(As of September 2020)
The Water Works Board of the City of Birmingham Madison Utilities
Central Arkansas Water
EPCOR Water Arizona City of Tempe
Coliban Water
California American Water CompanyCity of LakewoodContra Costa Water DistrictEast Bay Municipal Utility DistrictGolden State Water Company - ClaremontGolden State Water Company - ClearlakeGolden State Water Company - SouthwestLiberty Utilities - Apple Valley Ranchos Water CompanyLong Beach Water DepartmentMetropolitan Water District of Southern California - Skinner Distribution PlantMetropolitan Water District of Southern California - Central Pool Distribution SystemMetropolitan Water District of Southern California - Mills Plant Distribution SystemSan Francisco Public Utilities CommissionSan Jose Waster Company
Aurora WaterCity of BoulderCity of WestminsterDenver WaterFort Collins UtilitiesParker Water & Sanitation District
City of Wilmington Water Department
Douglasville-Douglas County Water & Sewer Authority
City of Iowa City Water Division
Central Lake County Joint Action Water Agency
Citizens Energy Group
American Water Military Service-Fort Leavenworth City of OlatheWaterOne
Louisville Water Company Kentucky American Water
Portland Water District
American Water Military Service - Fort George G. MeadeAnne Arundel County Department of Public Works
Saint Cloud Public Utilities Saint Paul Regional Water Services City of Minneapolis Public Works Department
City of Saint Louis Water Division City Utilities of SpringfieldKansas City Water Services
Metropolitan Utilities District
Middlesex Water CompanyThe Southeast Morris County Municipal Utilities Authority
Albuquerque Bernalillo County Water Utility Authority
City of Rochester Water Bureau
Charlotte WaterCity of Raleigh Public UtilitiesCity of Sanford
Grand Forks Water Utility
Halifax Water - CentralHalifax Water - EastHalifax Water - West
Cleveland Division of Water
American Water Military Service (O&M) - Fort SillCity of Oklahoma CityCity of Tulsa Water Distribution
Lehigh County Authority - Allentown DivisionAqua America, Inc.East Greenville Borough Water DepartmentBrodhead Creek Regional AuthorityAuthority of the Bureau of CharleroiChester Water AuthorityCity of BethlehemCommunity Utilities of Pennsylvania, Inc.Cranberry TownshipDover Township Water DepartmentElizabethtown Area Water AuthorityEphrata Area Joint AuthorityHooversville Borough Municipal AuthorityHuntingdon Borough WaterCity of LancasterMeadville Area Water AuthorityNorth Penn Water AuthorityOakmont Water AuthorityPennsylvania American Water - Scranton PA SystemPhoenixville Water DepartmentReading Area Water AuthorityShamokin Dam Borough Water Treatment PlantUpper Saucon TownshipWestern Berks Water AuthorityWilliamsport Municipal Water AuthorityWrightsville Water
Pawtucket Water Supply Board
Hilton Head #1 Public Service District Sartex-Jackson-Wellford-Duncan Water District Mount Pleasant Waterworks Charleston Water System Powdersville Water Greenwood Commissioners of Public WorksGeorgetown County Water & Sewer District - Waccamaw Neck Georgetown County Water & Sewer District - PlantersvilleGeorgetown County Water & Sewer District - Red HillGeorgetown County Water & Sewer District - WedgefieldGreenville Water City of Goose CreekJoint Municipal Water & Sewer Commission
Austin Water UtilitySan Jacinto River Authority - The Woodlands Division American Water Military Service - South Fort Hood Fort Worth Water Department City of Houston El Paso Water Utilities Public Service Board
American Water Military Service - Fort AP HillAmerican Water Military Service - Fort Belvoir City of Virginia Beach Department of Public Utilities Newport News WaterworksPrince William County Service Authority
Champlain Water DistrictChamplain Water District Retail System
DC Water
Milwaukee Water Works