| American Public Works Association (APWA) |
| American Society of Civil Engineers (ASCE) |
| American Water Resources Association (AWRA) |
| American Water Works Association (AWWA) |
| Water Research Foundation (formerly AwwaRF) |
| Association of Metropolitan Water Agencies (AMWA) |
| Association of State Drinking Water Administrators (ASDWA) |
| Association of State and Interstate Water Pollution Control Administrators (ASIWPCA) |
| Civil Engineering Forum for Innovation (CEFI) |
| Global Water Research Coalition (GWRC) |
| Environmental and Water Resources Institute (EWRI) |
| National Academy of Engineering |
| National Academy of Sciences |
| National Association of Clean Water Agencies (NACWA) |
| National Association of Counties (NACO) |
| National Association of County Engineers International (NACE International) |
| National Association of Sewer Service Companies (NASSCO) |
| National Association of Water Companies (NAWC) |
| National Clay Pipe Institute (NCPI) |
| National Ground Water Association (NGWA) |
| National League of Cities |
| National Research Council (NRC) |
| National Research Council Canada, Institute for Research in Construction (NRC-IRC) |
| National Rural Water Associations (NRWA) |
| National Sanitation Foundation (NSF International) |
| National Science Foundation |
| National Society of Professional Engineers (NSPE) |
| National Solid Wastes Management Association (NSWMA) |
| National Technology Transfer Center (NTTC) |
| National Utility Contractors Association |
| Underground Construction Association of the Society for Mining, Metallurgy, and Exploration (UCA of SME) |
| North American Society for Trenchless Technology (NASTT) |
| Plastics Pipe Institute (PPI) |
| Solid Waste Association of North America (SWANA) |
| U.S. Conference of Mayors |
| Water Environment Federation (WEF) |
| Water Environment Research Foundation (WERF) |
| Water and Wastewater Equipment Manufacturers Association, Inc. (WWEMA) |
| WateReuse Association |
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