inc., New Mexico | USA |
| Central Virginia Electric Cooperative | USA |
| Central Wisconsin Electric Cooperative, Wisconsin | USA |
| Centre Wellington Hydro Limited, Canada | CAN |
| Chambers County Municipal Utility District #1, Texas | USA |
| Champion Energy Services | USA |
| Champion Utility Billing Services | USA |
| Charles County, Maryland | USA |
| Charleston Water System, South Carolina | USA |
| Charlotte County Utilities, Florida | USA |
| Charter Township of Clinton Water & Sewer Division, Michigan | USA |
| Charter Township of Waterford, Michigan | USA |
| Charter Wood Municipal Utility District, Texas Municipal Operations And Consulting | USA |
| Chattanooga Gas | USA |
| Chelan County Public Utilities Department, Washington | USA |
| Chelford City Municipal Utility District, Texas | USA |
| Cherokee County Electric Cooperative Association, Texas | USA |
| Cherokee County Water & Sewerage Authority, Georgia | USA |
| Cherokee Electric Cooperative, Alabama | USA |
| Cherokee Metropolitan District, Colorado | USA |
| Cherry Creek Valley Water and Sanitation District, Colorado | USA |
| Cherryland Electric Cooperative | USA |
| Chesapeake Utilities Corporation | USA |
| Chester Water Authority (CWA), Pennsylvania | USA |
| Chesterfield County Utilities Department, Virginia | USA |
| Chevron Corporation, California | USA |
| Chicopee Electric Light, Massachusetts | USA |
| Chillicothe Municipal Utilities (CMU), Missouri | USA |
| Chimney Rock Public Power District, Nebraska | USA |
| Chippewa Valley Electric Cooperative, Wisconsin | USA |
| Choctaw Electric Cooperative (CEC) | USA |
| Choctawhatchee Electric Cooperative (CEC) | USA |
| Choptank Electric Cooperative | USA |
| Chugach Electric Association, Incorporated., Alaska | USA |
| Cimarron Municipal Utility District, Texas | USA |
| Cincinnati Bell | USA |
| Cinco MUD No. 2, Texas | USA |
| Cirro Energy | USA |
| Citizens Electric Corporation | USA |
| Citizens Energy Group | USA |
| Citizens Energy Group IN | USA |
| Citrus County Utilities, Florida | USA |
| Citrus Heights Water District, California | USA |
| City Corporation Russellville Water and Sewer System, Arkansas | USA |
| City Light, Gas and Water, Missouri | USA |
| City Of Albany Department of Water Department And Water Supply, New York | USA |
| City Of Altamonte Springs, Florida | USA |
| City Of Apopka, Florida | USA |
| City Of Arden Hills, Minnesota | USA |
| City Of Atlantic Beach, Florida | USA |
| City Of Beaver Dam, Wisconsin | USA |
| City Of Beaverton, Oregon | USA |
| City Of Beebe Water & Sewer, Arkansas | USA |
| City Of Bellingham, Washington | USA |
| City Of Biloxi, Mississippi | USA |
| City Of Brisbane, California | USA |
| City Of Chino Hills, California | USA |
| City Of Colleyville, Texas | USA |
| City Of Columbia City, Indiana | USA |
| City Of Coquitlam, Canada | CAN |
| City Of Crestview, Florida | USA |
| City Of Deer Park, Texas | USA |
| City Of Defiance, Ohio | USA |
| City Of Dekalb, Illinois | USA |
| City Of Ellensburg, Washington | USA |
| City Of Elmhurst, Illinois | USA |
| City Of Flint, Michigan | USA |
| City Of Folsom, California | USA |
| City Of Forney TX | USA |
| City Of Fort Pierce Utilities Authority (FPUA), FL | USA |
| City Of Fort Wayne, City Utilities, Indiana | USA |
| City Of Franklin, Kentucky | USA |
| City Of Franklin, Tennessee | USA |
| City Of Freeport, Illinois | USA |
| City Of Fridley, Minnesota | USA |
| City Of Frisco, Texas | USA |
| City Of Garfield Water Collector, New Jersey | USA |
| City Of Gladstone, Michigan | USA |
| City Of Gladstone, Missouri | USA |
| City Of Gresham, Oregon | USA |
| City Of Harrodsburg, Kentucky | USA |
| City Of Highland Illinois | USA |
| City Of Hudson Oaks, Texas | USA |
| City Of Kawartha Lakes, Ontario | CAN |
| City Of Keizer, Oregon | USA |
| City Of Kirksville, Missouri | USA |
| City Of La Habra, California | USA |
| City Of Lakeville, Minnesota | USA |
| City Of Ligonier, Indiana | USA |
| City Of Louisville, Colorado | USA |
| City Of Madison Heights, Michigan | USA |
| City Of Manassas, Virginia | USA |
| City Of Mansfield, Ohio | USA |
| City Of Marshfield, Missouri | USA |
| City Of Marysville, California | USA |
| City Of Napa CA | USA |
| City Of New Port, Washington | USA |
| City Of North St Paul, Minnesota | USA |
| City Of North Tonawanda, New York | USA |
| City Of Orange Cove, California | USA |
| City Of Parowan, Utah | USA |
| City Of Pasadena, Texas | USA |
| City Of Prescott, Arizona | USA |
| City Of Puyallup, Washington | USA |
| City Of Rome, Georgia | USA |
| City Of Rosemount, Minnesota | USA |
| City Of Rowlett, Utility billing, Texas | USA |
| City Of San Juan Capistrano, California | USA |
| City Of Sandersville, Georgia | USA |
| City Of Sarasota, Florida | USA |
| City Of Seaford, Delaware | USA |
| City Of Shreveport, Louisiana | USA |
| City Of Southgate, Michigan | USA |
| City Of Southlake, Texas | USA |
| City Of Suisun City, California | USA |
| City Of Tehachapi, California | USA |
| City Of Troy, Utility Billing Department, Missouri | USA |
| City Of Union Gap, Washington | USA |
| City Of Urbana, Ohio | USA |
| City Of Vacaville, California | USA |
| City Of Walker, Louisiana | USA |
| City Of Wauseon, Ohio | USA |
| City Of Weirton, West Virginia | USA |
| City Of Whitewater, Wisconsin | USA |
| City Of Wilmington, Ohio | USA |
| City Utilities of Springfield, Missouri | USA |
| City Water, Light and Power, Illinois | USA |
| City and County of Broomfield, Colorado | USA |
| City of Abbeville, Alabama | USA |
| City of Abbeville, South Carolina | USA |
| City of Aberdeen, Washington | USA |
| City of Acworth, Georgia | USA |
| City of Adamsville, Tennessee | USA |
| City of Airdrie, Alberta | CAN |
| City of Airway Heights, Washington | USA |
| City of Alamo Heights, Texas | USA |
| City of Alamogordo, New Mexico | USA |
| City of Albemarle, North Carolina | USA |
| City of Alcoa, Tennessee | USA |
| City of Alexander City, Alabama | USA |
| City of Algona, Washington | USA |
| City of Alhambra, California | USA |
| City of Allen, Texas | USA |
| City of Alliance, Nebraska | USA |
| City of Alliance, Ohio | USA |
| City of Altus, Oklahoma (Altus Power) | USA |
| City of Alvarado, Texas | USA |
| City of Alvin, Texas | USA |
| City of Amarillo, Texas | USA |
| City of American Canyon, California | USA |
| City of Americus, Georgia | USA |
| City of Anacortes, Washington | USA |
| City of Andalusia, Alabama | USA |
| City of Anderson, Indiana | USA |
| City of Anderson, South Carolina | USA |
| City of Angleton, Texas | USA |
| City of Ann Arbor, Michigan | USA |
| City of Anna, Texas | USA |
| City of Annapolis, Maryland | USA |
| City of Antigo, Wisconsin | USA |
| City of Antioch, California | USA |
| City of Apple Valley, Minnesota | USA |
| City of Arcata, California | USA |
| City of Archdale, North Carolina | USA |
| City of Arkansas City, Kansas | USA |
| City of Arlington, Texas | USA |
| City of Arlington, Washington | USA |
| City of Arvada, Colorado | USA |
| City of Asheboro, North Carolina | USA |
| City of Asheville, North Carolina | USA |
| City of Ashland, Kentucky | USA |
| City of Ashland, Ohio | USA |
| City of Ashland, Wisconsin | USA |
| City of Astoria, Oregon | USA |
| City of Athens, Alabama | USA |
| City of Athens, Ohio | USA |
| City of Atlanta Department of Watershed Management, Georgia | USA |
| City of Atwater, California | USA |
| City of Auburn, Alabama | USA |
| City of Auburn, Washington | USA |
| City of Auburndale, Florida | USA |
| City of Augusta, Georgia | USA |
| City of Aurora, Illinois | USA |
| City of Austell, Georgia | USA |
| City of Austin, Texas | USA |
| City of Avenal, California | USA |
| City of Avon, Ohio | USA |
| City of Avondale, Arizona | USA |
| City of Azle, Texas | USA |
| City of Aztec, New Mexico | USA |
| City of Azusa, California | USA |
| City of Bakersfield, California | USA |
| City of Balch Springs, Texas | USA |
| City of Baltimore, Maryland | USA |
| City of Banning, California | USA |
| City of Baraboo, Wisconsin | USA |
| City of Barberton, Ohio | USA |
| City of Bardstown, Kentucky | USA |
| City of Barnesville, Minnesota | USA |
| City of Barrie, Ontario | CAN |
| City of Barron, Wisconsin | USA |
| City of Bartlesville, Oklahoma | USA |
| City of Bartow, Florida | USA |
| City of Bastrop, Texas | USA |
| City of Batavia, IL | USA |
| City of Battle Creek, Michigan | USA |
| City of Battle Ground, Washington | USA |
| City of Beatrice, Nebraska | USA |
| City of Beaumont, Texas | USA |
| City of Bedford, Ohio | USA |
| City of Bedford, Texas | USA |
| City of Beeville, Texas | USA |
| City of Bellbrook, Ohio | USA |
| City of Bellevue, Iowa | USA |
| City of Bellevue, Washington | USA |
| City of Bellville, Texas | USA |
| City of Belmont, North Carolina | USA |
| City of Beloit, Wisconsin | USA |
| City of Belton, Missouri | USA |
| City of Bemidji, Minnesota | USA |
| City of Benicia, California | USA |
| City of Benson, Arizona | USA |
| City of Benson, Minnesota | USA |
| City of Bentonville, Arkansas | USA |
| City of Berea Municipal Utilities, Kentucky | USA |
| City of Bethany, Oklahoma | USA |
| City of Bethlehem, Pennsylvania | USA |
| City of Biddeford, Maine | USA |
| City of Big Bear Lake Department of Water, California | USA |
| City of Big Lake, Minnesota | USA |
| City of Bismarck, North Dakota | USA |
| City of Blaine, Minnesota | USA |
| City of Bloomington, Indiana | USA |
| City of Bloomington, Minnesota | USA |
| City of Boise, Idaho | USA |
| City of Boone, Iowa | USA |
| City of Bossier City, Louisiana | USA |
| City of Bothell, Washington | USA |
| City of Boulder, Colorado | USA |
| City of Bountiful City, Utah | USA |
| City of Bowling Green, Ohio | USA |
| City of Boynton Beach, Florida | USA |
| City of Bozeman, Montana | USA |
| City of Bradenton, Florida | USA |
| City of Brady, Texas | USA |
| City of Brantford, Ontario | CAN |
| City of Brawley, California | USA |
| City of Brazil, IN | USA |
| City of Brea, California | USA |
| City of Bremerton, Washington | USA |
| City of Brenham Public Utilities Department, Texas | USA |
| City of Brentwood, California | USA |
| City of Bridgeport, Texas | USA |
| City of Brighton, Colorado | USA |
| City of Bristol Water Department, Connecticut | USA |
| City of Broken Arrow, Oklahoma | USA |
| City of Brookings, Oregon | USA |
| City of Brooklyn Center, Minnesota | USA |
| City of Brooklyn Park, Minnesota | USA |
| City of Brownfield, Texas | USA |
| City of Brunswick, Maryland | USA |
| City of Bryan, Ohio | USA |
| City of Bryant, Arkansas | USA |
| City of Buckeye, Arizona | USA |
| City of Bucyrus, Ohio | USA |
| City of Buena Park, California | USA |
| City of Buffalo, Wyoming | USA |
| City of Buford, Georgia | USA |
| City of Bunnell, Florida | USA |
| City of Burleson, Texas | USA |
| City of Burley, Idaho | USA |
| City of Burlingame, California | USA |
| City of Burlington, North Carolina | USA |
| City of Burlington, Wisconsin | USA |
| City of Burnaby, British Columbia | CAN |
| City of Burnet, Texas | USA |
| City of Burnsville, Minnesota | USA |
| City of Bushnell, Illinois | USA |
| City of Butler, Georgia | USA |
| City of Caldwell, Idaho | USA |
| City of Caldwell, Texas | USA |
| City of Calera, Alabama | USA |
| City of Calexico, California | USA |
| City of Calhoun, Georgia | USA |
| City of Calistoga, California | USA |
| City of Callaway, Florida | USA |
| City of Camarillo, California | USA |
| City of Camas, Washington | USA |
| City of Cambridge, Maryland | USA |
| City of Cambridge, Massachusetts | USA |
| City of Cambridge, Minnesota | USA |
| City of Camden, New Jersey | USA |
| City of Camden, South Carolina | USA |
| City of Campbellsville, Water and Sewer Company, Kentucky | USA |
| City of Canal Winchester, Ohio | USA |
| City of Canon City, Colorado | USA |
| City of Canton City, Ohio | USA |
| City of Canton, Texas | USA |
| City of Cape Coral, Florida | USA |
| City of Carbondale, Illinois | USA |
| City of Carlsbad, California | USA |
| City of Carlsbad, New Mexico | USA |
| City of Carlyle, Illinois | USA |
| City of Carmel, Indiana | USA |
| City of Carrollton, Texas | USA |
| City of Carson City, Nevada | USA |
| City of Cartersville, Georgia | USA |
| City of Caruthersville, Missouri | USA |
| City of Casper, Wyoming | USA |
| City of Casselberry, Florida | USA |
| City of Cassville, Missouri | USA |
| City of Cayce, South Carolina | USA |
| City of Cedar Hill, Texas | USA |
| City of Cedar Park, Texas | USA |
| City of Celina, Ohio | USA |
| City of Centerville, Utah | USA |
| City of Central City, Nebraska | USA |
| City of Centralia, Missouri | USA |
| City of Centralia, Washington | USA |
| City of Ceres, California | USA |
| City of Champlin, Minnesota | USA |
| City of Chandler, Arizona | USA |
| City of Chanhassen, Minnesota | USA |
| City of Charleston, Illinois | USA |
| City of Charlotte and Mecklenburg County, North Carolina | USA |
| City of Charlottesville, Virginia | USA |
| City of Chaska, Minnesota | USA |
| City of Chatsworth Water Commission, Georgia | USA |
| City of Chattachoochee, Florida | USA |
| City of Chattanooga Department of Public Works, Tennessee | USA |
| City of Chelsea, Massachusettes | USA |
| City of Cheney, Washington | USA |
| City of Cherryville, North Carolina | USA |
| City of Cheyenne, Wyoming | USA |
| City of Chicago, Illinois | USA |
| City of Chillicothe, City Utilities Department, Ohio | USA |
| City of Chilliwack, Canada | CAN |
| City of Chino, California | USA |
| City of Chowchilla, California | USA |
| City of Claremore, Oklahoma | USA |
| City of Clarksville, Tennessee | USA |
| City of Clearwater, Florida | USA |
| City of Clemson, South Carolina | USA |
| City of Clermont, Florida | USA |
| City of Cleveland Heights, Ohio | USA |
| City of Cleveland, Ohio | USA |
| City of Clinton, Mississippi | USA |
| City of Clinton, North Carolina | USA |
| City of Clive, Iowa | USA |
| City of Cloquet, Minnesota | USA |
| City of Cloverdale, California | USA |
| City of Coachella, California | USA |
| City of Coahoma, Texas | USA |
| City of Cocoa, Florida | USA |
| City of Coconut Creek, Florida | USA |
| City of Coeur d'Alene, Idaho | USA |
| City of Cohasset, Minnesota | USA |
| City of Cold Lake, Alberta | CAN |
| City of Coldwater, Michigan | USA |
| City of Coleman, Texas | USA |
| City of College Park, Georgia | USA |
| City of College Station, Texas | USA |
| City of Columbia, Missouri | USA |
| City of Columbia, South Carolina | USA |
| City of Columbus, Ohio | USA |
| City of Commerce, Georgia | USA |
| City of Compton, California | USA |
| City of Concord, North Carolina | USA |
| City of Conroe, Texas | USA |
| City of Cookeville, Tennessee | USA |
| City of Coon Rapids, Minnesota | USA |
| City of Coppell, Texas | USA |
| City of Copperas Cove, Texas | USA |
| City of Coralville, Iowa | USA |
| City of Corbin Utilities Commission, Kentucky | USA |
| City of Corcoran, California | USA |
| City of Corona, California | USA |
| City of Corpus Christi, Texas | USA |
| City of Cortez, Colorado | USA |
| City of Corvallis, Oregon | USA |
| City of Cotati, California | USA |
| City of Cottage Grove, Oregon | USA |
| City of Country Club Hills, Illinois | USA |
| City of Covina, California | USA |
| City of Covington, Georgia | USA |
| City of Covington, Louisiana | USA |
| City of Crawfordsville, Indiana | USA |
| City of Crowley, Texas | USA |
| City of Crystal Falls, Michigan | USA |
| City of Crystal Lake, Illinois | USA |
| City of Cuero, Texas | USA |
| City of Cumberland, Maryland | USA |
| City of Cumming, Georgia | USA |
| City of Cuyahoga Falls, Ohio | USA |
| City of Dallas, Texas | USA |
| City of Dania Beach, Florida | USA |
| City of Danville, Virginia | USA |
| City of Davenport, Iowa | USA |
| City of Davis, California | USA |
| City of Dayton, Department of Water, Ohio | USA |
| City of Dayton, Tennessee | USA |
| City of Daytona Beach, Florida | USA |
| City of De Pere, Wisconsin | USA |
| City of DeLand, Florida | USA |
| City of Dearborn, Michigan | USA |
| City of Decatur, Illinois | USA |
| City of Delano, California | USA |
| City of Delaware, Ohio | USA |
| City of Delta, British Columbia | CAN |
| City of Delta, California | USA |
| City of Deltona, Water Utility Services Department, Florida | USA |
| City of Denham Springs, Louisiana | USA |
| City of Denison, Texas | USA |
| City of Denton, Texas | USA |
| City of Derby, Kansas | USA |
| City of Des Plaines, Illinois | USA |
| City of Detroit, Michigan | USA |
| City of Dickinson, North Dakota | USA |
| City of Dinuba, California | USA |
| City of Douglas, Georgia | USA |
| City of Dover, Delaware | USA |
| City of Dover, Ohio | USA |
| City of Downey, California | USA |
| City of DuBois, Pennsylvania | USA |
| City of DuPont, Washington | USA |
| City of Dublin, Georgia | USA |
| City of Duluth Comfort System, Minnesota | USA |
| City of Duncan, Oklahoma | USA |
| City of Duncanville, Texas | USA |
| City of Dunedin, Florida | USA |
| City of Durant, Oklahoma | USA |
| City of Durham, North Carolina | USA |
| City of Eagan, Minnesota | USA |
| City of Eagle Pass, Texas | USA |
| City of East Chicago, Indiana | USA |
| City of East Lansing, Michigan | USA |
| City of East Man, Georgia | USA |
| City of East Point, Georgia | USA |
| City of Eau Claire, Wisconsin | USA |
| City of Eden Prairie, Minnesota | USA |
| City of Edgerton, Kansas | USA |
| City of Edina, Minnesota | USA |
| City of Edmond, Oklahoma | USA |
| City of Edmundston, New Brunswick | CAN |
| City of Edwardsville, Illinois | USA |
| City of El Mirage, Arizona | USA |
| City of El Monte, California | USA |
| City of El Segundo, California | USA |
| City of Elk City, Oklahoma | USA |
| City of Elkhorn Light And Water, Wisconsin | USA |
| City of Elko, Nevada | USA |
| City of Eloy, Arizona | USA |
| City of Elyria, Ohio | USA |
| City of Emporia, Kansas | USA |
| City of Englewood, Colorado | USA |
| City of Englewood, Ohio | USA |
| City of Enid, Oklahoma | USA |
| City of Enterprise, Oregon | USA |
| City of Enumclaw, Washington | USA |
| City of Ephrata, Washington | USA |
| City of Escalon, California | USA |
| City of Escanaba, Mississippi | USA |
| City of Eufaula, Oklahoma | USA |
| City of Eustis, Florida | USA |
| City of Evanston, Illinois | USA |
| City of Everett, Washington | USA |
| City of Fairborn, Ohio | USA |
| City of Fairburn, Georgia | USA |
| City of Fairfield, California | USA |
| City of Fairhope, Alabama | USA |
| City of Fairmont, Minnesota | USA |
| City of Fairmont, West Virginia | USA |
| City of Fairview, Oregon | USA |
| City of Fallon, Nevada | USA |
| City of Falls City, Nebraska | USA |
| City of Fargo, North Dakota | USA |
| City of Farmers Branch, Texas | USA |
| City of Farmersville, Texas | USA |
| City of Farmington, Missouri | USA |
| City of Farmington, New Mexico | USA |
| City of Fayetteville, Georgia | USA |
| City of Fernandina Beach, Florida | USA |
| City of Fernley, Nevada | USA |
| City of Fife, Washington | USA |
| City of Findlay, Ohio | USA |
| City of Firebaugh, California | USA |
| City of Fishers, Indiana | USA |
| City of Fitchburg, Wisconsin | USA |
| City of Flagstaff, Arizona | USA |
| City of Florence, Alabama | USA |
| City of Florence, Kentucky | USA |
| City of Florence, Oregon | USA |
| City of Florence, South Carolina | USA |
| City of Floresville, Texas | USA |
| City of Flowood, Mississippi | USA |
| City of Fond Du Lac, Wisconsin | USA |
| City of Forest Lake, Minnesota | USA |
| City of Fort Collins, Colorado | USA |
| City of Fort Lauderdale, Florida | USA |
| City of Fort Morgan, Colorado | USA |
| City of Fort Myers, Florida | USA |
| City of Fort Smith, Arkansas | USA |
| City of Fort St. John, British Columbia | CAN |
| City of Fort Valley Utility Commission, Georgia | USA |
| City of Fort Worth, Texas | USA |
| City of Fortuna, California | USA |
| City of Foster City, California | USA |
| City of Fountain Valley, California | USA |
| City of Fountain, Colorado | USA |
| City of Framingham, Massachusetts | USA |
| City of Franklin, Ohio | USA |
| City of Frederick, Maryland | USA |
| City of Fredericksburg, Texas | USA |
| City of Fredericksburg, Virginia | USA |
| City of Fredericktown, Missouri | USA |
| City of Freeport, Florida | USA |
| City of Fresno, California | USA |
| City of Friendswood, Texas | USA |
| City of Fruitland, Idaho | USA |
| City of Fullerton, California | USA |
| City of Gahanna, Ohio | USA |
| City of Gainesville, Georgia | USA |
| City of Galesburg, Illinois | USA |
| City of Galveston, Texas | USA |
| City of Garden City, Idaho | USA |
| City of Garden City, Kansas | USA |
| City of Garden Grove, California | USA |
| City of Gardner, Kansas | USA |
| City of Garland, Texas | USA |
| City of Gastonia, North Carolina | USA |
| City of Geneva, Illinois | USA |
| City of Gentry, Arkansas | USA |
| City of Georgetown, South Carolina | USA |
| City of Georgetown, Texas | USA |
| City of Germantown, Tennessee | USA |
| City of Gillette, Wyoming | USA |
| City of Gilroy, California | USA |
| City of Glendale, Arizona | USA |
| City of Glendale, California | USA |
| City of Glendora, California | USA |
| City of Globe, Arizona | USA |
| City of Goddard, Kansas | USA |
| City of Golden Valley, Minnesota | USA |
| City of Goldsboro, North Carolina | USA |
| City of Gonzales, Louisiana | USA |
| City of Goodlettsville, Tennessee | USA |
| City of Goodyear, Arizona | USA |
| City of Gothenburg, Nebraska | USA |
| City of Graham, North Carolina | USA |
| City of Granbury, Texas | USA |
| City of Grand Forks, North Dakota | USA |
| City of Grand Haven, Michigan | USA |
| City of Grand Island, NE | USA |
| City of Grand Junction, Colorado | USA |
| City of Grand Ledge, Michigan | USA |
| City of Grand Prairie, Texas | USA |
| City of Grand Rapids Water System, Michigan | USA |
| City of Granite Falls, Washington | USA |
| City of Grants, New Mexico | USA |
| City of Grapevine, Texas | USA |
| City of Great Falls, Montana | USA |
| City of Greeley, Colorado | USA |
| City of Green Cove Springs, Florida | USA |
| City of Greensboro, North Carolina | USA |
| City of Greensburg, Indiana | USA |
| City of Greenville, Illinois | USA |
| City of Greenville, Michigan | USA |
| City of Greenville, Texas | USA |
| City of Gridley, California | USA |
| City of Griffin, Georgia | USA |
| City of Grimes, Iowa | USA |
| City of Grove City, Pennsylvania | USA |
| City of Grover Beach, California | USA |
| City of Gulf Breeze, Florida | USA |
| City of Gulfport, Mississippi | USA |
| City of Guthrie, Oklahoma | USA |
| City of Hagerstown, Maryland | USA |
| City of Hailey, Idaho | USA |
| City of Haines City Utilities, Florida | USA |
| City of Hallandale Beach, Florida | USA |
| City of Haltom City, Texas | USA |
| City of Hammond, Louisiana | USA |
| City of Hapeville, Georgia | USA |
| City of Harrison, Arkansas | USA |
| City of Harrison, Michigan | USA |
| City of Harrisonburg, Virginia | USA |
| City of Harrisonville, Missouri | USA |
| City of Hastings, Minnesota | USA |
| City of Hawley, Minnesota | USA |
| City of Hayward, California | USA |
| City of Healdsburg, California | USA |
| City of Heath, Ohio | USA |
| City of Hemet, California | USA |
| City of Henderson, Kentucky | USA |
| City of Henderson, Nevada | USA |
| City of Henderson, North Carolina | USA |
| City of Hermiston, Oregon | USA |
| City of Hesperia, California | USA |
| City of Hewitt, Texas | USA |
| City of Hialeah, Florida | USA |
| City of Hidalgo, Texas | USA |
| City of Higginsville, Missouri | USA |
| City of High Point, North Carolina | USA |
| City of High Springs, Florida | USA |
| City of Hillsboro Public Utilities, Ohio | USA |
| City of Hillsboro, Oregon | USA |
| City of Hobbs, New Mexico | USA |
| City of Holdrege, Nebraska | USA |
| City of Hollister, California | USA |
| City of Hollywood, Florida | USA |
| City of Holyoke, Massachusetts | USA |
| City of Homestead, Florida | USA |
| City of Hood River, Oregon | USA |
| City of Hopkins, MN | USA |
| City of Howard Lake, Minnesota | USA |
| City of Huber Heights, Ohio | USA |
| City of Hudson, Ohio | USA |
| City of Humble, Texas | USA |
| City of Huntington Beach, California | USA |
| City of Huntsville, Texas | USA |
| City of Huron, California | USA |
| City of Hurst, Texas | USA |
| City of Hutchinson, Kansas | USA |
| City of Hutto, Texas | USA |
| City of Idaho Falls, Idaho | USA |
| City of Independence, Kansas | USA |
| City of Independence, Missouri | USA |
| City of Independence, Oregon | USA |
| City of Indianola, Iowa | USA |
| City of Inglewood, California | USA |
| City of Inver Grove Heights, Minnesota | USA |
| City of Iola, Kansas | USA |
| City of Iowa City, Iowa | USA |
| City of Irving, Texas | USA |
| City of Jacinto City, Texas | USA |
| City of Jackson, California | USA |
| City of Jackson, Michigan | USA |
| City of Jackson, Mississippi | USA |
| City of Jacksonville, North Carolina | USA |
| City of Jacksonville, Texas | USA |
| City of Jersey Village, Texas | USA |
| City of Johnson City, Tennessee | USA |
| City of Joliet, Illinois | USA |
| City of Joplin, Missouri | USA |
| City of Kalamazoo, Michigan | USA |
| City of Kamas City, Utah | USA |
| City of Kamloops, Canada | CAN |
| City of Kannapolis, North Carolina | USA |
| City of Katy, Texas | USA |
| City of Kaufman, Texas | USA |
| City of Kearney, Nebraska | USA |
| City of Keller, Texas | USA |
| City of Kelso, Washington | USA |
| City of Kemmerer, Wyoming | USA |
| City of Kennewick, Washington | USA |
| City of Kenora, Ontario | USA |
| City of Kent, Ohio | USA |
| City of Kent, WA | USA |
| City of Kerman, California | USA |
| City of Kerrville, Texas | USA |
| City of Ketchum, Idaho | USA |
| City of Killeen, Texas | USA |
| City of Kingman, Arizona | USA |
| City of Kings Mountain, North Carolina | USA |
| City of Kingsburg Utilities, California | USA |
| City of Kingsport Water, Public Works Department, Tennessee | USA |
| City of Kirkland, Washington | USA |
| City of Kirkwood, Missouri | USA |
| City of Klamath Falls, Oregon | USA |
| City of Kosciusko, Mississippi | USA |
| City of Kuna, Idaho | USA |
| City of Kyle, Texas | USA |
| City of La Crosse, Wisconsin | USA |
| City of La Fayette, Alabama | USA |
| City of La Junta, Colorado | USA |
| City of La Porte, Indiana | USA |
| City of LaFayette, Georgia | USA |
| City of LaGrange, Georgia | USA |
| City of Lacombe, Alberta | CAN |
| City of Lafayette, Colorado | USA |
| City of Lafayette, Indiana | USA |
| City of Lafayette, Tennessee | USA |
| City of Lago Vista, Texas | USA |
| City of Lake Alfred, Florida | USA |
| City of Lake Charles, Louisiana | USA |
| City of Lake City, Florida | USA |
| City of Lake Mary, Florida | USA |
| City of Lake Oswego, Oregon | USA |
| City of Lake Worth, Florida | USA |
| City of Lakewood Utilities, Colorado | USA |
| City of Lakewood, California | USA |
| City of Lakewood, Ohio | USA |
| City of Lamar, Colorado | USA |
| City of Lancaster, Ohio | USA |
| City of Lancaster, Pennsylvania | USA |
| City of Lancaster, South Carolina | USA |
| City of Lancaster, Texas | USA |
| City of Lander, Wyoming | USA |
| City of Langley, British Columbia | CAN |
| City of Laredo, Texas | USA |
| City of Larned, Kansas | USA |
| City of Las Cruces, New Mexico | USA |
| City of Las Vegas, Nevada | USA |
| City of Las Vegas, New Mexico | USA |
| City of Lathrop Water System, California | USA |
| City of Lauderhill, Florida | USA |
| City of Lawrence Utilities, Indiana | USA |
| City of Lawrence, Kansas | USA |
| City of Lawrence, Massachusetts | USA |
| City of Lawton, Oklahoma | USA |
| City of Le Sueur, Minnesota | USA |
| City of League City, Texas | USA |
| City of Leavenworth, Washington | USA |
| City of Lebanon, Missouri | USA |
| City of Lebanon, Ohio | USA |
| City of Lebanon, Oregon | USA |
| City of Lebanon, Tennessee | USA |
| City of Lee's Summit, Missouri | USA |
| City of Leesburg, Florida | USA |
| City of Lenoir, Tennessee | USA |
| City of Leon Valley, Texas | USA |
| City of Lethbridge, Alberta | CAN |
| City of Lewisburg, Tennessee | USA |
| City of Lewiston, Indiana | USA |
| City of Lewisville, Texas | USA |
| City of Lexington, Nebraska | USA |
| City of Lexington, North Carolina | USA |
| City of Liberty, Missouri | USA |
| City of Lima, Ohio | USA |
| City of Lincoln City, Oregon | USA |
| City of Lincoln, California | USA |
| City of Lincoln, Nebraska | USA |
| City of Lincolnton, North Carolina | USA |
| City of Litchfield, Illinois | USA |
| City of Littleton, Colorado | USA |
| City of Livermore, California | USA |
| City of Livingston, Montana | USA |
| City of Livingston, Texas | USA |
| City of Lloydminster, Alberta | CAN |
| City of Lockport, Illinois | USA |
| City of Lockwood, Missouri | USA |
| City of Locust Grove, Georgia | USA |
| City of Lodi, California | USA |
| City of Logan, Utah | USA |
| City of Loganville, Georgia | USA |
| City of London, Ohio | USA |
| City of Long Beach, California & Long Beach Water | USA |
| City of Long Beach, Washington | USA |
| City of Longmont, Colorado | USA |
| City of Longview, Texas | USA |
| City of Los Angeles Bureau of Sanitation | USA |
| City of Los Banos, California | USA |
| City of Los Fresnos, Texas | USA |
| City of Louisburg, Kansas | USA |
| City of Loveland, Colorado | USA |
| City of Loveland, Ohio | USA |
| City of Lubbock Utilities, Texas | USA |
| City of Lufkin, Texas | USA |
| City of Lumberton, North Carolina | USA |
| City of Lynchburg, Virginia | USA |
| City of Lynwood, California | USA |
| City of Lyons, Georgia | USA |
| City of Madera, California | USA |
| City of Madison, Alabama | USA |
| City of Madison, Georgia | USA |
| City of Madison, Wisconsin | USA |
| City of Madisonville, Kentucky | USA |
| City of Maitland, Florida | USA |
| City of Malden, Massachusetts | USA |
| City of Malvern Water Works, Arkansas | USA |
| City of Manassas Park, Virginia | USA |
| City of Manchester, New Hampshire | USA |
| City of Manhattan Beach Water and Sewer, California | USA |
| City of Manhattan, Kansas | USA |
| City of Mankato, Minnesota | USA |
| City of Manning Utility Department, South Carolina | USA |
| City of Mansfield, Texas | USA |
| City of Manteca, California | USA |
| City of Marble Falls, Texas | USA |
| City of Marfa, Texas | USA |
| City of Marianna, Florida | USA |
| City of Marinette Water Utility, Wisconsin | USA |
| City of Marion Water Department, Illinois | USA |
| City of Marion, Iowa | USA |
| City of Marion, Ohio | USA |
| City of Marshall, Illinois | USA |
| City of Marshall, Michigan | USA |
| City of Marshall, Texas | USA |
| City of Martinsville, Virginia | USA |
| City of Marysville, Ohio | USA |
| City of Marysville, Washington | USA |
| City of Maryville, Missouri | USA |
| City of Mascoutah, Illinois | USA |
| City of Mason City, Iowa | USA |
| City of Mason, Michigan | USA |
| City of Maui, Hawaii | USA |
| City of McKenzie, Tennessee | USA |
| City of Meadows Place, Texas | USA |
| City of Mebane, North Carolina | USA |
| City of Medford, Massachusetts | USA |
| City of Medford, Oregon | USA |
| City of Medicine Hat, Alberta, Canada | CAN |
| City of Medina, Minnesota | USA |
| City of Melbourne, Florida | USA |
| City of Melrose, Minnesota | USA |
| City of Menasha, Wisconsin | USA |
| City of Menlo Park, California | USA |
| City of Merced, California | USA |
| City of Meridian, Idaho | USA |
| City of Meridian, Mississippi | USA |
| City of Mesa, Arizona | USA |
| City of Mesquite, Texas | USA |
| City of Methuen, Massachusetts | USA |
| City of Mexico, Missouri | USA |
| City of Miami Beach, Florida | USA |
| City of Miamisburg, Ohio | USA |
| City of Middleton, Wisconsin | USA |
| City of Middletown Water, Ohio | USA |
| City of Midland, Michigan | USA |
| City of Midlothian, Texas | USA |
| City of Midwest City, Oklahoma | USA |
| City of Milford, Delaware | USA |
| City of Milledgeville, Georgia | USA |
| City of Milpitas, California | USA |
| City of Milton, Washington | USA |
| City of Milton-Freewater, Oregon | USA |
| City of Milwaukee, Wisconsin | USA |
| City of Milwaukie, Oregon | USA |
| City of Minneapolis, Minnesota | USA |
| City of Minot, North Dakota | USA |
| City of Miramar, Utilities Department, Florida | USA |
| City of Mishawaka, Indiana | USA |
| City of Mission, Texas | USA |
| City of Missoula, Montana | USA |
| City of Missouri City, Texas | USA |
| City of Moab, Utah | USA |
| City of Moberly, Missouri | USA |
| City of Modesto, California | USA |
| City of Moncton, New Brunswick | CAN |
| City of Monmouth, Oregon | USA |
| City of Monroe, Louisiana | USA |
| City of Monroe, North Carolina | USA |
| City of Monroe, Ohio | USA |
| City of Monroe, Washington | USA |
| City of Monroe, Wisconsin | USA |
| City of Monrovia Utilities, California | USA |
| City of Montclair, New Jersey | USA |
| City of Monterey Park, California | USA |
| City of Monticello, Indiana | USA |
| City of Montrose, Colorado | USA |
| City of Moore, Oklahoma | USA |
| City of Moorhead, Minnesota | USA |
| City of Moreno Valley, California | USA |
| City of Morgan Hill, the Public Works Department, California | USA |
| City of Morganton, North Carolina | USA |
| City of Morris, Minnesota | USA |
| City of Moscow, Idaho | USA |
| City of Moses Lake, Washington | USA |
| City of Mount Airy, North Carolina | USA |
| City of Mount Holly, North Carolina | USA |
| City of Mount Morris, Michigan | USA |
| City of Mount Vernon, Illinois | USA |
| City of Mount Vernon, Indiana | USA |
| City of Mount Vernon, Missouri | USA |
| City of Mount Vernon, Water Department, Ohio | USA |
| City of Mountain View, California | USA |
| City of Mountlake Terrace, Washington | USA |
| City of Mulvane, Kansas | USA |
| City of Murfreesboro, Tennessee | USA |
| City of Murphysboro, Illinois | USA |
| City of Murray City, Utah | USA |
| City of Murray, Kentucky | USA |
| City of Myrtle Beach, Public Works Department, South Carolina | USA |
| City of Nacogdoches, Texas | USA |
| City of Nampa, Idaho | USA |
| City of Nanaimo, British Columbia | CAN |
| City of Naperville, Illinois | USA |
| City of Naples, Florida | USA |
| City of Napoleon, Water Department, Ohio | USA |
| City of Nassau Bay, Texas | USA |
| City of Natchitoches, Louisiana | USA |
| City of Navasota, Texas | USA |
| City of Negaunee, Michigan | USA |
| City of Nevada, Missouri | USA |
| City of New Bedford, Massachusetts | USA |
| City of New Bern, North Carolina | USA |
| City of New Braunfels, Texas | USA |
| City of New Castle, Indiana | USA |
| City of New Castle, Oklahoma | USA |
| City of New Haven, Indiana | USA |
| City of New London, Connecticut | USA |
| City of New Martinsville, West Virginia | USA |
| City of New Ulm, Minnesota | USA |
| City of Newark, Delaware | USA |
| City of Newark, Ohio | USA |
| City of Newberg, Oregon | USA |
| City of Newberry, Florida | USA |
| City of Newburyport, Massachusetts | USA |
| City of Newport Beach, California | USA |
| City of Newton, Massachusetts | USA |
| City of Newton, North Carolina | USA |
| City of Niagara Falls, Canada | CAN |
| City of Niceville, Florida | USA |
| City of Niles, Ohio | USA |
| City of Niles, Utilities Department, Michigan | USA |
| City of Nixa Utilities, Missouri | USA |
| City of North Bay, Ontario | CAN |
| City of North Bend, Washington | USA |
| City of North Canton, Utility Department, Ohio | USA |
| City of North Las Vegas, Nevada | USA |
| City of North Lauderdale, Florida | USA |
| City of North Mankato, Minnesota | USA |
| City of North Miami Beach, Florida | USA |
| City of North Myrtle Beach, South Carolina | USA |
| City of North Platte, Nebraska | USA |
| City of North Richland Hills, Texas | USA |
| City of North Ridgeville, Ohio | USA |
| City of North Salt Lake, Utah | USA |
| City of North Vancouver, British Columbia | CAN |
| City of Northfield, Minnesota | USA |
| City of Northglenn, Colorado | USA |
| City of Northlake, Illinois | USA |
| City of Northport, Alabama | USA |
| City of Norwalk, Ohio | USA |
| City of Norwich, Connecticut | USA |
| City of Norwood, Ohio | USA |
| City of Novi, Michigan | USA |
| City of O'Fallon, Illinois | USA |
| City of Oak Creek, Wisconsin | USA |
| City of Oak Grove, Kentucky | USA |
| City of Oak Grove, Missouri | USA |
| City of Oak Harbor, Washington | USA |
| City of Oak Park Heights, Minnesota | USA |
| City of Oak Park, Michigan | USA |
| City of Oakdale, California | USA |
| City of Oakdale, Minnesota | USA |
| City of Oakland Park, Florida | USA |
| City of Oakridge, Oregon | USA |
| City of Oakridge, Tennessee | USA |
| City of Oberlin, Public Works Department, Ohio | USA |
| City of Ocala, Florida | USA |
| City of Oceanside, California | USA |
| City of Ocoee, Florida | USA |
| City of Odessa, Missouri | USA |
| City of Odessa, Texas | USA |
| City of Oklahoma City, Oklahoma | USA |
| City of Olathe, Kansas | USA |
| City of Oldsmar, Florida | USA |
| City of Olive Hill, Kentucky | USA |
| City of Olympia, Utilities Department, Washington | USA |
| City of Orange City, Florida | USA |
| City of Orange, Public Works Water Division, California | USA |
| City of Orange, Texas | USA |
| City of Orangeburg, South Carolina | USA |
| City of Oregon, Ohio | USA |
| City of Orem, Utah | USA |
| City of Ormond Beach, Florida | USA |
| City of Orono, Minnesota | USA |
| City of Oroville, Washington | USA |
| City of Oshkosh, Wisconsin | USA |
| City of Othello, Washington | USA |
| City of Ottawa, Ontario | CAN |
| City of Oviedo, Florida | USA |
| City of Owasso Utility Billing Department, Oklahoma | USA |
| City of Owosso, Michigan | USA |
| City of Oxford, North Carolina | USA |
| City of Oxnard, California | USA |
| City of Pacific, Washington | USA |
| City of Page, Arizona | USA |
| City of Palm Coast, Florida | USA |
| City of Palo Alto, California | USA |
| City of Papillion, Nebraska | USA |
| City of Paramount, California | USA |
| City of Paris, Kentucky | USA |
| City of Park Hills, Missouri | USA |
| City of Park Ridge, Illinois | USA |
| City of Pasadena, Water and Power, California | USA |
| City of Pasco, Washington | USA |
| City of Pataskala, Ohio | USA |
| City of Patterson, Utilities Department, California | USA |
| City of Payson, Utah | USA |
| City of Peabody, Massachusetts | USA |
| City of Pearland, Water and Sewer Billing, Texas | USA |
| City of Peekskill, New York | USA |
| City of Pella, Iowa | USA |
| City of Penticton, British Columbia | CAN |
| City of Peoria, Arizona | USA |
| City of Perham, Minnesota | USA |
| City of Perrysburg, Ohio | USA |
| City of Perth Amboy, New Jersey | USA |
| City of Petaluma, California | USA |
| City of Petoskey, Department of Public Works, Michigan | USA |
| City of Pewaukee, Wisconsin | USA |
| City of Pflugerville, Texas | USA |
| City of Pharr, Texas | USA |
| City of Phenix City, Alabama | USA |
| City of Philadelphia Water, Pennsylvania | USA |
| City of Phoenix, Arizona | USA |
| City of Pickerington, Ohio | USA |
| City of Pigeon Forge, Tennessee | USA |
| City of Pinellas Park Public Utilities, Florida | USA |
| City of Pittsburg, California | USA |
| City of Plainview, Texas | USA |
| City of Plano, Texas | USA |
| City of Plant City, Florida | USA |
| City of Plaquemine, Louisiana | USA |
| City of Plattsburg, Missouri | USA |
| City of Plattsburgh, New York | USA |
| City of Pleasant Grove, Utah | USA |
| City of Pleasanton, California | USA |
| City of Plymouth, Michigan | USA |
| City of Plymouth, Minnesota | USA |
| City of Pocatello, Idaho | USA |
| City of Pomona, Water Division, California | USA |
| City of Pompano Beach, Florida | USA |
| City of Ponca City, Oklahoma | USA |
| City of Pooler, Georgia | USA |
| City of Poplar Bluff, Missouri | USA |
| City of Port Arthur, Texas | USA |
| City of Port Hueneme, California | USA |
| City of Port Richey, Florida | USA |
| City of Port St. Lucie, Water Distribution and Wastewater Collection Division, Florida | USA |
| City of Port Townsend, Washington | USA |
| City of Portage, Indiana | USA |
| City of Portland, Oregon | USA |
| City of Portland, Tennessee | USA |
| City of Portsmouth Public Utilities, Ohio | USA |
| City of Portsmouth, Department of Public Utilities, Virginia | USA |
| City of Portsmouth, New Hampshire | USA |
| City of Post Falls, Idaho | USA |
| City of Poway, California | USA |
| City of Powell, Wyoming | USA |
| City of Pratt, Kansas | USA |
| City of Price City, Utah | USA |
| City of Prince George, British Columbia | CAN |
| City of Princeton, Illinois | USA |
| City of Prior Lake, Minnesota | USA |
| City of Provo, Utah | USA |
| City of Punta Gorda, Florida | USA |
| City of Quanah, Texas | USA |
| City of Quincy, Florida | USA |
| City of Quincy, Illinois | USA |
| City of Raleigh, North Carolina | USA |
| City of Rancho Cucamonga Municipal Utility (RCMU), California | USA |
| City of Rawlins, Wyoming | USA |
| City of Red Deer, Alberta | CAN |
| City of Red Lodge, Montana | USA |
| City of Redding, California | USA |
| City of Redlands, California | USA |
| City of Redmond, Redmond Water Utility, Oregon | USA |
| City of Redmond, Washington | USA |
| City of Redwood City, California | USA |
| City of Reedley, California | USA |
| City of Regina | CAN |
| City of Reidsville, North Carolina | USA |
| City of Reno, Nevada | USA |
| City of Rensselaer, Indiana | USA |
| City of Renton, Washington | USA |
| City of Rexburg, Idaho | USA |
| City of Rich Hill, Missouri | USA |
| City of Richardson, Public Services Water Division, Texas | USA |
| City of Richfield, Minnesota | USA |
| City of Richland Hills, Water Maintenance Division, Texas | USA |
| City of Richland, Washington | USA |
| City of Richmond Hill, Georgia | USA |
| City of Richmond Water Department, Texas | USA |
| City of Richmond, British Columbia | CAN |
| City of Richmond, Virginia | USA |
| City of Rio Grande City, Texas | USA |
| City of Ripon, Wisconsin | USA |
| City of Riverside Public Utilities, California | USA |
| City of Riviera Beach, Florida | USA |
| City of Rochester Hills, Michigan | USA |
| City of Rochester, New York | USA |
| City of Rock Falls, Illinois | USA |
| City of Rock Hill, South Carolina | USA |
| City of Rock Island, Illinois | USA |
| City of Rockford, Illinois | USA |
| City of Rockwall, Texas | USA |
| City of Rogers, Arkansas | USA |
| City of Rogers, Minnesota | USA |
| City of Rohnert Park, California | USA |
| City of Rollingwood, Texas | USA |
| City of Roma, Texas | USA |
| City of Roseburg, Oregon | USA |
| City of Rosenberg, Texas | USA |
| City of Roseville, California | USA |
| City of Roseville, Minnesota | USA |
| City of Roswell, Georgia | USA |
| City of Roswell, New Mexico | USA |
| City of Round Rock, Texas | USA |
| City of Rox Boro, North Carolina | USA |
| City of Royal Oak, Michigan | USA |
| City of Sachse, Texas | USA |
| City of Sacramento, California | USA |
| City of Safety Harbor, Florida | USA |
| City of Saginaw, Texas | USA |
| City of Saint Charles, Missouri | USA |
| City of Saint Peters, Missouri | USA |
| City of Saint Robert, Missouri | USA |
| City of Salem, Indiana | USA |
| City of Salem, Massachusetts | USA |
| City of Salem, Ohio | USA |
| City of Salem, Oregon | USA |
| City of Salem, Virginia | USA |
| City of Salina, Kansas | USA |
| City of Salisbury, North Carolina | USA |
| City of Sallisaw, Oklahoma | USA |
| City of Salmon Arm, British Columbia | USA |
| City of San Bernardino, California | USA |
| City of San Bruno, California | USA |
| City of San Clemente, California | USA |
| City of San Diego, California | USA |
| City of San Jose, California | USA |
| City of San Luis Obispo, California | USA |
| City of San Luis, Arizona | USA |
| City of San Marcos | USA |
| City of Sanborn, Minnesota | USA |
| City of Sandy, Oregon | USA |
| City of Sanford, Florida | USA |
| City of Sanford, North Carolina | USA |
| City of Santa Ana, California | USA |
| City of Santa Barbara, California | USA |
| City of Santa Clara, California | USA |
| City of Santa Cruz, California | USA |
| City of Santa Fe, New Mexico | USA |
| City of Santa Maria, California | USA |
| City of Santa Monica, California | USA |
| City of Santa Rosa, California | USA |
| City of Saratoga Springs, New York | USA |
| City of Saskatoon, Saskatchewan | CAN |
| City of Savage, Minnesota | USA |
| City of Schenectady, New YorK | USA |
| City of Schertz, Texas | USA |
| City of Scott City, Missouri | USA |
| City of Scottsbluff, Nebraska | USA |
| City of Scottsdale, Arizona | USA |
| City of Seabrook, Texas | USA |
| City of Seal Beach, California | USA |
| City of Seattle, Washington | USA |
| City of Sebastopol, California | USA |
| City of Seguin, Texas | USA |
| City of Selah, Washington | USA |
| City of Selma, Texas | USA |
| City of Seneca, South Carolina | USA |
| City of Seward, Alaska | USA |
| City of Seward, Nebraska | USA |
| City of Shafter, California | USA |
| City of Sheboygan, Wisconsin | USA |
| City of Shelby, North Carolina | USA |
| City of Sheridan, Wyoming | USA |
| City of Sherman, Texas | USA |
| City of Sherrill, New York | USA |
| City of Sherwood, Oregon | USA |
| City of Show Low, Arizona | USA |
| City of Sidney, Ohio | USA |
| City of Signal Hill, California | USA |
| City of Siloam Springs, Arkansas | USA |
| City of Simi Valley, California | USA |
| City of Sioux City, Iowa | USA |
| City of Sisters, Oregon | USA |
| City of Slidell, Louisiana | USA |
| City of Smyrna, Georgia | USA |
| City of Social Circle, Georgia | USA |
| City of Solon, Ohio | USA |
| City of Solvang, California | USA |
| City of Somerset, Kentucky | USA |
| City of Somerville, Massachusetts | USA |
| City of Sonoma, California | USA |
| City of Sopchoppy, Florida | USA |
| City of South Bend, Indiana | USA |
| City of South Daytona, Florida | USA |
| City of South St. Paul, Minnesota | USA |
| City of Southfield, Michigan | USA |
| City of Southport, North Carolina | USA |
| City of Sparks Revenue, Nevada | USA |
| City of Spokane, Washington | USA |
| City of Spooner, Wisconsin | USA |
| City of Spring Hill, Kansas | USA |
| City of Spring Hill, Tennessee | USA |
| City of Spring Lake Park, Minnesota | USA |
| City of Spring Valley Village, Texas | USA |
| City of Springboro Utility Department, Ohio | USA |
| City of Springfield, Ohio | USA |
| City of Spruce Grove, Alberta | CAN |
| City of St Helena, California | USA |
| City of St Louis, Michigan | USA |
| City of St Marys, GA | USA |
| City of St Petersburg, Florida | USA |
| City of St. Albert, Canada | CAN |
| City of St. Augustine, Florida | USA |
| City of St. Charles, Illinois | USA |
| City of St. Cloud, Minnesota | USA |
| City of St. George, Utah | USA |
| City of St. James, Minnesota | USA |
| City of St. Joseph, Missouri | USA |
| City of St. Marys, Ohio | USA |
| City of Statesboro, Georgia | USA |
| City of Statesville, NC | USA |
| City of Stephenville, Texas | USA |
| City of Sterling Heights, Michigan | USA |
| City of Sterling, Kansas | USA |
| City of Stevenson, Washington | USA |
| City of Stillwater, Oklahoma | USA |
| City of Stilwell, Oklahoma | USA |
| City of Stockbridge, Georgia | USA |
| City of Stockton, California | USA |
| City of Stow, Ohio | USA |
| City of Strafford, Missouri | USA |
| City of Sturgis, South Dakota | USA |
| City of Sugar Hill, Georgia | USA |
| City of Sugar Land, Texas | USA |
| City of Sullivan, Illinois | USA |
| City of Summerville, Georgia | USA |
| City of Sumner, Washington | USA |
| City of Sumter, South Carolina | USA |
| City of Sunnyside, Washington | USA |
| City of Sunnyvale, California | USA |
| City of Sunrise, Florida | USA |
| City of Surrey, Canada | CAN |
| City of Sweet Home, Oregon | USA |
| City of Sydney, Nebraska | USA |
| City of Tacoma, Washington | USA |
| City of Tallahassee, Florida | USA |
| City of Tamarac, Florida | USA |
| City of Tampa, Florida | USA |
| City of Tarpon Springs, Florida | USA |
| City of Tecumseh, Oklahoma | USA |
| City of Tempe, Arizona | USA |
| City of Temple Terrace, Florida | USA |
| City of Temple, Texas | USA |
| City of Terre Haute, Indiana | USA |
| City of Texas City, Texas | USA |
| City of Texico, New Mexico | USA |
| City of The Colony, Texas | USA |
| City of Thibodaux, Louisiana | USA |
| City of Thomasville, Georgia | USA |
| City of Thomasville, North Carolina | USA |
| City of Thornton, Colorado | USA |
| City of Thousand Oaks, California | USA |
| City of Tigard, Oregon | USA |
| City of Tillamook, Oregon | USA |
| City of Tipp City, Ohio | USA |
| City of Tipton, Iowa | USA |
| City of Tooele, Utah | USA |
| City of Topeka, Kansas | USA |
| City of Torrance, California | USA |
| City of Torrington, Wyoming | USA |
| City of Tracy, California | USA |
| City of Trenton, Missouri | USA |
| City of Trotwood, Ohio | USA |
| City of Troutdale, Oregon | USA |
| City of Troy, Alabama | USA |
| City of Tualatin, Oregon | USA |
| City of Tucson, Arizona | USA |
| City of Tukwila, Washington | USA |
| City of Tulare, California | USA |
| City of Tulsa, Oklahoma | USA |
| City of Turlock, California | USA |
| City of Tuscaloosa, Alabama | USA |
| City of Tustin, California | USA |
| City of Twin Falls, Idaho | USA |
| City of Tyler, Texas | USA |
| City of Union, South Carolina | USA |
| City of University Park, Texas | USA |
| City of Upland, California | USA |
| City of Upper Sandusky, Ohio | USA |
| City of Urbandale, Iowa | USA |
| City of Utica, Michigan | USA |
| City of Uvalde, Texas | USA |
| City of Vadnais Heights, Minnesota | USA |
| City of Valdosta, Georgia | USA |
| City of Vallejo, California | USA |
| City of Vanceburg, Kentucky | USA |
| City of Vancouver, Washington | USA |
| City of Vandalia, Ohio | USA |
| City of Ventura, California | USA |
| City of Vernal, Utah | USA |
| City of Victoria, British Columbia | CAN |
| City of Victoria, Texas | USA |
| City of Victorville, California | USA |
| City of Vidalia, Georgia | USA |
| City of Vineland, New Jersey | USA |
| City of Virginia Beach, Virginia | USA |
| City of Visalia, California | USA |
| City of Wadsworth, Ohio | USA |
| City of Waite Park, Minnesota | USA |
| City of Walhalla, South Carolina | USA |
| City of Waltham, Massachusetts | USA |
| City of Wapakoneta, Ohio | USA |
| City of Wapato, Washington | USA |
| City of Warner Robins, Georgia | USA |
| City of Warren, Michigan | USA |
| City of Warren, Ohio | USA |
| City of Warsaw, Missouri | USA |
| City of Washington Court House, Ohio | USA |
| City of Washington, Indiana | USA |
| City of Washington, Missouri | USA |
| City of Washington, North Carolina | USA |
| City of Watauga, Texas | USA |
| City of Waterloo, Ontario | CAN |
| City of Watertown, Wisconsin | USA |
| City of Watsonville, California | USA |
| City of Waxahachie, Texas | USA |
| City of Waycross, Georgia | USA |
| City of Waynesboro, Virginia | USA |
| City of Weatherford, Texas | USA |
| City of Webster, Texas | USA |
| City of Wentzville, Missouri | USA |
| City of Weslaco, Texas | USA |
| City of West Allis, Wisconsin | USA |
| City of West Bend, Wisconsin | USA |
| City of West Fargo, North Dakota | USA |
| City of West Kelowna, British Columbia | CAN |
| City of West Lake Hills, Texas | USA |
| City of West Linn, Oregon | USA |
| City of West Melbourne, Florida | USA |
| City of West Palm Beach Public Utilities, Florida | USA |
| City of West Point, Georgia | USA |
| City of West University Place, Texas | USA |
| City of Westerville Electric Division, Ohio | USA |
| City of Westlake, Ohio | USA |
| City of Westminster, Colorado | USA |
| City of Westwego, Louisiana | USA |
| City of White Plains, New York | USA |
| City of White Settlement, Texas | USA |
| City of Whitehouse, Texas | USA |
| City of Wichita Falls, Texas | USA |
| City of Wichita, Kansas | USA |
| City of Wilcox, Arizona | USA |
| City of Wildwood, Florida | USA |
| City of Williamsburg, Virginia | USA |
| City of Williston, North Dakota | USA |
| City of Willow Park, Texas | USA |
| City of Wilmington, Delaware | USA |
| City of Wilmington, North Carolina | USA |
| City of Wilson, North Carolina | USA |
| City of Wilsonville, Oregon | USA |
| City of Wilton Manors, Florida | USA |
| City of Winchester, Virginia | USA |
| City of Winder, Georgia | USA |
| City of Windom, Minnesota | USA |
| City of Winfield, Kansas | USA |
| City of Winnipeg, Manitoba | CAN |
| City of Winona, Minnesota | USA |
| City of Winslow, Arizona | USA |
| City of Winston Salem, North Carolina | USA |
| City of Winter Garden, Florida | USA |
| City of Winter Haven, Florida | USA |
| City of Winter Park, Florida | USA |
| City of Winter Springs, Florida | USA |
| City of Wood Dale, Illinois | USA |
| City of Woodbury, Minnesota | USA |
| City of Woodland, California | USA |
| City of Woodstock, Georgia | USA |
| City of Woodstock, Illinois | USA |
| City of Woodway, Texas | USA |
| City of Worland, Wyoming | USA |
| City of Wyandotte, Michigan | USA |
| City of Wylie, Texas | USA |
| City of Xenia, Ohio | USA |
| City of Yoakum, Texas | USA |
| City of York, Nebraska | USA |
| City of Youngstown, Ohio | USA |
| City of Yreka, California | USA |
| City of Yuba City Public Works Department, California | USA |
| City of Yuma, Arizona | USA |
| City of Zachary, Louisiana | USA |
| City of Zanesville, Ohio | USA |
| Clackamas River Water, Oregon | USA |
| Claiborne Electric Cooperative Incorporated | USA |
| Clallam County Public Utilities Department (PUD), Washington | USA |
| Clark County Rural Electric Membership Corporation (REMC) | USA |
| Clark County Water Reclamation District, Nevada | USA |
| Clark Electric Cooperative, Wisconsin | USA |
| Clark Energy Cooperative, Kentucky | USA |
| Clark Public Utilities, Washington | USA |
| Clark Regional Wastewater District, Washington | USA |
| Clarke Electric Cooperative, Inc. | USA |
| Clarke-Washington Electric Membersip Corporation (EMC), Alabama | USA |
| Clarksdale Public Utilities, Mississippi | USA |
| Clarksville Connected Utilities, Arkansas | USA |
| Clarksville Department of Electricity (CDE), Tennessee | USA |
| Clatskanie People's Utility District, Oregon | USA |
| Claverack Rural Electric Cooperative (REC), Inc. | USA |
| Clay County Utility Authority, Florida | USA |
| Clay Electric Cooperative, Inc. | USA |
| Clayton County Water Authority, Georgia | USA |
| Clear Brook City Municipal Utility District, Texas | USA |
| Clear Creek Community Services District, California | USA |
| Clear Lake City Water Authority, Texas | USA |
| Clearfield Municipal Authority, Pennsylvania | USA |
| Clearwater Power Co. | USA |
| Clermont County Water Resources Department, Ohio | USA |
| Cleveland Public Power, Ohio | USA |
| Cleveland Utilities, Tennessee | USA |
| Clinton County Electric Cooperative, Illinois | USA |
| Clinton Utilities Board (CUB), Tennessee | USA |
| Clintonville Utilities, Wisconsin | USA |
| Cloverland Electric Cooperative | USA |
| Co-Mo Electric Cooperative, Incorporated, Missouri | USA |
| Coachella Valley Water District, California | USA |
| Coahoma Electric Power Association, Mississippi | USA |
| Coal Creek Utility District, Washington | USA |
| Coast Electric Power Association, Mississippi | USA |
| Coastal Electric Cooperative, Georgia | USA |
| Coastal Electric Cooperative, South Carolina | USA |
| Cobb County Water System, Georgia | USA |
| Cobb Electric Membership Corporation (EMC) | USA |
| Codensa, Colombia | USA |
| Coles-Moultrie Electric Cooperative | USA |
| Collier County Utilities, Florida | USA |
| Collus PowerStream Corporation | CAN |
| Colorado Natural Gas | USA |
| Colorado Springs Utilities, Colorado | USA |
| Colquitt Electric Membership Corporation (EMC) | USA |
| Columbia Basin Electric Cooperative, Incorporated, Oregon | USA |
| Columbia Gas of Kentucky | USA |
| Columbia Gas of Maryland | USA |
| Columbia Gas of Ohio | USA |
| Columbia Gas of Pennsylvania | USA |
| Columbia Gas of Virginia | USA |
| Columbia River PUD, Oregon | USA |
| Columbia Rural Electric Association (REA) | USA |
| Columbia Water Company | USA |
| Columbus And Central Ohio Systems Inc, Ohio | USA |
| Columbus City Utilities, Indiana | USA |
| Columbus Electric Cooperative, Incorporated (CEC) | USA |
| Columbus Light & Water | USA |
| Columbus Water & Light, Wisconsin | USA |
| Columbus Water Works, Georgia | USA |
| Commonwealth Edison (ComEd) | USA |
| Community Electric Cooperative, Virginia | USA |
| Community Utility Billing Services | USA |
| Community Water Company of Green Valley (CWC), Arizona | USA |
| Compass Energy Services, Incorporated | USA |
| Con Edison (ConEd) | USA |
| Concho Valley Electric Cooperative, Texas | USA |
| Connecticut Natural Gas (CNG) | USA |
| Connecticut Water | USA |
| Connersville Utilities, Indiana | USA |
| Connexus Energy | USA |
| Conservice | USA |
| Consolidated Cooperative | USA |
| Consolidated Mutual Water, Colorado | USA |
| Consolidated Public Water Supply District No 1 Of Barton Dade Cedar And Jasper County, Missouri | USA |
| Consolidated Public Water Supply, Missouri | USA |
| Consolidated Utilities Billing and Service, Sacramento County | USA |
| Consolidated Utility District, Tennessee | USA |
| Consolidated Waterworks District No. 1, Louisiana | USA |
| Constellation | USA |
| Consumers Energy | USA |
| Consumers Energy, Iowa | USA |
| Consumers Power Incorporated (CPI) | USA |
| Continental Divide Electric Cooperative (CDEC), New Mexico | USA |
| Contra Costa Water District, California | USA |
| Conway Corporation | USA |
| Conway County Regional Water, Arkansas | USA |
| Cooperative Light And Power, Minnesota | USA |
| Coos-Curry Electric Cooperative | USA |
| Coosa Valley Electric Cooperative | USA |
| Copper Valley Electric Association (CVEA), Alaska | USA |
| Corn Belt Energy Corporation, Illinois | USA |
| Cornwall Electric | CAN |
| Cortez Sanitation District, Colorado | USA |
| Coserv | USA |
| Cotton Electric Cooperative, Oklahoma | USA |
| Council Bluffs Water Works, Iowa | USA |
| County Of Hawaii, Hawaii | USA |
| County of Maui, Hawaii | USA |
| County of Stafford, Virginia | USA |
| County-Wide Utility District, Tennessee | USA |
| Covington Electric Cooperative, Alabama | USA |
| Covington Water District, Washington | USA |
| Coweta County Water and Sewerage Authority, Georgia | USA |
| Coweta-Fayette Electric Membesrship Corporation, Georgia | USA |
| Cowlitz Public Utilities District, Washington | USA |
| Cranberry Township, Pennsylvania | USA |
| Crawford Electric Cooperative Inc, Missouri | USA |
| Crawfordsville Electric Light & Power, Indiana | USA |
| Crescent City Water Sewer Department, California | USA |
| Crescenta Valley Water District, California | USA |
| Crisp County Power Commission, Georgia | USA |
| Crosby Municipal Utility District, Texas | USA |
| Crow Wing Cooperative Power Minnesota | USA |
| Crystal Clear Special Utility District, Texas | USA |
| Crystal Springs Water, Texas | USA |
| Cucamonga Valley Water District, California | USA |
| Cuivre River Electric Cooperative Incorporated, Missouri | USA |
| Culligan Water | USA |
| Cullman Electric Cooperative | USA |
| Cullman Jefferson Counties Gas District, Alabama | USA |
| Cullman Power Board, Alabama | USA |
| Cumberland Electric Membership Corporation | USA |
| Cumberland Falls Highway Water District (CFHWD), Kentucky | USA |
| Cumberland Valley Electric, Incorporated | USA |
| Cuming County Public Power, Nebraska | USA |
| Cunningham Utility District, Tennessee | USA |
| Curry Water Authority Inc, Alabama | USA |
| Cypress Cove Water Supply Corporation, Texas | USA |
| Cypress Forest Public Utility District, Texas | USA |
| Cypress Hill Municipal Utility District #1, Texas | USA |
| DC Water, District of Columbia | USA |
| DEMCO, Louisiana | USA |
| DS&O Electric Cooperative, Inc. | USA |
| DTE Energy | USA |
| Dahlberg Light and Power Company, Wisconsin | USA |
| Dakota Valley Electric Cooperative, North Dakota | USA |
| Dalton Utilities, Georgia | USA |
| Darke Rural Electric Cooperative, Inc., Ohio | USA |
| Davidson Water Inc. | USA |
| Davie County, North Carolina | USA |
| Daviess-Martin County Rural Electric Membership Corporation, Indiana | USA |
| Davison Township, Michigan | USA |
| Dawson Public Power, Nebraska | USA |
| Dayton Power & Light (DP&L) | USA |
| DeKalb County, Georgia | USA |
| Dead River Company | USA |
| Deaf Smith Electric Coop, Texas | USA |
| Decatur County REMC, Indiana | USA |
| Decatur Utilities, Alabama | USA |
| Dedham-Westwood Water District, Massachusetts | USA |
| Deep East Texas Electric Cooperative, Incorporated | USA |
| Delaware County Electric Cooperative Inc, New York | USA |
| Delaware County Water Company, Ohio | USA |
| Delaware Electric Cooperative (DEC), Delaware | USA |
| Delmarva Power | USA |
| Delta Charter Township, Michigan | USA |
| Delta-Montrose Electric Association (DMEA), Colorado | USA |
| Demopolis Water Works And Sewer Board AL, Alabama | USA |
| Denison Municipal Utilities, Iowa | USA |
| Dennis K. Burke Inc. | USA |
| Denton County Fresh Water Supply District | USA |
| Denver Water, Colorado | USA |
| Department Of Public Utilities, South Carolina | USA |
| Department of Water Works, Indiana | USA |
| Deptford Township Municipal Utilities Authority, New Jersey | USA |
| Desert Water Agency | USA |
| Diablo Water District, California | USA |
| Dickson Electric Systems | USA |
| Dinwiddie County Water Authority, Virginia | USA |
| Direct Energy | USA |
| District Of Saanich, Canada | CAN |
| District of North Vancouver, Canada | CAN |
| District of West Vancouver | CAN |
| Diverse Power | USA |
| Dixie Electric Cooperative, Alabama | USA |
| Dixie Electric Memebership Cooperative (DEMCO), Louisiana | USA |
| Dixie Power, Utah | USA |
| Dominion Energy | USA |
| Dominion Energy (Utah, Wyoming, and Idaho) | USA |
| Donala Water And Sanitation District, Colorado | USA |
| Douglas County Public Utility District, Washington | USA |
| Douglas Electric Cooperative, Oregon | USA |
| Douglasville-Douglas County Water and Sewer Authority, Georgia | USA |
| Dublin San Ramon Services District, California | USA |
| Dubois Rural Electric Cooperative, Indiana | USA |
| Duck River Electric Membership Corporation, Tennessee | USA |
| Duke Energy | USA |
| Dunes Community Development District, Florida | USA |
| Dunn Energy Cooperative, Wisconsin | USA |
| Duquesne Light Co. (DLC) | USA |
| Dyersburg Electric System, Tennessee | USA |
| EJ Water Cooperative Inc, Illinois | USA |
| ELK Energy Inc., Ontario | CAN |
| ENMAX | CAN |
| ENSTAR Natural Gas Company | USA |
| ENWIN | CAN |
| EPCOR | CAN |
| ERTH Power | CAN |
| Eagle River Water and Sanitation District, Colorado | USA |
| Easley Central Water District, South Carolina | USA |
| Easley Combined Utilities, South Carolina | USA |
| East Bay Municipal Utility District (EBMUD), California | USA |
| East Cedar Creek Fresh Water Supply District, Texas | USA |
| East Central Electric Cooperative, Oklahoma | USA |
| East Central Energy | USA |
| East Central Special Utility District, Texas | USA |
| East Cherry Creek Valley Water and Sanitation District (ECCV), Colorado | USA |
| East Daviess County Water Association, Kentucky | USA |
| East Mississippi Electric Power Association (EMEPA) | USA |
| East Orange Water Commission, New Jersey | USA |
| East Valley Water District, California | USA |
| East-Central Iowa Rural Electric Cooperative | USA |
| Eastern | USA |
| Eastern Illini Electric Cooperative, Illinois | USA |
| Eastern Maine Electric Cooperative, Maine | USA |
| Eastern Ontario Power | CAN |
| Easton Suburban Water Authority, Pennsylvania | USA |
| Easton Utilities Commission, Maryland | USA |
| Eau Claire Energy Cooperative (ECEC), Wisconsin | USA |
| Edisto Electric Cooperative, Incorporated | USA |
| Edwardsville Water Corporation, Indiana | USA |
| Egyptian Electric Cooperative Association | USA |
| El Dorado Irrigation District, California | USA |
| El Dorado Water Utilities, Arkansas | USA |
| El Paso Water, Texas | USA |
| El Reno, Oklahoma | USA |
| El Toro Water District, California | USA |
| Electric Plant Board, Kentucky | USA |
| Electric Power Board | USA |
| Electrical District No. Two (ED2) | USA |
| Electrical District No.3, Arizona | USA |
| Electricities of North Carolina Incorporated | USA |
| Elexicon Energy | USA |
| Elizabethton Electric Department, Tennessee | USA |
| Elk Grove Water District, California | USA |
| Elk River Municipal Utilities, Minneapolis | USA |
| Elkhart Public Utilities, Indiana | USA |
| Elkton Gas, Maryland | USA |
| Elmhurst Mutual Light & Power Company, Washington | USA |
| Elmira Water Board, New York | USA |
| Elmore Board of Public Affairs, Ohio | USA |
| Elsinore Valley Municipal Water District (EVMWD), California | USA |
| Emerald Coast Utilities Authority, Florida | USA |
| Emerald People's Utility District (EPUD), Oregon | USA |
| Eminence Water Works, Kentucky | USA |
| Empire District Electric Company | USA |
| Empire Electric Association Inc. | USA |
| Enable Gas Transmission LLC, Texas | USA |
| Enbridge | CAN |
| Encore Energy Services | USA |
| EnerStar, Illinois | USA |
| Energir | CAN |
| Energy Center Minneapolis, Minnesota | USA |
| Energy Center San Diego, California (Clearway Energy) | USA |
| Energy Cooperative | USA |
| Energy Harbor LLC, Ohio | USA |
| Energy Management Systems | USA |
| Energy Plus | CAN |
| Energy To Go, Texas | USA |
| Energy West, Montana | USA |
| EnergyUnited | USA |
| Engie Resources | USA |
| Enspire Energy | USA |
| Entegrus | USA |
| Entergy | USA |
| Entrust Energy, Texas | USA |
| Environmental Development Partners, Texas | USA |
| Enwave Seattle | USA |
| Enwave, Illinois | USA |
| Erie County Water Authority, New York | USA |
| Erie County Water Authority, Ohio | USA |
| Erie Water Works, Pennsylvania | USA |
| Erth Solutions, Ontario | CAN |
| Erwin Utilities, Tennessee | USA |
| Escambia River Electric Cooperative Inc, Florida | USA |
| Esparto Community Services District, California | USA |
| Essex Powerlines Corporation, Ontario | CAN |
| Etowah Water and Sewer Authority, Georgia | USA |
| Eufaula Water Works, Alabama | USA |
| Eugene Water And Electric Board, Oregon | USA |
| Evansville Water & Light | USA |
| Evansville Water & Sewer Utility, Indiana | USA |
| Evergy | USA |
| Eversource | USA |
| Excelsior EMC, Georgia | USA |
| Fairbanks Natural Gas LLC, Alaska | USA |
| Fairfax Water, Virginia | USA |
| Fairfield Electric Cooperative, INC, South Carolina | USA |
| Fairport Electric, New York | USA |
| Fall River Rural Electric Cooperative, Idaho | USA |
| Fallbrook Public Utility District, California | USA |
| Fannin County Electric Cooperative, Texas | USA |
| Farmers Electric Cooperative, Iowa | USA |
| Farmers Electric Cooperative, Texas | USA |
| Fauquier County Water And Sanitation Authority, Virginia | USA |
| Fayette County, Georgia | USA |
| Fayette Electric Cooperative, Incorporated | USA |
| Fayetteville Public Utilities (FPU), Tennessee | USA |
| Federated Rural Electric, Minnesota | USA |
| FerrellGas | USA |
| Festival Hydro, Ontario | CAN |
| Files Valley Water Supply Corporation, Texas | USA |
| Fillmore City Utilities, Utah | USA |
| FireSide Natural Gas | USA |
| Firelands Electric Cooperative, Ohio | USA |
| First Choice Power | USA |
| First Electric Cooperative, Arkansas | USA |
| First Utility District of Knox County, Tennessee | USA |
| Fitzgerald Utilities, Georgia | USA |
| Flathead Electric Cooperative, Montana | USA |
| Fleming-Mason Energy, Kentucky | USA |
| Flint Energies | USA |
| Flint Hills Rural Electric Cooperative (FH), Kansas | USA |
| Floresville Electric Light & Power System (FELPS), Texas | USA |
| Florida City Gas | USA |
| Florida Governmental Utility Authority (FGUA), Florida | USA |
| Florida Keys Aqueduct Authority, Florida | USA |
| Florida Keys Electric Cooperative, Florida | USA |
| Florida Power & Light Company (FPL) | USA |
| Florida Public Utilities, Florida | USA |
| Forked Deer Electric Cooperative Inc, Tennessee | USA |
| Forrest City Water Utility, Arkansas | USA |
| Forsyth County, Georgia | USA |
| Fort Bend County Municipal Utility District 122, Texas | USA |
| Fort Bend County Municipal Utility District 25, Texas | USA |
| Fort Bend County Municipal Utility District 50, Texas Municipal District Services | USA |
| Fort Bend County Municipal Utility District No 25, Texas | USA |
| Fort Bend County Municipal Utility District No. 142, Texas Environmental Development Partners | USA |
| Fort Bend County Municipal Utility District No. 143, Texas | USA |
| Fort Bend County Municipal Utility Districts, Texas | USA |
| Fort Bend County Water Control & Improvement District No 2, Texas | USA |
| Fort Collins Loveland Water District & South Fort Collins Sanitation District, Colorado | USA |
| Fort Frances Power Corporation, Ontario | CAN |
| Fort Loudoun Electric Cooperative, Tennessee | USA |
| Fort Mojave Tribal Utilities Authority, Arizona | USA |
| Fort Payne Improvement Authority, Alabama | USA |
| FortisBC | CAN |
| Four Change Energy, Texas | USA |
| Four County Electric Membership Corporation, North Carolina | USA |
| Four Rivers Electric Cooperative, Kansas | USA |
| Fox Crossing, Wisconsin | USA |
| Fox Metro Water Reclamation District, Illinois | USA |
| Frankfort Municipal Utilities, Indiana | USA |
| Frankfort Plant Board, Kentucky (FPB) | USA |
| Franklin County Department of Sanitary Engineering, Ohio | USA |
| Franklin Electric Cooperative, Alabama | USA |
| Franklin PUD, Washington | USA |
| Franklin Rural Electric Cooperative, Iowa | USA |
| Frederick County, Maryland | USA |
| Frederick Water, Virginia | USA |
| Fredericksburg Sewer And Water Authority, Pennsylvania | USA |
| Free State Electric Cooperative, Kansas | USA |
| Freeborn-Mower Cooperative Services, Minnesota | USA |
| Freeport Electric, New York | USA |
| French Broad Electric Membership Corporation, North Carolina | USA |
| Frontier Natural Gas Company, North Carolina | USA |
| Frontier Utilities | USA |
| Fruitland Mutual Water Company, Washington | USA |
| Fry Road Municipal Utility District, Texas | USA |
| Fulton County Finance Department, Georgia | USA |
| Fulton County Rural Electric Membership Corporation, Indiana | USA |
| Fulton County Water, Georgia | USA |
| Fulton Electric System, Kentucky | USA |
| G And W Water Supply Corporation, Texas | USA |
| Gaffney, South Carolina Board of Public Works, South Carolina | USA |
| Gainesville Regional Utilities (GRU), Florida | USA |
| Gallatin Public Utilities, Tennessee | USA |
| Gallia County Rural Water Association, Ohio | USA |
| Galveston County Water Control and Improvement District #1, Texas | USA |
| Gardnerville Water Company, Nevada | USA |
| Garkane Energy, Utah | USA |
| Garland City, Utah | USA |
| Gas South | USA |
| Gazifère, Québec | CAN |
| Georgetown Charter Township, Michigan | USA |
| Georgetown Municipal Water and Sewer Service, Kentucky | USA |
| Georgia Natural Gas (GNG) | USA |
| Georgia Power | USA |
| German Township Water District, Indiana | USA |
| Gexa Energy | USA |
| Gibson County Utility District (GCUD), Tennessee | USA |
| Gibson Electric Membership Corporation | USA |
| Glacier Electric Cooperative (GEC) | USA |
| Glades Electric Cooperative, Inc., Florida | USA |
| Glenwood Energy, Ohio | USA |
| Global Water Resources | USA |
| Goderich Hydro, Ontario | CAN |
| Gold Country Water Company, Nevada | USA |
| Golden State Water Company, California | USA |
| Golden Valley Electric Association (GVEA) | USA |
| Goleta Water District, California | USA |
| Grand Electric Cooperative Inc, South Dakota | USA |
| Grand Haven Board of Light and Power, Michigan | USA |
| Grand Lakes Municipal Utility District, Texas | USA |
| Grand Rapids Public Utilities, Minnesota | USA |
| Grand Strand Water And Sewer Authority, South Carolina | USA |
| Grand Traverse County, Michigan | USA |
| Grand Valley Power (GVP) | USA |
| Granger Hunter Improvement District, Utah | USA |
| Grant County Public Utility District (PUD), Washington | USA |
| Grant County Public Utility District, Washington | USA |
| Grays Harbor Public Utility District (PUD), Washington | USA |
| Grayson Rural Electric Cooperative Corporation, Kentucky | USA |
| Grayson-Collin Electric Cooperative | USA |
| Great Basin Water Co., Maine | USA |
| Great Lakes Energy, Michigan | USA |
| Great Plains Natural Gas Company (GPNG), Minnesota | USA |
| Greater Cincinnati Water Works, Ohio | USA |
| Greater Dickson Gas Authority Dickson TN | USA |
| Greater Johnstown Water Authority, Pennsylvania | USA |
| Greater Minnesota Gas, Inc. | USA |
| Greater Ramsey Water District (GRWD), North Dakota | USA |
| Greater Sudbury Utilities (GSU) | CAN |
| Green Bay Water Utility, Wisconsin | USA |
| Green Island Power Authority, New York | USA |
| Green Mountain Power | USA |
| Green Mountain Water And Sanitation District, Colorado | USA |
| Green Valley Special Utility District, Texas | USA |
| Greene County, Ohio | USA |
| Greeneville Light & Power System (GLPS), Tennessee | USA |
| Greeneville Water Commission, Tennessee | USA |
| Greenfield Municipal Utilities, Indiana | USA |
| Greens Parkway Municipal Utility District, Texas | USA |
| Greenville Utilities, North Carolina | USA |
| Greenville Water | USA |
| Greenville Water Authority, Pennsylvania | USA |
| Greenwood Commissioners of Public Works | USA |
| Greenwood Municipal District Services, Texas | USA |
| Greenwood Utilities (GU), Mississippi | USA |
| Greer Commission of Public Works (CPW) | USA |
| Gresham Municipal Utilities, Wisconsin | USA |
| Grey Forest Utilities | USA |
| GreyStone Power Corporation | USA |
| Grimsby Power, Ontario | CAN |
| Groton Electric Light Department, Massachusetts | USA |
| Groton Utilities, Connecticut | USA |
| Grundy County Rural Electric Cooperative, Iowa | USA |
| Guadalupe Valley Electric Cooperative (GVEC), Texas | USA |
| Guam Power Authority, Guam | USA |
| Guardian Water and Power | USA |
| Guelph Hydro Electric Systems Incorporated, Ontario | CAN |
| Gulf Coast Electric Cooperative | USA |
| Gulf Power | USA |
| Gulfport Mississippi | USA |
| Gunnison County Electric Association (GCEA), Colorado | USA |
| Guthrie County Rural Electric Cooperative, Iowa | USA |
| Gwinnett County Department of Water Resources, Georgia | USA |
| HMW Special Utility District, Texas | USA |
| Habersham Electric Membership Corporation | USA |
| Halifax County, North Carolina | USA |
| Halifax Electric Membership Corporation, North Carolina | USA |
| Halifax Water, Novia Scotia | CAN |
| Hallsdale Powell Utility District, Tennessee | USA |
| Halton Hills Hydro | CAN |
| Hamilton County Electric Cooperative, Texas | USA |
| Hamilton Southeastern Utilities (HSE), Indiana | USA |
| Hammond Water Works, Indiana | USA |
| Hampden Township, Pennsylvania | USA |
| Hampton Roads Sanitation District, Virginia | USA |
| Hampton Roads, Virginia | USA |
| Hampton Shaler Water Authority | USA |
| Hancock Wood Electric Cooperative | USA |
| Hannibal Board of Public Works (HBPW), Missouri | USA |
| Hanover County Public Utilities, Virginia | USA |
| Hardin County Water District Number 2, Kentucky | USA |
| Harpeth Valley Utilities District, Tennessee | USA |
| Harriman Utility Board (HUB) | USA |
| Harris County Environmental Development Partners, Texas | USA |
| Harris County Fresh Water Supply District, Texas | USA |
| Harris County Improvement District 18, Texas | USA |
| Harris County Municipal Utility District | USA |
| Harris County Municipal Utility District #86, Texas | USA |
| Harris County Municipal Utility District 157, Texas Municipal District Services | USA |
| Harris County Municipal Utility District 183, Texas Si Environmental LLC | USA |
| Harris County Municipal Utility District 278, Texas Si Environmental LLC | USA |
| Harris County Municipal Utility District No 120 , Texas Environmental Development Partners | USA |
| Harris County Municipal Utility District No 168, Texas Environmental Development Partners | USA |
| Harris County Municipal Utility District No 26, Texas Municipal Operations And Consulting Inc | USA |
| Harris County Municipal Utility District No 304, Texas | USA |
| Harris County Municipal Utility District No 344, Texas | USA |
| Harris County Municipal Utility District No 53, Texas Municipal Operations And Consulting Inc | USA |
| Harris County Municipal Utility District No 55, Texas | USA |
| Harris County Municipal Utility District No. 249, Texas (Environmental Development Partners) | USA |
| Harris County Utility District No 71, Texas Water District Management | USA |
| Harris County Water Control And Improvement District No 110, Texas | USA |
| Harrison County Development Commission, Mississippi | USA |
| Harrison Rural Electric Association (HREA) | USA |
| Harrison Rural Electrification Association (HREA), Incorporated | USA |
| Harrison Utilities, Wisconsin | USA |
| Harrisonburg Electric Commission (HEC) | USA |
| Hart Electric Membership Corporation | USA |
| Hartselle Utilities, Alabama | USA |
| Harvest Monrovia Water And Sewer Authority, Alabama | USA |
| Hastings Utilities, Nebraska | USA |
| Hawai'i Electric Light | USA |
| Hawaiian Electric (Business) | USA |
| Hawaiian Electric (Consumer) | USA |
| Hawesville Water Works, Kentucky | USA |
| Hays Utility South Corporation | USA |
| Haywood Electric Membership Corporation (EMC), North Carolina | USA |
| Heart of Texas Electric Cooperative Incorporated | USA |
| Heartland Power Cooperative | USA |
| Heartland Rural Electric Cooperative, Kansas | USA |
| Heartland Rural Electric Membership Corporation, Indiana | USA |
| Heber City, Utah | USA |
| Heber Light and Power Company, UT | USA |
| Helix Water District | USA |
| Hendersonville Utility District, Tennessee | USA |
| Hendricks Power Cooperative | USA |
| Henrico County, Virginia | USA |
| Henry County Rural Electric Membership Cooperative (REMC), Indiana | USA |
| Henry County Water Authority, Georgia | USA |
| Heritage Gas | CAN |
| Heritage Propane | USA |
| Hermiston Energy Services, Oregon | USA |
| Hernando County Utilities Department, Florida | USA |
| Hi Desert Water District CA | USA |
| Hiawatha Water Department, Iowa | USA |
| Hibbing Public Utilities, Minnesota | USA |
| High Plains Power Inc, Wyoming | USA |
| High West Energy | USA |
| Highland Sewer and Water Authority, Pennsylvania | USA |
| Highlands Ranch Metro District, Colorado | USA |
| Highline Electric Association | USA |
| Highline Water District, Washington | USA |
| Hilco Electric Cooperative Incorporated, Texas | USA |
| Hill Petroleum, Colorado | USA |
| Hillsboro, Burwood & Thompson's Station (H.B. & T.S.) Utility District, Tennessee | USA |
| Hillsborough County, Florida | USA |
| Hinckley Springs Water, Texas | USA |
| Hingham Municipal Lighting Plant, Massachusetts | USA |
| Hohokam | USA |
| Hoke County Utility Department, North Carolina | USA |
| Holland Board of Public Works (B.P.W), Michigan | USA |
| Holland Charter Township, Michigan | USA |
| Holly Springs Utility Department (HSUD), Mississippi | USA |
| Holly Springs, North Carolina | USA |
| Holmes-Wayne Electric Cooperative Incorporated | USA |
| Holston Electric Cooperative | USA |
| Holy Cross Energy | USA |
| Home Wood Disposal Services Incorporated, Illinois | USA |
| Homer Electric Association, Incorporated | USA |
| Honolulu Board of Water Supply (BWS), Hawaii | USA |
| Hood River Electric Cooperative (HREC), Oregon | USA |
| Hopkinsville Electric System (HES), Kentucky | USA |
| Horry Electric Cooperative | USA |
| Horsepen Bayou Municipal Utility District, Texas | USA |
| Horsham Water & Sewer Authority | USA |
| Houston Public Works, Houston, Texas | USA |
| Howard County, Maryland | USA |
| Howell Oregon Electric Cooperative | USA |
| Hudson Energy | USA |
| Hudson Light and Power | USA |
| Hudson's Bay Company Canada | CAN |
| Humboldt Bay Municipal Water District, California | USA |
| Humboldt Utilities, Tennessee | USA |
| Huntsville Utilities, Alabama | USA |
| Hustisford Utilities, Wisconsin | USA |
| Hydro Hawkesbury, Ontario | CAN |
| Hydro One | CAN |
| Hydro Ottawa | CAN |
| Hydro Québec | CAN |
| Icard Township Water Corporation, North Carolina | USA |
| Idaho County Light and Power Cooperative Association, Incorporated (ICL&P), Idaho | USA |
| Idaho Power | USA |
| Illinois Electric Cooperative, Illinois | USA |
| Immokalee Water & Sewer District, Florida | USA |
| Imperial Irrigation District (IID), California | USA |
| Incline Village General Improvement District Public Works, Nevada | USA |
| Independence Township, Oakland County, Michigan | USA |
| Independent Recycling Services, Illinois | USA |
| Indian Electric Cooperative (IEC) | USA |
| Indian River County, Florida | USA |
| Indian Springs Water, Nevada | USA |
| Indian Wells Valley Water District, California | USA |
| Indiana Utilities Corporation, Indiana | USA |
| Indianapolis Power & Light (IPL) | USA |
| Infinite Energy | USA |
| Inframark | USA |
| Infuse Energy | USA |
| Inland Power and Light Company | USA |
| Inman-Campobello Water District (ICWD), South Carolina | USA |
| InnPower, Ontario | CAN |
| Inside Passage Electric Cooperative (IPEC), Alaska | USA |
| Inter County Energy Cooperative, Kentucky | USA |
| Intercounty Electric Cooperative Association (IECA) | USA |
| Intermountain Gas Company (IGC) | USA |
| Intermountain Rural Electric Association (IREA) | USA |
| Interstate Gas Supply | USA |
| Interstate Municipal Utility District, Texas | USA |
| Iowa Lakes Electric Cooperative (ILEC), Iowa | USA |
| Irvine Ranch Water District, California | USA |
| Irwin Electric Membership Corporation (EMC) | USA |
| Isle of Wight, Virginia | USA |
| Itasca-Mantrap Cooperative Services (IM) | USA |
| Jackson County Public Water Supply District (JCPWSD), Missouri | USA |
| Jackson County Public Water Supply District Number 2, Missouri | USA |
| Jackson County Rural Electric Membership Cooperative (REMC), Indiana | USA |
| Jackson County Water Utility Inc, Indiana | USA |
| Jackson Electric Cooperative, Incorporated, Texas | USA |
| Jackson Electric Cooperative, Wisconsin | USA |
| Jackson Electric Membership Corporation (EMC), Georgia | USA |
| Jackson Energy Authority | USA |
| Jackson Energy Cooperative, Kentucky | USA |
| Jackson Purchase Energy Corporation | USA |
| Jacksonville Energy Authority (JEA), Florida | USA |
| Jasonville Utilities, Indiana | USA |
| Jasper County Rural Electric Membership Corporation, Indiana | USA |
| Jasper Newton Electric Cooperative, Texas | USA |
| Jasper Waterworks and Sewer Board, Incorporated, Alabama | USA |
| Jeff David Electric Co-Op, Inc. (JDEC), Louisiana | USA |
| Jefferson Cocke County Gas Utility District, Tennessee | USA |
| Jefferson County Commission, Alabama | USA |
| Jefferson County Public Utility District (PUD), Washington | USA |
| Jefferson Energy Cooperative | USA |
| Jefferson Parish Department of Water, Louisiana | USA |
| Jefferson Utilities | USA |
| Jefferson Utilities Inc, West Virginia | USA |
| JeffersonWaterAndSewerDistrict, Ohio | USA |
| Jellico Electric And Water Systems, Tennessee | USA |
| Jemez Mountains Electric Cooperative, Incorporated | USA |
| Jenks Public Works Authority (JPWA), Oklahoma | USA |
| Jersey Central Power & Light (First Energy) | USA |
| Jersey City Municipal Utilities Authority | USA |
| Joe Wheeler Electric Membership Corporation (EMC) | USA |
| Johnson County REMC (JCREMC), Indiana | USA |
| Johnson County Special Utility District, Texas | USA |
| Johnston County Public Utilities, North Carolina | USA |
| Joint Municipal Water and Sewer Commission, South Carolina | USA |
| Jonah Water Special Utility District, Texas | USA |
| Jones County Water System, Georgia | USA |
| Jones-Onslow Electric Membership Corporation, North Carolina | USA |
| Jordan Valley Water Conservancy District, Utah | USA |
| Jump River Electric Cooperative, Incorporated, Wisconsin | USA |
| June Lake Public Utility District, California | USA |
| Jurupa Community Services District, California | USA |
| Just Energy | USA |
| KC Electric Association Incorporated | USA |
| KC Water | USA |
| KEM Electric Cooperative, Incorporated, North Dakota | USA |
| Kandiyohi Power Cooperative, Minnesota | USA |
| Kankakee Valley Rural Electric Membership Corporation (REMC), Indiana | USA |
| Kansas City Board of Public Utilities (BPU) | USA |
| Kansas Gas Service | USA |
| Karnes Electric Cooperative, Inc. | USA |
| Kauai County Water Department, Hawaii | USA |
| Kauai Island Utility Cooperative, Hawaii | USA |
| Kaukauna Utilities | USA |
| Kaw Valley Electric | USA |
| Kaysville City, Utah | USA |
| Kearns Improvement District (KID) | USA |
| Kenergy | USA |
| Kennebec Water District, Maine | USA |
| Kentucky Power Company, Ohio | USA |
| Kentucky Utilities (KU) | USA |
| Kerrville Public Utility Board, Texas | USA |
| Keys Energy Services, Florida | USA |
| Kiamichi Electric Cooperative Inc, Oklahoma | USA |
| King County Sewer WA | USA |
| King County Water District No.49, Washington | USA |
| Kingsbridge Municipal Utility District, Texas | USA |
| Kissimmee Utility Authority (KUA), Florida | USA |
| Kit Carson Electric Cooperative, New Mexico | USA |
| Kitchener Utilities, Ontario | CAN |
| Kitchener-Wilmot Hydro, Ontario | CAN |
| Kitsap Public Utility District (KPUD), Washington | USA |
| Kittitas Public Utility District, Washington | USA |
| Klickitat Public Utility District (PUD), Washington | USA |
| Knox Chapman Utility District, Tennessee | USA |
| Knox Energy Cooperative Association Incorporated, Pennsylvania | USA |
| Knoxville Utilities Board (KUB) | USA |
| Kodiak Electric Association Inc, Alaska | USA |
| Kootenai Electric Cooperative, Idaho | USA |
| Kosciusko County Rural Elecric Membership Corporation (REMC) | USA |
| La Plata Electric Association Incorporated (LPEA), Colorado | USA |
| LaGuardo Utility District, Tennessee | USA |
| Laclede Electric Cooperative | USA |
| Lacreek Electric Association Inc, South Dakota | USA |
| Lafayette Utilities System (LUS) | USA |
| Laguna Beach County Water District, California | USA |
| Laguna Madre Water District, Texas | USA |
| Lake Apopka Natural Gas District | USA |
| Lake Arrowhead Community Services District, California | USA |
| Lake Country Power | USA |
| Lake County Department of Utilities, Ohio | USA |
| Lake County, Illinois | USA |
| Lake Grove Water District, Oregon | USA |
| Lake Havasu City, Arizona | USA |
| Lake Hemet Municipal Water District, California | USA |
| Lake Municipal Utility District, Texas | USA |
| Lake Placid Village Inc, New York | USA |
| Lake Region Electric Cooperative (LREC), Minnesota | USA |
| Lake Region Electric Cooperative, Oklahoma | USA |
| Lakehaven Water & Sewer District, Washington | USA |
| Lakehurst Water and Sanitation District, Colorado | USA |
| Lakeland Electric | USA |
| Lakeland Power | CAN |
| Lakeview Light And Power (LLP), Washington | USA |
| Lakewood Township Municipal Utilities Authority, New Jersey | USA |
| Lamar Electric Cooperative, Texas | USA |
| Lancaster Area Sewer Authority (LASA), Pennsylvania | USA |
| Lancaster County Natural Gas Authority, South Carolina | USA |
| Lane Electric Cooperative, Oregon | USA |
| Langham Creek Utility District, Texas | USA |
| Lansing Board of Water and Light, Michigan | USA |
| Las Vegas Valley Water District | USA |
| Las Virgenes Municipal Water District, California | USA |
| Lassen Municipal Utility District, California | USA |
| Lauderdale County Water System, Tennessee | USA |
| Laurel County Water District No 2, Kentucky | USA |
| Laurens Commission Of Public Works, South Carolina | USA |
| Laurens County Water And Sewer, South Carolina | USA |
| Laurens Electric Cooperative (LEC), South Carolina | USA |
| Lawrenceburg Municipal Utilities, Indiana | USA |
| Lawrenceburg Utility Systems (LUS), Tenneessee | USA |
| Leavenworth Waterworks Department, Kansas | USA |
| Lebanon Water Works, Kentucky | USA |
| Lee County Electric Cooperative, Florida | USA |
| Lee County Utilities, Florida | USA |
| Lehi City, Utah | USA |
| Lehigh County Authority, Pennsylvania | USA |
| Leitchfield Water, Sewer, and Gas System, Kentucky | USA |
| Lenoir City Utilities Board (LCUB), Tennessee | USA |
| Lewis County Public Utility District, Washington | USA |
| Lewis County Rural Electric Cooperative, Missouri | USA |
| Lexington Fayette County Government, Kentucky | USA |
| Liberty Power | USA |
| Liberty Utilities | USA |
| Licking Valley Rural Electric Cooperative Corporation, Kentucky | USA |
| Lincoln City Water Department, Arkansas | USA |
| Lincoln County Board Of Public Utilities, Tennessee | USA |
| Lincoln County Power District No. 1, Nevada | USA |
| Lincoln Electric Cooperative Incorporated, Montana | USA |
| Lincoln Electric System (LES), Nebraska | USA |
| Linda County Water District, California | USA |
| Lindale Rural Water Supply, Texas | USA |
| Linn County Rural Electric Cooperative, Iowa | USA |
| Little Ocmulgee Electric Membership Corporation, Georgia | USA |
| Little River Electric Cooperative Inc, South Carolina | USA |
| Littleton Electric Light and Water Departments (LELWD), Massachusetts | USA |
| Littleton Water and Light Department | USA |
| Lockhart Power Company Incorporated, South Carolina | USA |
| Logan County Electric Cooperative, Ohio | USA |
| Lonaconing Water Company, Maryland | USA |
| London Hydro | CAN |
| Lone Star Energy LLC, Texas | USA |
| Lorain-Medina Rural Electric Cooperative, Ohio | USA |
| Los Angeles County Waterworks Districts, California | USA |
| Los Angeles Department of Water and Power (LADWP) | USA |
| Loudon Utilities Board, Tennessee | USA |
| Louisville Gas and Electric (LGE) | USA |
| Louisville Water | USA |
| Loup Power District | USA |
| Lowell Light And Power, Michigan | USA |
| Lower Bucks County Joint Municipal Authority, Pennsylvania | USA |
| Lower Colorado River Authority, Texas | USA |
| Lower Rio Grande Public Water Works Authority, New Mexico | USA |
| Lower Valley Energy | USA |
| Lower Valley Water District, Texas | USA |
| Lower Yellowstone Rural Electric Cooperative (LYREC), Montana | USA |
| Loxahatchee River District, Florida | USA |
| Lubbock Power & Light (LPL) | USA |
| Lumbee River Electric Membership Corporation (EMC) | USA |
| Lynches River Electric Cooperative Inc, South Carolina | USA |
| Lynnwood, Washington | USA |
| Lyntegar Electric Cooperative, Incorporated | USA |
| Lyon Lincoln Electric Cooperative, Minnesota | USA |
| M. Marlon Ivy and Associates Inc., Texas | USA |
| MC Squared Energy Services LLC | USA |
| MJM Electric Cooperative Inc, Illinois | USA |
| Macon Electric Cooperative | USA |
| Macon Municipal Utilities, Missouri | USA |
| Macon Water Authority, Georgia | USA |
| Madison Gas and Electric (MGE) | USA |
| Madison Suburban Utility District, Tennessee | USA |
| Magic Valley Electric Cooperative, Texas (MVEC) | USA |
| Magna Water | USA |
| Magnolia Electric Power (MEP), Mississippi | USA |
| Magnolia Water Utility Operating Company LLC, Missouri | USA |
| Maine Natural Gas | USA |
| Maine Water | USA |
| Mallory Valley Utility District, Tennessee | USA |
| Mammoth Community Water District, California | USA |
| Manatee County, Florida | USA |
| Manitoba Hydro | CAN |
| Manitowoc Public Utilities | USA |
| Manor Township Joint Municipal Authority, Pennsylvania | USA |
| Mansfield Energy | USA |
| Mansfield Municipal Electric Department, Massachusetts | USA |
| Maquoketa Valley Electric Cooperative, Iowa | USA |
| Marias River Electric Cooperative (MRE), Montana | USA |
| Marietta Power and Water, Georgia | USA |
| Marin Municipal Water District, California | USA |
| Marina Coast Water District, California | USA |
| Marion Municipal Utilities, Indiana | USA |
| Maritime Electric | CAN |
| Marlboro Electric Cooperative Inc, South Carolina | USA |
| Marshall County Board Of Public Utilities, Tennessee | USA |
| Marshall County REMC, Indiana | USA |
| Marshall Dekalb Electric Cooperative, Alabama | USA |
| Marshall Municipal Utilities, Minnesota (MMU) | USA |
| Marshfield Utilities, Wisconsin | USA |
| Martin County, Florida | USA |
| Mason County Public Utility District (PUD) 1, Washington | USA |
| Mason County Public Utility District (PUD) 3, Washington | USA |
| Mason Creek Utility District (MCUD), Texas | USA |
| Matanuska Electric Association (MEA) | USA |
| Maui Electric | USA |
| Mayfield Electric and Water Systems, Kentucky | USA |
| Maysville Utility Commission, Kentuky | USA |
| Mc Lean Electric Cooperative (MEC), North Dakota | USA |
| McAllen Public Utility | USA |
| McCreary County Water District, Kentucky | USA |
| McDonough Power Cooperative, Illinois | USA |
| McKenzie County, North Dakota | USA |
| McKenzie Electric Cooperative, North Dakota | USA |
| McKinleyville Community Services District, California | USA |
| McMinnville Electric System (MES), Tennessee | USA |
| McMinnville Water and Light, Oregon | USA |
| McPherson Board of Public Utilities | USA |
| Meade County (RECC), Kentucky | USA |
| Mecklenburg Electric Cooperative, Virginia | USA |
| Medford Electric Utility, Wisconsin | USA |
| Medford Water Commission, Oregon | USA |
| Medina County, Ohio | USA |
| Medina Electric Cooperative, Incorporated, Texas | USA |
| Meeker Cooperative Light And Power Association, Minnesota | USA |
| Memorial Municipal Utility District, Texas | USA |
| Memorial Villages Water Authority, Texas | USA |
| Memphis Light, Gas and Water Division (MLGW) | USA |
| Menoken Water District, Colorado | USA |
| Merced Irrigation District (MID) | USA |
| Meridian Service Metropolitan District, Colorado | USA |
| Meriwether Lewis Electric Cooperative, Tennessee | USA |
| Merrillville Conservancy District, Indiana | USA |
| Mesa Water District, California | USA |
| Metro Water Services, Tennessee | USA |
| Metropolitan District Commission, Connecticut | USA |
| Metropolitan Edison (Met-Ed) (First Energy) | USA |
| Metropolitan St. Louis Sewer District | USA |
| Metropolitan Utilities District | USA |
| Metropolitan Water District, Arizona | USA |
| Miami-Dade County Water & Sewer Department, Florida | USA |
| Michigan Gas And Electric, Michigan | USA |
| Michigan Gas Utilities | USA |
| Mid Peninsula Water District, California | USA |
| Mid South Synergy Incorporated | USA |
| Mid State Electric Cooperative Incorporated, Oregon | USA |
| Mid West Electric Incorporated, Ohio | USA |
| Mid-Carolina Electric Cooperative (MCEC), Incorporated | USA |
| MidAmerican Energy Company | USA |
| MidAmerican Energy Services, LLC | USA |
| MidWest Electric Cooperative Corporation, Nebraska | USA |
| MidWest Energy & Communications | USA |
| Middle Tennessee Electric Membership Corporation (MTEMC) | USA |
| Middle Tennessee Natural Gas Utility District | USA |
| Middleborough Gas and Electric Department, Massachusetts | USA |
| Middlesex Water Company, New Jersey | USA |
| Midland Power Utility Corporation | CAN |
| Midvale City, Utah | USA |
| Midwest Energy, Inc. | USA |
| Midwest Natural Gas | USA |
| Milcrofton Utility District, Tennessee | USA |
| Military Highway Water Supply Corporation, Texas | USA |
| Mill Creek Water Reclamation District, Illinois | USA |
| Millcreek Township | USA |
| Mille Lacs Energy Cooperative (MLEC), Minnesota | USA |
| Milton Hydro | USA |
| Minnesota Energy Resources | USA |
| Minnesota Power | USA |
| Minnesota Valley Cooperative Light And Power Association (MV), Minnesota | USA |
| Minnesota Valley Electric Cooperative (MVEC) | USA |
| Minol Direct, Texas | USA |
| Mission Bend Municipal Utility District | USA |
| Mission Springs Water District, California | USA |
| Mission Valley Power | USA |
| Mississippi Power | USA |
| Missoula Electric Cooperative Incorporated, Montana | USA |
| Missouri Rural Electric Cooperative, Missouri | USA |
| Mitchell | USA |
| Mobile Area Water & Sewer System, Alabama | USA |
| Mobile County Water Sewer and Fire Protection Authority (MWCS), Alabama | USA |
| Modern Electric Water Company, Washington | USA |
| Modesto Irrigation District | USA |
| Mohave Electric Cooperative | USA |
| Mohawk Municipal Electric Department, New York | USA |
| Mohawk Valley Water Authority, New York | USA |
| Mon Power (First Energy) | USA |
| Monroe County Electric Co-Operative Inc, Illinois | USA |
| Monroe County Water Authority, New York | USA |
| Monroe Township Utility Department | USA |
| Monroeville Municipal Authority, Pennsylvania | USA |
| Montana-Dakota Utilities Company (MDU) | USA |
| Monte Vista Water District, California | USA |
| Montecito Water District, California | USA |
| Montgomery County Municipal Utility District | USA |
| Montgomery County Water Control And Improvement District, Texas | USA |
| Montgomery County, North Carolina | USA |
| Montgomery County, Ohio | USA |
| Montgomery Township Municipal Sewer Authority, Pennsylvania | USA |
| Montgomery Water Works & Sanitary Sewer Board, Alabama | USA |
| Moon Lake Electric Association, Utah | USA |
| Mor-Gran-Sou Electric Cooperative Incorporated, North Dakota | USA |
| Moreau-Grand Electric Cooperative, South Dakota | USA |
| Morehead City, North Carolina Inc. | USA |
| Morgan County Rural Electric Association, Colorado | USA |
| Morgantown Utility Board (MUB), West Virginia | USA |
| Morristown Utility Systems (MUS), Tennessee | USA |
| Morrisville Water and Light, Vermont | USA |
| Moulton Niguel Water District | USA |
| Mount Pleasant Waterworks, South Carolina | USA |
| Mount Pleasant, Texas | USA |
| Mount Werner Water District, Colorado | USA |
| Mountain City, Tennessee | USA |
| Mountain Parks Electric Inc, Colorado | USA |
| Mountain View Electric Association Incorporated, Colorado | USA |
| Mountaineer Gas Company, West Virginia | USA |
| Mountrail-Williams Electric Cooperative (MWEC) | USA |
| Mt Sterling Water And Sewer System, Kentucky | USA |
| Muhlenberg Township Authority, Pennsylvania | USA |
| Mukilteo Water and Wastewater District, Washington | USA |
| Multifamily Utility Company | USA |
| Muncie Sanitary District, Indiana | USA |
| Municipal Authority Borough of Lewistown, Pennsylvania | USA |
| Municipal Authority of Westmoreland County, Pennsylvania. | USA |
| Municipal Utilities Board of the City of Albertville, Alabama | USA |
| Municipality Of Middlesex Centre, Canada | CAN |
| Muscatine Power and Water, Iowa | USA |
| Muscle Shoals Electric Board | USA |
| Mustang Special Utility District | USA |
| My City Water and Wastewater Utilities, Florida | USA |
| Myoma Dunes Water Company, California | USA |
| NEC Co-op Energy, Texas | USA |
| NRG Energy | USA |
| NTherm LLC, Colorado | USA |
| NV Energy | USA |
| NW Natural (NWN) | USA |
| Narragansett Bay Commission, Rhode Island | USA |
| Nashville Electric Service (NES) | USA |
| Nassau-Amelia Utilities, Florida | USA |
| Natchez Water Works, Mississippi | USA |
| National Exemption Service (NES) | USA |
| National Fuel | USA |
| National Fuel Resources, Inc. | USA |
| National Grid | USA |
| Nationwide Energy Partners, Ohio | USA |
| Natural Energy Utility Corporation, Kentucky | USA |
| Navajo Tribal Utility Authority | USA |
| Navarro County Electric Cooperative | USA |
| Navopache Electric Cooperative (NEC) | USA |
| Nebraska Public Power District | USA |
| Neighborhood Power Corporation, Hawaii | USA |
| Nephi City Public Works, Utah | USA |
| Nespelem Valley Electric, Washington | USA |
| Nevada Irrigation District, California | USA |
| New Castle County, Delaware | USA |
| New Glarus Utilities, Wisconsin | USA |
| New Hampshire Electric Cooperative | USA |
| New Jersey Natural Gas | USA |
| New London Utilities, Wisconsin | USA |
| New Mexico Gas Company | USA |
| New Prague Utilities Commission, Minnesota | USA |
| New Richmond Utilities, Wisconsin | USA |
| New River Light and Power, North Carolina | USA |
| New York City Water Board | USA |
| New York City Water Board AMR | USA |
| New York Power Authority, New York | USA |
| New York State Electric and Gas (NYSEG) | USA |
| Newberry County Water and Sewer Authority (NCWSA), South Carolina | USA |
| Newberry Electric Cooperative Incorporated, South Carolina | USA |
| Newfoundland Power | CAN |
| Newmarket Hydro | CAN |
| Newnan Utilities, Georgia | USA |
| Newport Municipal Utility District, Texas | USA |
| Newport News Waterworks | USA |
| Newport Utilities (NU), Tennessee | USA |
| Newton County Water and Sewerage Authority (NCWSA), Georgia | USA |
| Nextera Energy Services | USA |
| Niagara Peninsula Energy (NPEI), Ontario | CAN |
| Niagara on-the-Lake Hydro, Ontario | CAN |
| Nicor Gas | USA |
| Nine Star Connect, Indiana | USA |
| Nobles Cooperative Electric, Minnesota | USA |
| Nodak Electric Cooperative | USA |
| Nolin Rural Electric Cooperative | USA |
| Nordic Solar HoldCo LLC, Minnesota | USA |
| Norris Electric Cooperative, Illinois | USA |
| Norris Public Power District, Nebraska | USA |
| North Alabama Gas District | USA |
| North Alamo Water Supply Corporation (NAWSC) | USA |
| North Arkansas Electric Cooperative (NAEC) | USA |
| North Attleborough Electric Department , Massachusetts | USA |
| North Bay Hydro Community Power, Ontario | CAN |
| North Branch Water And Light, Minnesota | USA |
| North Central Electric Cooperative, North Dakota | USA |
| North Central Electric Cooperative, Ohio | USA |
| North City Water District, Washington | USA |
| North Coast County Water District, California | USA |
| North East Mississippi Electric Power Association | USA |
| North East Ohio Regional Sewer District | USA |
| North East Oklahoma Electric Cooperative | USA |
| North Georgia Electric Membership Corporation (EMC) | USA |
| North Green MUD, Texas | USA |
| North Grenville, Ontario | CAN |
| North Hudson Sewerage Authority, New Jersey | USA |
| North Itasca Electric, Minnesota | USA |
| North Kansas City Utilities, Kansas | USA |
| North Marin Water District, California | USA |
| North Ogden City, Utah | USA |
| North Parkland Power, Canada | CAN |
| North Shore Gas | USA |
| North Table Mountain Water And Sanitation District, Colorado | USA |
| North Weld County Water District, Colorado | USA |
| North West Harris County Municipal Utility District 6, Texas | USA |
| NorthWest Territories Power Corporation, Canada | CAN |
| NorthWestern Energy | USA |
| Northampton Borough Municipal Authority, Pennsylvania | USA |
| Northampton Bucks County Municipal Authority, Pennsylvania | USA |
| Northcentral Electric Power Association, Pennsylvania | USA |
| Northeast Ohio Natural Gas Corporation | USA |
| Northeast Oklahoma Public Facilities Authority, Oklahoma | USA |
| Northeast Sammamish Sewer and Water District, Washington | USA |
| Northeastern Rural Electric Membership Corporation (REMC), Indiana | USA |
| Northern Electric Cooperative, South Dakota | USA |
| Northern Indiana Public Service Company (NIPSCO) | USA |
| Northern Kentucky Water District, Kentucky | USA |
| Northern Lights, Inc. | USA |
| Northern Natural Gas, Nebraska | USA |
| Northern Neck Electric Cooperative | USA |
| Northern Ohio Rural Water, Ohio | USA |
| Northern Plains Electric Cooperative, North Dakota | USA |
| Northern Rio Arriba Electric (NORA Electric Co-Op), New Mexico | USA |
| Northern Virginia Electric Cooperative (NOVEC) | USA |
| Northern Wasco County People’s Utility District, Oregon | USA |
| Northland Utilities, Northwest Territories | CAN |
| Northshore Utility District | USA |
| Northwest Harris County MUD No. 15, Texas | USA |
| Northwest Harris County Municipal Utility District 5, Texas | USA |
| Northwest Park Municipal Utility District (MUD), Texas (Si Environmental) | USA |
| Northwestern Electric Cooperative (NWEC), Incorporated | USA |
| Northwestern Rural Electric Cooperative, Pennsylvania | USA |
| Northwestern Water & Sewer District, Ohio | USA |
| Norval Electric Cooperative, Montana | USA |
| Nottingham Country Municipal Utility District, Texas | USA |
| Nova Scotia Power | CAN |
| Nueces Electric Cooperative, Texas | USA |
| O'Connor Utility District, Tennessee | USA |
| Oahe Electric | USA |
| Oak Lodge Water District, Oregon | USA |
| Oak Ridge Utility District (ORUD), Tennessee | USA |
| Oakdale Electric Cooperative, Wisconsin | USA |
| Oakland County, Michigan | USA |
| Oakmont Water Authority, Pennsylvania | USA |
| Oakville Hydro, Ontario | CAN |
| Oconee Electric Member Corporation, Georgia | USA |
| Oconto Electric Cooperative, Wisconsin | USA |
| Ogden City Utilities, Utah | USA |
| Ohio County Water District, Kentucky | USA |
| Ohio Edison (First Energy) | USA |
| Ohio Gas Company | USA |
| Oildale Mutual Water Company, California | USA |
| Okaloosa County Water & Sewer, Florida | USA |
| Okaloosa Gas District | USA |
| Okanogan County Electric Cooperative, Washington | USA |
| Okanogan County Public Utility District (PUD) | USA |
| Okefenoke Rural Electric Membership Corporation | USA |
| Oklahoma Electric Cooperative (OEC) | USA |
| Oklahoma Gas & Electric (OG&E) | USA |
| Oklahoma Natural Gas | USA |
| Olivenhain Municipal Water District, California | USA |
| Olympic View Water And Sewer District, Washington | USA |
| Omaha Public Power District (OPPD) | USA |
| OneOk Gas Transportation, Oklahoma | USA |
| OnePoint Technologies, Georgia | USA |
| Oneida, Tennessee | USA |
| Oneonta Utilities Board, Alabama | USA |
| Onondaga County Water Authority | USA |
| Onslow Water and Sewer Authority (ONWASA) | USA |
| Ontario Municipal Utilities Company | USA |
| Ontonagon Rural Electrification Association (REA), Michigan | USA |
| Opelika Power Services | USA |
| Orange & Rockland | USA |
| Orange County REMC and Orange County Fiber | USA |
| Orange Water and Sewer Authority (OWASA) | USA |
| Orange-Alamance Water System Incorporated | USA |
| Orangeville Hydro, Ontario | CAN |
| Orchard Dale Water District, California | USA |
| Oregon City, Oregon | USA |
| Oregon Trail Electric Cooperative, Alabama | USA |
| Orillia Power Corporation | CAN |
| Orlando Utilities Commission (OUC) | USA |
| Oro Valley Water Utilities, Arizona | USA |
| Orrville Utilities | USA |
| Orwell Natural Gas Co., Ohio | USA |
| Oshawa Public Utilities Commission (OPUC) | CAN |
| Osterman Propane | USA |
| Otay Water District, California | USA |
| Otero County Electric Cooperative, Incorporated | USA |
| Otsego Electric Cooperative, Inc., New York | USA |
| Ottawa River Power Corp, Canada | CAN |
| Otter Tail Power Company | USA |
| Overton Power District No 5, Nevada | USA |
| Owatonna Public Utilities, Minnesota | USA |
| Owen Electric Cooperative, Kentucky | USA |
| Owensboro Municipal Utilities, Kentucky | USA |
| Oxford Water Works & Sewer Board | USA |
| Ozark Border Electric Cooperative | USA |
| Ozarks Electric Cooperative | USA |
| PASCOAG Utility District | USA |
| PPL Electric Utilities | USA |
| PSEG Long Island | USA |
| PUC Services Incorporated | CAN |
| PWC, North Carolina | USA |
| Pacific County Public Utility District (PUD), WA | USA |
| Pacific Gas and Electric (PG&E) | USA |
| Pacific Northern Gas Limited (PNG) | CAN |
| Pacific Power | USA |
| Padre Dam Municipal Water District, California | USA |
| Paducah Power System (PPS) | USA |
| Paducah Water, Kentucky | USA |
| Pagosa Area Water and Sanitation District, Colorado | USA |
| Palatka Gas Authority, Florida | USA |
| Palm Beach County, Florida | USA |
| Palmdale Water District | USA |
| Palmetto Electric Cooperative Inc., South Carolina | USA |
| Panama City Beach, Florida | USA |
| Panola-Harrison Electric Cooperative, Texas | USA |
| Paraco Gas | USA |
| Paragould Light Water and Cable (PLWC) | USA |
| Paris Board of Public Utilities, Tennessee | USA |
| Park Electric Cooperative Inc. | USA |
| Park Water Company, California | USA |
| Parker Water and Sanitation District, Colorado | USA |
| Parkland Light & Water Company | USA |
| Parkway Utility District, Texas | USA |
| Pasco County, Florida | USA |
| Passaic Valley Water Commission | USA |
| Paulding County, Georgia | USA |
| Paulding Putnam Electric Cooperative, Ohio | USA |
| Pea River Electric Cooperative, Alabama | USA |
| Peabody Municipal Light Plant | USA |
| Peace River Electric Membership Cooperative, Inc. | USA |
| Pearl River Valley Electric Power Association, Mississippi | USA |
| Pecan Grove Municipal Utility District, Texas Environmental Development Partners | USA |
| Pedernales Electric Cooperative (PEC) | USA |
| Pemiscot-Dunklin Electric Cooperative Inc, Missouri | USA |
| Pend Oreille County Public Utility District (PUD), Washington | USA |
| Penelec (First Energy) | USA |
| Peninsula Energy Services Company (PESCO Energy), Florida | USA |
| Peninsula Light Company | USA |
| Penn Power (First Energy) | USA |
| Pennichuck | USA |
| Pennyrile Electric | USA |
| Pensacola Energy, Florida | USA |
| People's Energy Cooperative, Minnesota | USA |
| Peoples | USA |
| Peoples Gas | USA |
| Pepco | USA |
| Pere Marquette Charter Township, Michigan | USA |
| Perennial Public Power District, Nebraska | USA |
| Peru Utilities, Indiana | USA |
| Petersburg Utility and Harbor, Alaska | USA |
| Petit Jean Electric Cooperative | USA |
| Philadelphia Electric Company (PECO) | USA |
| Philadelphia Gas Works (PGW) | USA |
| Pickwick Electric Cooperative (PEC), Tennessee | USA |
| Pico Water District, California | USA |
| Piedmont Electric Membership Corporation | USA |
| Piedmont Natural Gas | USA |
| Pike Natural Gas Company, Ohio | USA |
| Pinedale Natural Gas | USA |
| Pinellas County Utilities, Florida | USA |
| Pineville Communication Systems and Electric Company, North Carolina | USA |
| Pioneer Electric Cooperative Inc., Alabama | USA |
| Pioneer Electric Cooperative, Ohio | USA |
| Pitt And Greene Electric Membership Corporation, North Carolina | USA |
| Pittsburgh Water & Sewer Authority, Pennsylvania | USA |
| Pittsfield Charter Township, Michigan | USA |
| Placer County Water Agency, California (PCWA) | USA |
| Plainfield Charter Township, Michigan | USA |
| Plaquemines Parish Water Department, Louisiana | USA |
| Plateau Electric Cooperative, Tennessee | USA |
| Platte Clay Electric Cooperative, Missouri | USA |
| Plumas-Sierra Rural Electric Cooperative (PSREC), California | USA |
| Pluris Holdings, LLC | USA |
| Plymouth Utilities, Wisconsin | USA |
| Pocomoke City, Maryland | USA |
| Pointe Coupee Electric Membership Corporation, Louisiana | USA |
| Polk County Utilities, Florida | USA |
| Polk-Burnett Electric Cooperative, Wisconsin | USA |
| Port Neches, Texas | USA |
| Port Washington, Wisconsin | USA |
| Portage County, Ohio | USA |
| Porter Special Utility District TX | USA |
| Portland General Electric (PGE) | USA |
| Portland Water District, Maine | USA |
| Potomac Edison (First Energy) | USA |
| Poudre Valley Rural Electric Association (REA), Colorado | USA |
| Powder River Energy Corporation | USA |
| Powdersville Water, South Carolina | USA |
| Powell Valley Electric Cooperative (PVEC) | USA |
| Powell-Clinch Utility District, Tennessee | USA |
| Power New Mexico (PNM) | USA |
| Prairie Grove Water Department, Arkansas | USA |
| Prairie Land Electric Cooperative Incorporated, Kansas | USA |
| Premium Waters Inc, North Dakota | USA |
| Presque Isle Electric And Gas MI | USA |
| Presque Isle Utilities District, Maine | USA |
| Prestonburg City's Utility Commission, Kentucky | USA |
| Price Electric Cooperative, Wisconsin | USA |
| Prince George Electric Cooperative, Virginia | USA |
| Prince William County Service Authority, Virginia | USA |
| Princeton Municipal Light Department (PMLD), Massachusetts | USA |
| Princeton Public Utilities, Minnesota | USA |
| ProEnergy Partners | USA |
| Proliance | USA |
| Providence Water Rhode Island | USA |
| Provision Power And Gas LLC, Texas | USA |
| Public Service Enterprise Group (PSE&G) | USA |
| Public Utility District No. 1 of Skamania County, Washington | USA |
| Public Water Supply District #2 of St Charles County, Missouri | USA |
| Public Water Supply District No. 9, Missouri | USA |
| Puget Sound Energy (PSE) | USA |
| Pulaski Electric System (PES), Tennessee | USA |
| Pulse Power | USA |
| Putnam Public Service District (PSD), West Virginia | USA |
| Quadlogic Meters Canada Inc, Canada | CAN |
| Quadvest Water and Sewer Utility | USA |
| REA Energy Cooperative, Pennsylvania | USA |
| Raccoon Valley Electric Cooperative | USA |
| Raft River Electric | USA |
| Raintree Waste, Georgia | USA |
| Raleigh Water District, Oregon | USA |
| Ralls County Electric Cooperative, Missouri | USA |
| Rancho California Water District, California | USA |
| Randolph Electric Membership Corporation, North Carolina | USA |
| Rappahannock Electric Cooperative (REC) | USA |
| Ravalli Electric Cooperative, Montana | USA |
| Rayford Road Municipal Utility District, Texas | USA |
| RayleEMC | USA |
| Raytown Water Company, Missouri | USA |
| Reading Area Water Authority, Pennsylvania | USA |
| Reading Municipal Light Department (RMLD), Massachusetts | USA |
| Red River Valley Rural Electric | USA |
| Redbank Valley Municipal Authority (RVMA), Pennsylvania | USA |
| Redwood Electric Cooperative (REC) | USA |
| Reedsburg Utility Commision, Wisconsin | USA |
| Region of Peel | USA |
| Regional Municipality Of Durham, Canada | USA |
| Regional Water Authority, Massachusetts | USA |
| Reid Road Mud, Texas | USA |
| Reliance Home Comfort | CAN |
| Reliant Energy | USA |
| Remington Municipal Utility District, Texas | USA |
| Renfrew Hydro, Ontario | CAN |
| Renn Road Municipal Utility District, Texas | USA |
| Republic Services | USA |
| Reynoldsburg Water Department, Ohio | USA |
| Rialto Water Services, California | USA |
| Rice Lake Utilities | USA |
| Richmond Power and Light, Indiana | USA |
| Richmond Utilities, Kentucky | USA |
| Rideau St. Lawrence Distribution Inc., Ontario | CAN |
| Ridgewood City Water Department, New Jersey | USA |
| Rincon del Diablo Municipal Water District, California | USA |
| Rio Grande Electric Cooperative, Inc., Texas | USA |
| Ripley Gas Water & Wastewater | USA |
| River Falls Municipal Utilities, Wisconsin | USA |
| River Parish Disposal | USA |
| Riverland Energy Cooperative, Wisconsin | USA |
| Riverton City, Utah | USA |
| Riviera Utilities, Alabama | USA |
| Rizzo Environmental Services, Michigan | USA |
| Roanoke Gas Company, Virginia | USA |
| Roanoke Rapids Sanitary District, North Carolina | USA |
| Roats Water System, Oregon | USA |
| Roberts Creek Water District, Oregon | USA |
| Rochelle Municipal Utilities (RMU), Illinois | USA |
| Rochester Gas and Electric (RG&E) | USA |
| Rochester Public Utilities (RPU), Minnesota | USA |
| Rock Energy Cooperative, Wisconsin | USA |
| Rock River Water Reclamation District, Illinois | USA |
| Rockdale Water Resources, Georgia | USA |
| Rockett Special Utility District, Texas | USA |
| Rockingham County, Virginia | USA |
| Rockwood Water Sewer Gas, Tennessee | USA |
| Rocky Mountain Power | USA |
| Rogers Water Utilities (RWU), Arkansas | USA |
| Rogue Valley Sewer Services, Oregon | USA |
| Rolling Hills Electric Cooperative, Kansas | USA |
| Roosevelt Public Power District, Nebraska | USA |
| Rosamond Community Services District, California | USA |
| Roseau Electric Cooperative, Incorporated, Minnesota | USA |
| Ross County Water Company, Ohio | USA |
| Roughrider Electric Cooperative | USA |
| Rowland Water District, California | USA |
| Roy City Utilities, Utah | USA |
| Royse City, Texas | USA |
| Rubio Cañon Land & Water Association, California | USA |
| Runestone Electric Association (REA), Minnesota | USA |
| Rural Lorain County Water Authority (RLCWA), Ohio | USA |
| RushShelby Energy, Indiana | USA |
| Rushville City Utilities, Indiana | USA |
| Russellville Whitesburg Utility District, Tennessee | USA |
| Rutherford Electric Membership Corporation, North Carolina | USA |
| SCANA Energy | USA |
| SECO Energy, Florida | USA |
| SUEZ Water | USA |
| Sac Osage Electric Cooperative Inc, Missouri | USA |
| Sacramento Municipal Utility District (SMUD) | USA |
| Sacramento Suburban Water District | USA |
| Saint John Energy | CAN |
| Saint Paul Regional Water Services | USA |
| Salem Electric | USA |
| Salt Lake City Public Utilities, Utah | USA |
| Salt River Electric | USA |
| Salt River Project (SRP) | USA |
| Sam Houston Electric Cooperative, Texas | USA |
| Sammamish Plateau Water, Washington | USA |
| San Antonio Water System, Texas | USA |
| San Bernard Electric Cooperative (SBEC), Texas | USA |
| San Diego Gas & Electric (SDGE) | USA |
| San Dieguito Water District, California | USA |
| San Francisco Public Utilities, California | USA |
| San Gabriel Valley Water Company CA | USA |
| San Isabel Electric Association (SIEA) | USA |
| San Jose Water Company | USA |
| San Juan Water District, California | USA |
| San Lorenzo Valley Water District, California | USA |
| San Luis Valley Rural Electric Cooperative (REC), Colorado | USA |
| San Miguel Power Association, Colorado | USA |
| San Patricio Electric Cooperative (SPEC), Texas | USA |
| Sand Mountain Electric Cooperative | USA |
| Sandpiper Energy, Maryland | USA |
| Sandy Springs Water District | USA |
| Sanford Water District, Maine | USA |
| Sangamon Valley Public Water District, Illinois | USA |
| Sangre De Cristo Electric Association | USA |
| Sanitation District Number One (SD1), Kentucky | USA |
| Santa Clarita Water Division, California | USA |
| Santa Fe Irrigation District, California | USA |
| Santa Margarita Water District | USA |
| Santa Ynez River, California | USA |
| Santee Cooper, South Carolina | USA |
| Santee Electric Cooperative (SEC) Incorporated, South Carolina | USA |
| Sarasota County | USA |
| Sask Energy | CAN |
| Sask Power | CAN |
| Sauk Center Public Utilities, Minnesota | USA |
| Sawnee Electric Membership Corporation (EMC) | USA |
| Scenic Rivers Energy Cooperative | USA |
| Schuylkill County Municipal Authority, Pennsylvania | USA |
| Scotts Valley Water District, California | USA |
| Scottsboro Electric Power Board, Nebraska | USA |
| Scottsboro Water, Sewer, and Gas (SWG), Alabama | USA |
| Seacoast Utility Authority, Florida | USA |
| Security Water And Sanitation District, Colorado | USA |
| Sedalia Water Department MO | USA |
| Sedgwick County Electric Cooperative, Kansas | USA |
| Semco Energy Gas Company | USA |
| Seminole County, Florida | USA |
| Sequachee Valley Electric Cooperative (SVEC), Tennessee | USA |
| Sevier County Electric System, Tennessee | USA |
| Sevier County Utility District, Tennessee | USA |
| Seville Board of Public Affairs, Ohio | USA |
| Sewanee Utility District, Tennessee | USA |
| Sewerage and Water Board of New Orleans | USA |
| Shakopee Public Utilities Commission, Minnesota | USA |
| Sharp Energy | USA |
| Sharyland Water Supply Corporation | USA |
| Shawano Municipal Utilities, Wisconsin | USA |
| Sheffield Utilities, Alabama | USA |
| Shelby County, Alabama | USA |
| Shelby Energy Cooperative, Kentucky | USA |
| Shelby Township, Michigan | USA |
| Shelbyville Power Water & Sewerage Systems, Tennessee | USA |
| Shelbyville Water And Sewer, Kentucky | USA |
| Shell Energy Connect | USA |
| Shenandoah Valley Electric Cooperative | USA |
| Sheridan Electric Cooperative Inc, Montana | USA |
| Shipley Energy | USA |
| ShoppersDrug Mart Inc., Canada | CAN |
| Shrewsbury Electric and Cable Operations (SELCO) | USA |
| SiEnergy | USA |
| Sierra Electric Cooperative | USA |
| Sierra Vista Department of Public Works, Arizona | USA |
| Sikeston Board of Municipal Utilities, Missouri | USA |
| Silver Creek Water Corporation, Indiana | USA |
| Silverdale Water District, Washington | USA |
| Singing River Electric Power Association | USA |
| Sioux Falls Utilities, South Dakota | USA |
| Sioux Lookout Hydro | CAN |
| Sioux Valley Energy, South Dakota | USA |
| Skagit Public Utility District, Washington | USA |
| Slash Pine Electric Membership Corporation | USA |
| Smithfield, North Carolina | USA |
| Smithville Electric System, Tennessee | USA |
| Snapping Shoals Electric Membership Corporation (SSEMC) | USA |
| Snohomish County Public Utility District (PUD) No. 1 | USA |
| Socorro Electric Cooperative, New Mexico | USA |
| Somerset Rural Electric Cooperative Incorporated, Pennsylvania | USA |
| Soos Creek Water & Sewer District Washington | USA |
| Soquel Creek Water District, California | USA |
| South Adams County Water & Sanitation District | USA |
| South Alabama Electric Cooperative | USA |
| South Blount County Utility District, Tennessee | USA |
| South Brunswick, New Jersey | USA |
| South Central Indiana REMC, Indiana | USA |
| South Central Power Company, Ohio | USA |
| South Central Public Power District (SCPPD), Nebraska | USA |
| South Coast Water District, California | USA |
| South East Missouri Electric Cooperative, Missouri | USA |
| South Freestone County WSC, Texas | USA |
| South Granville Water & Sewer Authority (SGWASA), North Carolina | USA |
| South Hadley Electric Light Department, Massachusetts | USA |
| South Harrison Water Corporation, Indiana | USA |
| South Highway Water District, Illinois | USA |
| South Jersey Gas | USA |
| South Kentucky Rural Electric Cooperative Corporation, Kentucky | USA |
| South Louisiana Electric Cooperative Association (SLECA), Louisiana | USA |
| South Middleton Township, Pennsylvania | USA |
| South Ogden, Utah | USA |
| South Placer Municipal Utility, California | USA |
| South Plains Electric Cooperative, Inc. | USA |
| South River Electric Membership Corporation, North Carolina | USA |
| South Tahoe Public Utility District, California | USA |
| South Utah Valley Electric Service District (SESD), Utah | USA |
| South Walton Utility Company, Florida | USA |
| South West Water Company | USA |
| SouthEastern Illinois Electric Cooperative Inc, Illinois | USA |
| Southaven Mississippi, Mississippi | USA |
| Southeast Colorado Power Association Cooperative, Colorado | USA |
| Southeast Gas, Alabama | USA |
| Southeast Indiana Rural Electric Membership Corporation, Indiana | USA |
| Southeast Morris County Municipal Utilities Authority, New Jersey | USA |
| Southeastern Electric Cooperative Inc, South Dakota | USA |
| Southern California Edison (SCE) | USA |
| Southern California Gas Company (SoCalGas) | USA |
| Southern Company | USA |
| Southern Connecticut Gas | USA |
| Southern Illinois Electric Cooperative, Illinois | USA |
| Southern Indiana Power, Indiana | USA |
| Southern Maryland Electric Cooperative (SMECO), Maryland | USA |
| Southern Monroe Water Authority, Indiana | USA |
| Southern Montgomery County Municipal Utility District, Texas | USA |
| Southern Oklahoma Water Corporation, Oklahoma | USA |
| Southern Pine Electric Cooperative, Alabama | USA |
| Southern Pine Electric, Mississippi | USA |
| Southern Pioneer Electric Company, Kansas | USA |
| Southern Power District, Nebraska | USA |
| Southern Rivers Energy, Georgia | USA |
| Southlake Utilities Incorporated, Florida | USA |
| Southside Electric Cooperative, Virginia | USA |
| Southwest Arkansas Electric Cooperative, Arkansas | USA |
| Southwest Electric Cooperative, Missouri | USA |
| Southwest Electric, Mississippi | USA |
| Southwest Licking Community Water & Sewer District, Ohio | USA |
| Southwest Louisiana Electric Membership Corporation (SLEMCO), Louisiana | USA |
| Southwest Regional Water District, Ohio | USA |
| Southwest Tennessee Electric Membership Corporation, Tennessee | USA |
| Southwestern Electric Cooperative, Inc. | USA |
| Spanaway Water Company | USA |
| Spanish Fork Public Works, Utah | USA |
| Spanish Fort Water System, Alabama | USA |
| Spark Energy | USA |
| Spartanburg Water, South Carolina | USA |
| Spectrum Utilities Solutions Inc, Ohio | USA |
| Spire | USA |
| Spokane County Environmental Services, Washington | USA |
| Spoon River Electric Cooperative, Illinois | USA |
| Spot Power, Alberta | USA |
| Sprague | USA |
| Spring Creek Utility District, Texas Municipal Operations And Consulting | USA |
| Springdale Water Utilities, Arkansas | USA |
| Springer Electric Cooperative, Incorporated, New Mexico | USA |
| Springfield Utility Board (SUB), Oregon | USA |
| Springfield Water and Sewer Commission, Massachusetts | USA |
| Springville City Power, Utah | USA |
| St. Cloud Utilities, Florida | USA |
| St. Croix Gas, Wisconsin | USA |
| St. Louis Park, Minnesota | USA |
| St. Mary's County Metropolitan Commission, Maryland | USA |
| Stamford Water Pollution Control Authority, Connecticut | USA |
| Starkville Utilities, Mississippi | USA |
| Stearns Electric Association, Minnesota | USA |
| Steele-Waseca Cooperative Electric, Minnesota | USA |
| Sterling Municipal Light Department, Massachusetts | USA |
| Steuben County Rural Electric Membership Corporation, Indiana | USA |
| Steuben Rural Electric Cooperative, Incorporated, New York | USA |
| Stonegate Village Metropolitan District, Colorado | USA |
| Stoughton Utilities, Wisconsin | USA |
| Stowe Electric Department, Vermont | USA |
| Strathcona County, Alberta | CAN |
| Stream | USA |
| Studebaker Submetering Incorporated, Virginia | USA |
| Sturgeon Bay Utilities, Wisconsin | USA |
| Suburban Natural Gas Company | USA |
| Suburban Propane | USA |
| Suburban Water Company | USA |
| Sudbury Water District, Massachusetts | USA |
| Suffolk County Water Authority (SCWA), New York | USA |
| Sulphur Springs Valley Electric Cooperative, Incorporated, Arizona | USA |
| Summer Energy | USA |
| Summerville Comissioners Of Public Works, South Carolina | USA |
| Summit Natural Gas, Missouri | USA |
| Summit Water And Supply Company, Washington | USA |
| Summit Water Distribution Company, Utah | USA |
| Sumner-Cowley Electric Coop., Inc., Kansas | USA |
| Sumter Electric Membership Corporation, Georgia | USA |
| Sun Belt Fresh Water Supply District, Harris CO. Texas | USA |
| Sun Prairie Utilities | USA |
| Sun River Electric Cooperative, Montana | USA |
| Sun Valley General Improvement District, Nevada | USA |
| Sunrise Water Authority, Oregon | USA |
| Superior Charter Township, Michigan | USA |
| Superior Water, Light and Power (SWLP) | USA |
| Surprise, Arizona | USA |
| Surry-Yadkin Electric Membership Corporation, North Carolina | USA |
| Sussex Rural Electric Cooperative, New Jersey | USA |
| Suwannee Valley Electric Cooperative, Florida | USA |
| Swanton Village, Inc., Vermont | USA |
| Sweetwater Authority, California | USA |
| Sweetwater Utilities Board, Tenneessee | USA |
| Sylacauga Utilities Board, Alabama | USA |
| Symmetry Energy Solutions LLC | USA |
| Synergy North Canada | CAN |
| T And W Water Service, Texas | USA |
| T.I.P. Rural Electric Cooperative, Iowa | USA |
| TNG, Texas | USA |
| TXU Energy | USA |
| Tahlequah Public Works Authority, Oklahoma | USA |
| Talen Energy | USA |
| Tallahatchie Valley Electric Power Association, Mississippi | USA |
| Tallapoosa River Electric Cooperative, Alabama | USA |
| Talquin | USA |
| Tangipahoa Water District, Louisiana | USA |
| Tanner Electric Cooperative, Washington | USA |
| Tara Energy | USA |
| Taunton Municipal Lighting Plant (TMLP) | USA |
| Taunton Water Division, Massachusetts | USA |
| Taylor County RECC, Kentucky | USA |
| Taylor Electric Cooperative, Texas | USA |
| Taylor Electric Cooperative, Wisconsin | USA |
| Taylor Garbage Services, Incorporated, New York | USA |
| Teco Energy | USA |
| Temescal Valley Water District, California | USA |
| Tennessee Valley Electric Cooperative | USA |
| Terrebonne Parish Consolidated Government, Louisiana | USA |
| Texans Energy, Texas | USA |
| Texarkana Water Utilities | USA |
| Texas Gas Service | USA |
| Texas Gas Utility Services, Inc. | USA |
| Texas-New Mexico Power Company (TNMP) | USA |
| The 21st Century Energy Group | USA |
| The Borough Of Coudersport, Pennsylvania | USA |
| The Borough Of Somerset, Pennsylvania | USA |
| The Borough of Flemington, New Jersey | USA |
| The City Of Aumsville, Oregon | USA |
| The City Of Euless, Texas | USA |
| The City Of Fircrest, Washington | USA |
| The City of Aiken, South Carolina | USA |
| The City of Akron, Ohio | USA |
| The City of Albert Lea, Minnesota | USA |
| The City of Boca Raton, Florida | USA |
| The City of Boerne, Texas | USA |
| The City of Fairfield, Ohio | USA |
| The City of Fort Walton Beach, Florida | USA |
| The City of Gainesville, Texas | USA |
| The City of Galion, Ohio | USA |
| The City of Gravette, Arkansas | USA |
| The City of Lake Jackson, Texas | USA |
| The City of Oxford Electric Department, Mississippi | USA |
| The City of Palm Bay, Florida | USA |
| The City of Paris, Texas | USA |
| The City of Pelham, Alabama | USA |
| The City of Pembroke Pines, Florida | USA |
| The City of Portage, Michigan | USA |
| The City of Radford, Virginia | USA |
| The City of Ridgeland, Mississippi | USA |
| The City of Talladega, Alabama | USA |
| The City of Tomball, Texas | USA |
| The City of Waco, Texas | USA |
| The City of Warrenton, Missouri | USA |
| The County of DuPage, Illinois | USA |
| The Frontier Power Company, Ohio | USA |
| The Illuminating Company (First Energy) | USA |
| The Municipal Authority Of The Township Of Robinson, Pennsylvania | USA |
| The Satilla Rural Electric Membership Corporation, Georgia | USA |
| The Texas General Land Office | USA |
| The Town Of Highland Park, Texas | USA |
| The Town Of Kilmarnock, Virginia | USA |
| The Town of Ashland City, Tennessee | USA |
| The Town of Clarksville, Indiana | USA |
| The Town of Clinton Department of Public Works, Massachusetts | USA |
| The Town of Vienna, Maryland | USA |
| The Township of Parsippany - Troy Hills, New Jersey | USA |
| The United City of Yorkville, Illinois | USA |
| The Village of Glenview, Illinois | USA |
| The Village of Ilion, New York | USA |
| The Village of Wellington, Florida | USA |
| The Woodlands Joint Powers Agency (WJPA), Texas | USA |
| The York Water Company | USA |
| Thermal Energy Corporation (TECO) | USA |
| Third Taxing District (TTD), Connecticut | USA |
| Three Notch Electric Membership Corporation, Georgia | USA |
| Three Rivers Electric Cooperative, Missouri | USA |
| Thumb Electric Cooperative (TEC), Michigan | USA |
| Thunder Bay Hydro Electricity Distribution, Incorporated, Ontario | CAN |
| Tideland EMC, North Carolina | USA |
| Tidewater Utilities Inc NJ | USA |
| Tiger Natural Gas | USA |
| Tillamook People's Utilities District (PUD) | USA |
| Timber Lane Utility District, Texas (Hays Utility South) | USA |
| Tipmont Rural Electric Membership Corporation (REMC), Indiana | USA |
| Tippah Electric Power Association, Mississippi | USA |
| Todd Wadena Electric Cooperative, Minnesota | USA |
| Toho Water Authority, Florida | USA |
| Toledo Edison (First Energy) | USA |
| Tombigbee Electric Power Association, Mississippi | USA |
| Tontitown Water Utilities, Arkansas | USA |
| Toronto Hydro | CAN |
| Town Of Ayden, North Carolina | USA |
| Town Of Bargersville, Indiana | USA |
| Town Of Belmont, Massachusetts | USA |
| Town Of Billerica, Massachusetts | USA |
| Town Of Black Mountain, North Carolina | USA |
| Town Of Breckenridge, Colorado | USA |
| Town Of Buena Vista, Colorado | USA |
| Town Of Discovery Bay, California | USA |
| Town Of Erwin, New York | USA |
| Town Of Maiden, North Carolina | USA |
| Town Of North Reading, Massachusettes | USA |
| Town Of Orange, Virginia | USA |
| Town Of Paxton, Massachusetts | USA |
| Town Of Richmond Hill, Canada | USA |
| Town Of Sellersburg, Indiana | USA |
| Town Of Somerville, Tennessee | USA |
| Town Of Strathmore, Alberta | CAN |
| Town Of Weaverville, North Carolina | USA |
| Town Of West Springfield, Massachusetts | USA |
| Town of Addison, Texas | USA |
| Town of Afton, Wyoming | USA |
| Town of Apex, North Carolina | USA |
| Town of Bernalillo, New Mexico | USA |
| Town of Big Flats, New York | USA |
| Town of Bonnyville, Alberta | CAN |
| Town of Boone, North Carolina | USA |
| Town of Braintree, Massachusetts | USA |
| Town of Brookline, Massachusetts | USA |
| Town of Brownsburg, Indiana | USA |
| Town of Burlington Department of Public Works, Massachusetts | USA |
| Town of Canmore, Alberta | CAN |
| Town of Cary, North Carolina | USA |
| Town of Castle Rock, Colorado | USA |
| Town of Chatham, Massachusetts | USA |
| Town of Chesteron, Indiana | USA |
| Town of Chino Valley, Arizona | USA |
| Town of Christiansburg, Virginia | USA |
| Town of Clayton Utilities Services, North Carolina | USA |
| Town of Clayton, Delaware | USA |
| Town of Concord Municipal Utilities, Massachusetts | USA |
| Town of Culpeper, Virginia | USA |
| Town of Dallas, North Carolina | USA |
| Town of Danvers Electric Division, Massachusetts | USA |
| Town of Danville, Indiana | USA |
| Town of Dartmouth, Massachusetts | USA |
| Town of Davie, Florida | USA |
| Town of Delmar, Maryland | USA |
| Town of Derry, New Hampshire | USA |
| Town of Eagle, Department of Utilities, Colorado | USA |
| Town of Easton Water Division, Massachusetts | USA |
| Town of Ellettsville, Indiana | USA |
| Town of Erie, Colorado | USA |
| Town of Fairplay, Colorado | USA |
| Town of Flower Mound, Utility Billing, Texas | USA |
| Town of Forest City, Department of Utilities, North Carolina | USA |
| Town of Fuquay-Varina, North Carolina | USA |
| Town of Gilbert, Arizona | USA |
| Town of Grand Chute, Wisconsin | USA |
| Town of Granite Falls, North Carolina | USA |
| Town of Gypsum, Department of Public Works, Colorado | USA |
| Town of Harrisburg Water Department, North Carolina | USA |
| Town of Hartford Water Division, Vermont | USA |
| Town of Highland Beach, Florida | USA |
| Town of Jackson, Wyoming | USA |
| Town of Jupiter, Florida | USA |
| Town of Kenly, North Carolina | USA |
| Town of Lady Lake, Florida | USA |
| Town of Landis, North Carolina | USA |
| Town of Leesburg, Virginia | USA |
| Town of Lexington, Massachusetts | USA |
| Town of Little Elm, Texas | USA |
| Town of Louisburg, North Carolina | USA |
| Town of Lowell, Indiana | USA |
| Town of Madisonville, Louisiana | USA |
| Town of Marana, Arizona | USA |
| Town of Marshfield Water Department, Massachusetts | USA |
| Town of Massena Electric Department, New York | USA |
| Town of Medley, Florida | USA |
| Town of Menasha, Wisconsin | USA |
| Town of Middlesex, North Carolina | USA |
| Town of Mooresville, North Carolina | USA |
| Town of Mountain View, Wyoming | USA |
| Town of Munster, Indiana | USA |
| Town of Nags Head, North Carolina | USA |
| Town of Natick, Massachusetts | USA |
| Town of Newport, North Carolina | USA |
| Town of Normal, Illinois | USA |
| Town of North Borough, Department of Public Works, Massachusetts | USA |
| Town of North Wilkesboro, North Carolina | USA |
| Town of Northlake, Texas | USA |
| Town of Orange Park, Florida | USA |
| Town of Payson, Arizona | USA |
| Town of Pendleton, Indiana | USA |
| Town of Pendleton, South Carolina | USA |
| Town of Pinedale, Wyoming | USA |
| Town of Plainfield, Indiana | USA |
| Town of Providence Village, Texas | USA |
| Town of Putnam, Connecticut | USA |
| Town of Queen Creek Utilities, Arizona | USA |
| Town of Roland, Oklahoma | USA |
| Town of Sharon, Massachusetts | USA |
| Town of Silverthorne, Colorado | USA |
| Town of Smyrna, Delaware | USA |
| Town of Smyrna, Tennessee | USA |
| Town of Taos, New Mexico | USA |
| Town of Tewksbury, Massachusetts | USA |
| Town of Thatcher, Arizona | USA |
| Town of Vienna, Virginia | USA |
| Town of Wake Forest, North Carolina | USA |
| Town of Walpole, Department of Public Works, Massachusetts | USA |
| Town of Warrenton, Virginia | USA |
| Town of Watertown, Massachusetts | USA |
| Town of Waynesville, North Carolina | USA |
| Town of Wheatland, Wyoming | USA |
| Town of Wickenburg, Arizona | USA |
| Town of Windham, Connecticut | USA |
| Town of Windsor, Colorado | USA |
| Town of Wytheville, Virginia | USA |
| Township Of Edison, New Jersey | USA |
| Township of Centre Wellington, Ontario | CAN |
| Township of Medford, New Jersey | USA |
| Township of Wall, New Jersey | USA |
| TransAlta | CAN |
| TransCanada | USA |
| Traverse City, Michigan | USA |
| Travis County Water Control & Improvement District 17, Texas (EDP) | USA |
| Travis County Water District 10, Texas | USA |
| Trementon City, Utah | USA |
| Trenton Light & Water, Tennessee | USA |
| Tri County Electric Cooperative Inc, Michigan | USA |
| Tri County Electric Membership Corporation, Georgia | USA |
| Tri County Electric Membership Corporation, North Carolina | USA |
| Tri-County Electric (TCE) Cooperative, South Carolina | USA |
| Tri-County Electric Cooperative (TCEC), Illinois | USA |
| Tri-County Electric Cooperative (TCEC), Oklahoma | USA |
| Tri-County Electric Cooperative, Texas | USA |
| Tri-County Electric Membership Corporation (EMC), Georgia | USA |
| Tri-County Electric, Tennessee | USA |
| Tri-County Rural Electric Cooperative, Incorporated, Pennsylvania | USA |
| TriEagle Energy | USA |
| Trico Electric Cooperative | USA |
| Tricounty Rural Electric Cooperative, Ohio | USA |
| Trinity Valley Electric Cooperative, Texas | USA |
| Trophy Club Municipal Utility District, Texas | USA |
| Truckee Donner Public Utility District, California | USA |
| Truckee Meadows Water Authority, Nevada | USA |
| Trumbull County, Ohio | USA |
| Trussville Gas And Water, Alabama | USA |
| Tualatin Valley Water District, Oregon | USA |
| Tucson Electric Power (TEP) | USA |
| Tuolumne Utilities District (TUD), California | USA |
| Tupelo Water & Light, Mississippi | USA |
| Turlock Irrigation District (TID) Water & Power | USA |
| Tuskegee Utility Board, Alabama | USA |
| Twin Eagle | USA |
| Two Rivers Water and Light, Wisconsin | USA |
| U.S. Water Services Corporation | USA |
| UGI Energy Services | USA |
| UGI Utilities | USA |
| Umatilla Electric Cooperative (UEC) | USA |
| UniSource Energy Services | USA |
| Union Charter Township, Michigan | USA |
| Union County, North Carolina | USA |
| Union Gas (Enbridge) | CAN |
| Union Hill Water Association, Washington | USA |
| Union Power Cooperative, North Carolina | USA |
| Union Rural Electric (URE) Cooperative, Ohio | USA |
| United Cooperative Services | USA |
| United Electric Cooperative, Incorporated, Pennsylvania | USA |
| United Illuminating (UI) | USA |
| United Metro Energy Corporation, New York | USA |
| United Power | USA |
| United Water | USA |
| Unitil | USA |
| Upper Cumberland Electric Membership corporation | USA |
| Upper Peninsula Power Company (UPPCO) | USA |
| Upson Electric Membership Corporation, Georgia | USA |
| Ute Water Conservancy District, Colorado | USA |
| Utilities Board of Rainbow City, Alabama | USA |
| Utilities District Of Western Indiana Rural Electric Membership Corporation, Indiana | USA |
| Utilities Incorporated | USA |
| Utilities Kingston | CAN |
| Utility Billing Services, Arkansas | USA |
| Utility Billing Services, Tennessee | USA |
| Utility Management Solutions | USA |
| Utility Recovery Systems | USA |
| Utility Service Group | USA |
| Utility Services of Alaska | USA |
| Vail Water Company, Arizona | USA |
| Valencia Water Company (VWC), CA | USA |
| Vallecitos Water District CA | USA |
| Valley County Water District, California | USA |
| Valley Electric Association, Incorporated | USA |
| Valley Energy | USA |
| Valley Rural Electric Cooperative, Incorporated | USA |
| Valparaiso City Utilities, Indiana | USA |
| Vandenberg Village Community Services District, California | USA |
| Vanguard Energy Services | USA |
| Vera Water and Power | USA |
| Verdigris Valley Electric Co-operative (VVEC) Incorporated | USA |
| Verdigris Valley Electric Coop OK | USA |
| Verendrye Electric Cooperative (VEC) | USA |
| Veridian Connections, Ontario | CAN |
| Vermont Electric Cooperative | USA |
| Vermont Gas | USA |
| Vernon Electric Cooperative, Wisconsin | USA |
| Versant Power | USA |
| Veteran Energy, Texas | USA |
| Vicinity Energy | USA |
| Victoria Electric Cooperative (VEC) | USA |
| Victory Electric Cooperative, Incorporated | USA |
| Vigilante Electric Cooperative | USA |
| Village Community Development District Utilities, Florida | USA |
| Village Of Hanover Park, Illinois | USA |
| Village Of Menomonee Falls Utilities, Wisconsin | USA |
| Village Of Prairie Du Sac, Wisconsin | USA |
| Village Of Slinger, Wisconsin | USA |
| Village Of Versailles, Ohio | USA |
| Village of Arlington Heights, Illinois | USA |
| Village of Ashwaubenon, Wisconsin | USA |
| Village of Bangor, Wisconsin | USA |
| Village of Bannockburn, Illinois | USA |
| Village of Bellevue, Wisconsin | USA |
| Village of Bensenville, Illinois | USA |
| Village of Berkeley, Illinois | USA |
| Village of Black Earth, Wisconsin | USA |
| Village of Bloomingdale, Illinois | USA |
| Village of Bridgeview, Illinois | USA |
| Village of Buffalo Grove, Illinois | USA |
| Village of Canton, New York | USA |
| Village of Carol Stream, Illinois | USA |
| Village of Carol Stream, Illinois | USA |
| Village of Chatham, Illinois | USA |
| Village of Clarendon Hills, Illinois | USA |
| Village of Covington, Ohio | USA |
| Village of Crestwood, Illinois | USA |
| Village of Crete, Illinois | USA |
| Village of DeForest, Wisconsin | USA |
| Village of Deerfield, Illinois | USA |
| Village of Downers Grove, Illinois | USA |
| Village of Fox Lake, Illinois | USA |
| Village of Frankfort, New York | USA |
| Village of Franklin Park, Illinois | USA |
| Village of Freeburg, Illinois | USA |
| Village of Glendale Heights, Illinois | USA |
| Village of Grayslake, Illinois | USA |
| Village of Hartland, Wisconsin | USA |
| Village of Highland Falls, New York | USA |
| Village of Hoffman Estates, Illinois | USA |
| Village of Johnstown, Ohio | USA |
| Village of Lincolnwood, Illinois | USA |
| Village of Lombard, Illinois | USA |
| Village of Los Lunas, New Mexico | USA |
| Village of Lyndonville, Vermont | USA |
| Village of Malone, New York | USA |
| Village of Mazomanie, Wisconsin (Utility) | USA |
| Village of Melrose Park, Illinois | USA |
| Village of Midlothian, Illinois | USA |
| Village of Morton, Illinois | USA |
| Village of Mount Orab, Ohio | USA |
| Village of Newberry, Michigan | USA |
| Village of North Aurora, Illinois | USA |
| Village of North Fond Du Lac, Wisconsin | USA |
| Village of Northbrook, Illinois | USA |
| Village of Oaklawn, Illinois | USA |
| Village of Palatine, Illinois | USA |
| Village of Pleasant Prairie, Wisconsin | USA |
| Village of Poplar Grove, Illinois | USA |
| Village of Richmondville, New York | USA |
| Village of Riverton, Illinois | USA |
| Village of Romeoville Utilities Service, Illinois | USA |
| Village of Roselle, Illinois | USA |
| Village of Rouses Point, New York | USA |
| Village of Ruidoso, New Mexico | USA |
| Village of Schaumburg, Illinois | USA |
| Village of Shorewood, Illinois | USA |
| Village of Shorewood, Wisconsin | USA |
| Village of Skaneateles, New York | USA |
| Village of Skokie, Illinois | USA |
| Village of Spencerport, New York | USA |
| Village of Streamwood, Illinois | USA |
| Village of Sussex, Department of Public Works, Wisconsin | USA |
| Village of Walworth, Wisconsin | USA |
| Village of Waynesfield, Ohio | USA |
| Village of Wheeling, Illinois | USA |
| Village of Winnetka, Illinois | USA |
| Village of Woodridge, Illinois | USA |
| Village of Yellow Springs, Ohio | USA |
| Vilonia Waterworks Association, Arkansas | USA |
| Vincennes Water Utilities, Indiana | USA |
| Virgin Islands Water and Power Authority | USA |
| Virgin Valley Water District, Nevada | USA |
| Virginia Department of Public Utilities, Minnesota | USA |
| Virginia Natural Gas | USA |
| Vista Irrigation District (VID) | USA |
| Volunteer Energy Cooperative (VEC) | USA |
| Volusia County, Florida | USA |
| WOW! | USA |
| WTU Retail Energy | USA |
| Wagoner County Water District #4, Oklahoma | USA |
| Wahkiakum County Public Utility District, Washington | USA |
| Wake Electric | USA |
| Wakefield Municipal Gas and Light Department (MGLD), Massachusetts | USA |
| Walnut Valley Water District, California | USA |
| Walton Electric Membership Corporation (EMC) | USA |
| Walton Gas, Georgia | USA |
| Warminster Municipal Authority, Pennsylvania | USA |
| Warren County Rural Electric Membership Cooperative (REMC), Indiana | USA |
| Warren County Water District (WCWD), Kentucky | USA |
| Warren Rural Electric Cooperative Corporation (RECC) | USA |
| Wasco Electric Cooperative, Incorporated, Oregon | USA |
| Washington City Utilities, Utah | USA |
| Washington County, Maryland | USA |
| Washington Electric Cooperative, Inc., Vermont | USA |
| Washington Electric Cooperative, Incorporated, Ohio | USA |
| Washington Electric Membership Corporation, Georgia | USA |
| Washington Gas | USA |
| Washington Suburban Sanitary Commission (WSSC) Water | USA |
| Washington Township Municipal Utilities Authority (WTMUA), New Jersey | USA |
| Washington Water Authority, Arkansas | USA |
| Washington Water Service, Washington | USA |
| Washington-East Washington Joint Authority, Pennsylvania | USA |
| Washington-St. Tammany (WST) Electric Cooperative, Incorporated | USA |
| Waste Management | USA |
| Water Authority of Dickson County (WADC), Tennessee | USA |
| Water Service Corporation of Kentucky | USA |
| Water Services, Incorporated, Texas | USA |
| Water Works and Lighting Commission (WWLC), Wisconsin | USA |
| WaterOne | USA |
| WaterWatch Corporation | USA |
| Waterloo North Hydro Inc, Ontario | CAN |
| Waterloo Utilities, Wisconsin | USA |
| Waterloo Water Works, Iowa | USA |
| Watertown Municipal Utilities, South Dakota | USA |
| Waukesha Water Utility, Wisconsin | USA |
| Waunakee Utilities | USA |
| Waupun Utilities, Wisconsin | USA |
| Waverly Sanitary District, Wisconsin | USA |
| Wayne Water Districts, North Carolina | USA |
| We Energies | USA |
| Weaverville Community Services District, California | USA |
| Webster Electric Cooperative, Missouri | USA |
| Welland Hydro-Electric System Corporation, Ontario | CAN |
| Wellborn Special Utility District, Texas | USA |
| Wellington North Power Inc., Ontario | CAN |
| Wells Branch Municipal Utility District, Texas | USA |
| Wells Rural Electric Company, Nevada | USA |
| Wellsboro Electric Company, Pennsylvania | USA |
| Wellton-Mohawk Irrigation And Drainage District, Arizona | USA |
| West Central Electric Cooperative Inc, Missouri | USA |
| West Central Electric Cooperative Incorporated, South Dakota | USA |
| West Coast Gas Company, California | USA |
| West Deptford Township, New Jersey | USA |
| West Des Moines Water Works, Iowa | USA |
| West Escambia Utilities Inc, Alabama | USA |
| West Florida Electric Cooperative, Florida | USA |
| West Harris County Municipal Utility District No.21, Texas | USA |
| West Jackson County Utility District, Mississippi | USA |
| West Kentucky Rural Electric Cooperative Corporation, Kentucky | USA |
| West Knox Utility District, Tennessee | USA |
| West Mifflin Sanitary Sewer Municipal Authority (WMSSMA), Pennsylvania | USA |
| West Oregon Electric Cooperative Incorporated, Oregon | USA |
| West Park Municipal Utility District,Texas Hays South | USA |
| West Penn Power (First Energy) | USA |
| West River Electric Association, Incorporated | USA |
| West Slope Water District, Oregon | USA |
| West Sound Utility District, Washington | USA |
| West Tennessee Public Utility District, Tenneessee | USA |
| West Valley Water District, California | USA |
| West View Water Authority (WVWA), Pennsylvania | USA |
| West Wilson Utility District, Tennessee | USA |
| Westario Power Inc | CAN |
| Western Cooperative Electric, Kansas | USA |
| Western Indiana Energy Rural Electric Membership Cooperative, Indiana | USA |
| Western Municipal Water District, California | USA |
| Western Virginia Water Authority | USA |
| Westfield Gas and Electric, Massachusetts | USA |
| Wetumpka Water Works, Alabama | USA |
| Wharton County Electric Cooperative, Incorporated, Texas | USA |
| Wheat Ridge Water District, Colorado | USA |
| Wheatland Electric | USA |
| White Bear Township, Minnesota | USA |
| White City Water Improvement District, Utah | USA |
| White House Utility District, Tennessee | USA |
| White River Electric Association Inc., Colorado | USA |
| White River Valley Electric Cooperative Inc, Missouri | USA |
| Whitewater Valley REMC | USA |
| Williamson County WSID3, Texas | USA |
| Williamsport Municipal Water, Pennsylvania | USA |
| Willmar Municipal Utilities, Minnesota | USA |
| Winchester Municipal Utilities, Kentucky | USA |
| Winchester Utilities, Tennessee | USA |
| Winners Merchants International, Ontario | CAN |
| Wiregrass Electric Cooperative, Alabama | USA |
| Wisconsin Public Service (WPS) | USA |
| Wise Electric Cooperative, Texas | USA |
| Withlacoochee River Electric Cooperative, Incorporated | USA |
| Wood Creek Water District, Kentucky | USA |
| Woodinville Water District, Washington | USA |
| Woodlawn Utility District, Tennessee | USA |
| Woodmen Hills Metropolitan District, Colorado | USA |
| Wooster City Services, Ohio | USA |
| Worcester County, Maryland | USA |
| Wright-Hennepin Cooperative Electric Association | USA |
| Wylie Northeast Special Utility District, Texas | USA |
| Wynne Water Utilities, Arkansas | USA |
| Wyoming Gas, Wyoming | USA |
| Wyomissing Borough, Pennsylvania | USA |
| Xcel Energy | USA |
| Xoom Energy | USA |
| YES Energy Management | USA |
| Yampa Valley Electric Association, Colorado | USA |
| Yellowstone Valley Electric Cooperative, Incorporated, Montana | USA |
| Yorba Linda Water District (YLWD), California | USA |
| York County Natural Gas Authority | USA |
| York County, South Carolina | USA |
| York Electric Cooperative (YEC), Incorporated, South Carolina | USA |
| Ypsilanti Community Utilities Authority (YCUA), Michigan | USA |
| Yucaipa Valley Water District, California | USA |
| Yuma and Washington Counties Electric Association Inc, Colorado | USA |
| Zia Natural Gas Company | USA |
| NB Power, New Brunswick | CAN |
| Energir | CAN |
