- International
- Global | Africa | Asia | Europe | Middle East | North America | South America
- By Country
- Australia | Bangladesh | Canada | China | India | Italy | Korea | Russia | Singapore
- South Africa | Spain | Sweden | Switzerland | United Kingdom | United States
- U.S. Regions
- Northwest | Southwest | Rocky Mountains | Northern Plains
- Southern Plains | Great Lakes | Northeast | Southeast
- By State
- AK | AL | AR | AZ | CA | CO | CT | DE | DC | FL | GA | HI | IA
- ID | IL | IN | KS | KY | LA | MA | MD | ME | MI | MN | MO | MS
- MT | NC | ND | NE | NH | NJ | NM | NV | NY | OH | OK | OR
- PA | RI | SC | SD | TN | TX | UT | VA | VT | WA | WI | WV | WY
Global
- 1% for the Planet
- 350.org
- Alliance for Water Stewardship (AWS)
- Appropriate Infrastructure Development Group (AIDG)
- Association for Environmental Health and Sciences (AEHS) Foundation
- Audubon International
- Avaaz.org
- Bat Conservation International (BCI)
- Blue Planet Project (BPP)
- Border Environment Cooperation Commission (BECC)
- Both ENDS
- CARE
- Center for International Environmental Law (CIEL)
- Center for Strategic and International Studies (CSIS)
- Charity Navigator
- Circle of Blue
- Climate and Development Knowledge Network (CDKN)
- Coherence in Information for Agricultural Research for Development (CIARD)
- Collaborative Partnership on Forests (CPF)
- Commission Internationale du Genie Rural (CIGR),
also known as the International Commission of Agricultural and Biosystems Engineering (ICABE) - Conservation International
- Consultative Group on International Agricultural Research (CGIAR)
- Corporate Accountability International (CAI)
- CrisisCommons
- Defenders of Wildlife
- Ducks Unlimited (DU)
- Earthwatch Institute
- Earth Island Institute
- Earth System Science Partnership (ESSP)
- East-West Center
- Ecotact
- Engineering for Change (E4C)
- Engineers Without Borders (EWB)
- EnviroCert International (ECI)
- Environmental and Engineering Geophysical Society (EEGS)
- Environmental Defense Fund (EDF)
- Federation of Fly Fishers
- Flood Control 2015
- Freshwater Action Network (FAN)
- Friends of the Earth
- Global Environment Facility (GEF)
- Global Facility for Disaster Reduction and Recovery (GFDRR)
- Global Forest Coalition (GFC)
- Global Forum on Agricultural Research (GFAR)
- Global Soil Biodiversity Initiative (GSBI)
- Global Subsidies Initiative (GSI)
- Global Water
- Global Water Network (GWN)
- Global Water Partnership (GWP)
- Green Cross International (GCI)
- IAP: the Global Network of Science Academies
- Imagine H2O
- Institute for Agriculture and Trade Policy (IATP)
- Institute for Governance & Sustainable Development (IGSD)
- Institute for Public Health and Water Research (IPWR)
- Institute for the Analysis of Global Security (IAGS)
- Institute for War & Peace Reporting (IWPR)
- Institute of Development Studies (IDS)
- Institute of Electrical and Electronics Engineers (IEEE)
- International Arid Lands Consortium (IALC)
- International Association for Ecology (INTECOL)
- International Association for Environmental Hydrology (IAEH)
- International Association for Society and Natural Resources (IASNR)
- International Association for Water Law (AIDA/IAWL)
- International Association of Emergency Managers (IAEM)
- International Association of Hydro-Environment Engineering & Research (IAHR),
also known as the International Association of Hydraulic Engineering and Research - International Association of Hydrogeologists (IAH)
- International Association of Hydrological Sciences (IAHS)
- International Bottled Water Association (IBWA)
- International Commission on Irrigation and Drainage (ICID)
- International Commission on Large Dams (ICOLD)
- International Community on Information Systems for Crisis Response and Management (ISCRAM)
- International Congress on Environmental Modelling and Software (IEMSS)
- International Council for Science (ICSU)
- International Crisis Group (ICG)
- International Desalination Association (IDA)
- International Development Research Centre (IDRC)
- International Energy Agency (IEA)
- International Erosion Control Association (IECA)
- International Federation for Information Processing (IFIP)
- International Federation of Agricultural Producers (IFAP)
- International Food Policy Research Institute (IFPRI)
- International Forum of Meteorological Societies (IFMS)
- International Forum on Globalization (IFG)
- International Hydrological Programme (IHP), part of UNESCO
- International Hydropower Association (IHA)
- International Institute for Environment and Development (IIED)
- International Institute for Strategic Studies (IISS)
- International Institute for Sustainable Development (IISD)
- International Lake Environment Committee (ILEC)
- International Land Coalition (ILC)
- International Network of Basin Organizations (INBO)
- International Network of Crisis Mappers (CM*Net)
- International Rivers
- International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE)
- International Society of Ecological Economics (ISEE)
- International Union for Conservation of Nature (IUCN)
- International Union of Forest Research Organizations (IUFRO)
- International Union of Geodesy and Geophysics (IUGG)
- International Water Association (IWA)
- International Water Management Institute (IWMI)
- International Water Resources Association (IWRA)
- Médecins Sans Frontières (MSF), a.k.a. Doctors without Borders
- Millennium Water Alliance (MWA)
- Natural Capital Project (NCP)
- Natural Heritage Institute (NHI)
- Nautilus Institute for Security and Sustainability (NISS)
- North American Lake Management Society (NALMS)
- North Pacific Anadromous Fish Commission (NPAFC)
- OneDrop.org
- Our Water Commons (OWC)
- People and Water
- People's Water Forum (PWF)
- Polaris Institute
- Post Carbon Institute (PCI)
- Project WET
- Public Library of Science (PLoS)
- Rainforest Alliance
- Random Hacks of Kindness (RHoK)
- RARE Conservation
- Rare Species Conservatory Foundation (RSCF)
- Resilience Alliance
- Rewilding Institute
- Rural Water Supply Network (RWSN)
- Ryan's Well Foundation
- Science Commons, an effort within the Creative Commons
- Sierra Club
- Skoll Foundation
- Society for Ecological Restoration (SER)
- Society for Human Ecology (SHE)
- Society for Industrial and Applied Mathematics (SIAM)
- Society of Wetland Scientists (SWS)
- Sustainability Transitions Research Network (STRN)
- Sustainable Commodity Initiative (SCI)
- Sustainable Hydropower Foundation (SHP)
- Trade Knowledge Network (TKN)
- United Nations Volunteers
- Ushahidi
- Valorisation des Etudes et Recherches dans les Sciences de l’Eau (VERSeau) Développement
- Veolia Environment Foundation (VEF)
- Water.org, formerly WaterPartners International (WPI)
- Water4 Foundation
- Water Advocates
- Water and Culture Institute (WCI)
- Water Centric
- Water Ethics Network (WEN)
- Water Footprint Network (WFN)
- Water for People
- Water Industry Alliance (WIA)
- Water Innovation Centre (WIC)
- Water Justice
- Water Pressures
- Water Supply and Sanitation Collaborative Council (WSSCC)
- Water Technology
- WaterAid International
- WaterCredit, an independent effort of Water.org
- Waterkeeper Alliance
- Watershed Management Group (WMG)
- Wetlands International
- Wildlands Network
- Wine to Water
- World Alliance for Innovation (WAI)
- World Business Council for Sustainable Development (WBCSD)
- World Commission on Dams (WCD)
- World Federation of Science Journalists (WFSJ)
- World Meteorological Organization (WMO)
- World Resources Institute (WRI)
- World Social Forum (WSF)
- World Toilet Organization (WTO)
- World Vision
- World Volunteer Web (WVW)
- World Water Council (WWC)
- World Water Organization (WWO)
- World Wildlife Fund (WWF)
Africa
- Africa Water Network (AWN)
- African Civil Society Network on Water and Sanitation (ANEW)
- African Medical and Research Foundation (AMREF)
- African Society for Ecological Economics (ASEE)
- African Wind Energy Association (AfriWEA)
- Africare
- Arab Forum for Environment and Development (AFED)
- Association of Agricultural Research Institutions in the Near East and North Africa (AARINENA), a regional component of GFAR
- Association of Strengthening Agricultural Research in Eastern and Central Africa (ASARECA)
- Centre for Environmental Economics and Policy in Africa (CEEPA)
- Dr. Aloy and Gesare Chife Foundation
- Environmental Protection and Sustainable Management of the Okavango River Basin (EPSMO)
- Forum for Agricultural Research in Africa (FARA),
a regional component of GFAR - Network of African Science Academies (NASAC)
- New Partnership for Africa’s Development (NEPAD)
- Nile Basin Discourse (NBD)
- Nile Basin Society (NBS)
- Orange-Senqu River Commission (ORASECOM)
- Permanent Okavango River Basin Water Commission (OKACOM)
- Sustainable Energy Society Southern Africa (SESSA)
- West and Central African Council for Agricultural Research and Development (CORAF/WECARD)
Asia
- Asian Development Bank Institute (ADBI)
- Asia Pacific Association of Agricultural Research Institutions (APAARI),
a regional component of GFAR - Asia-Pacific Water Forum (APWF)
- Australia-Indonesia Facility for Disaster Reduction (AIFDR)
- BOAO Forum for Asia (BFA)
- Central Asia and the Caucasus Association of Agricultural Research Institutions (CACAARI), a regional component of GFAR
- Central Asia-Caucasus Institute (CACI)
- Economy and Environment Program for South East Asia (EEPSEA)
- EurasiaNet.org
- Greater Tumen Initiative (GTI)
- Northeast Asia Economic Forum (NEAEF)
- Northeast Asia Sub-regional Programme for Environment Cooperation (NEASPEC)
- South Asia Network on Dams, Rivers and People (SANDRP)
- South Asian Network for Development and Environmental Economics (SANDEE)
Europe
- Aston Centre for Research into Safety and Security (CRISIS)
- Balkan Geophysical Society
- Chartered Institution of Water and Environmental Management (CIWEM)
- Corporate Europe Observatory (CEO)
- EurasiaNet.org
- European Alliance for Innovation (EAI)
- European Association of Environmental and Resource Economists (EAERE)
- European Forum on Agricultural Research and Development (EFARD),
a regional component of GFAR - European Geosciences Union (EGU)
- European Meteorological Society (EMS)
- European Society for Ecological Economics (ESEE)
- European Water Partnership (EWP)
- Iberoamerican Network for Ecological Economics (REDIBEC)
- INNOWater
- International Commission for the Protection of the Danube River (ICPDR)
- International Sava River Basin Commission (ISRBC)
- Nordic Association for Hydrology (NHF)
- Sustainable Europe Research Institute (SERI)
Middle East
- Arab Forum for Environment and Development (AFED)
- Friends of the Earth, Middle East (FoEME)
- Inter Islamic Network on Water Resources Development and Management (INWRDAM)
- Levant Desalination Association (LDA)
- Network of Syrian Scientists, Technologies and Innovators Abroad (NOSSTIA)
- Association of Agricultural Research Institutions in the Near East and North Africa (AARINENA), a regional component of GFAR
North America
- Commission for Environmental Cooperation (CEC)
- Forum for the Americas on Agricultural Research and Technology Development (FORAGRO), a regional component of GFAR
- International Association for Great Lakes Research (IAGLR)
- Mississippi River Commission (MRC)
- North American Alliance for Environmental Education (NAAEE)
- North American Institute of Earth Science Professionals (NAIESP)
- North American Lake Management Society (NALMS)
- North American Membrane Society (NAMS)
- North American Regional Forum on Agricultural Research (NAFAR), a regional component of GFAR
- Pacific Salmon Commission (PSC)
- Red River Basin Commission (RRBC)
- Rivers Foundation of the Americas (RFA)
- Tamarisk Coalition
- Urban and Regional Information Systems Association (URISA), also known as "The Association for GIS Professionals"
South America
- Forum for the Americas on Agricultural Research and Technology Development (FORAGRO), a regional component of GFAR
- Iberoamerican Network for Ecological Economics (REDIBEC)
- Latin American and Caribbean Environmental Economics Program (LACEEP)
- Pachamama Alliance
- Rivers Foundation of the Americas (RFA)
Australia
- Australia-Indonesia Facility for Disaster Reduction (AIFDR)
- Australia-New Zealand Society for Ecological Economics (ANZSEE)
- Australian Society for Soil Science (ASSSI)
- Australian Water Association (AWA)
- Engineers Australia
- Environment Management Industry Association of Australia (EMIAA)
- Hydrological Society of South Australia (HSSA)
- Irrigation Association of Australia (IAA)
- Murray-Darling Association (MDA) for Conservation and Sustainable Development
- Murray-Darling Wetlands Association (MDWA)
- Murray Wetlands Working Group (MWWG)
- Save the Murray
- Stormwater Industry Association (SIA)
Bangladesh
Canada
- Alberta Land-Use Knowledge Network (ALUKN)
- Alberta Water and Wasetwater Operators Association (AWWOA)
- Association Québécoise pour le Contrat Mondial de l'Eau (AQCME or ACME-Québéc)
- The Big Wild
- Canada West Foundation (CWF)
- Canadian Biosolids Partnership (CBP)
- Canadian Boreal Initiative (CBI)
- Canadian Geographic
- Canadian Parks and Wilderness Society (CPAWS)
- Canadian Rivers Institute (CRI)
- Canadian Society for Ecological Economics (CANSEE)
- Canadian Water and Wastewater Association (CWWA)
- Canadian Water Efficiency Partnership (CWEP)
- Canadian Water Network
- Centre for Indigenous Environmental Resources (CIER)
- Council of Canadians
- Manitoba Water & Wastewater Association (MWWA)
- Nature Canada
- Nature Conservancy Canada (NCC)
- Nature Trust of British Columbia (NTBC)
- Northern Territories Water and Waste Association (NTWWA)
- Saskatchewan Water and Wastewater Association (SWWA)
- Southeast Alberta Watershed Alliance (SEAWA)
- Western Canada Municipal Service and Suppliers Association (WCMSSA)
- Western Canada Section of the American Water Works Association (WCS-AWWA)
- Western Canada Water
- Western Canada Water Environment Association (WCWEA)
China
- Chinese Academy of Sciences (CAS)
- Institute of Mountain Hazards and Environment (IMHE)
- Cold and Arid Regions Environment and Engineering Research Institute (CAREERI)
India
- Centre for Science and Environment (CSE)
- India Biodiversity Portal (IBP)
- India Energy Portal (IEP)
- India Environment Portal (IEP)
- India Water Portal (IWP), also in Hindi and Kannada
- Indian Desalination Association (IDA)
- Indian Society for Ecological Economics (INSEE)
- Indian Water Works Association (IWWA)
- Pratham
Italy
- Associazione Geofisica Italiana
- Associazione Italiana die AgroMeteorologia
- Contratto Mondiale sull'Acqua (CMA or ACME-Italia)
- Societá Meteorologica Italiana
- Unione Meteorologica del Friuli Venezia Giulia
Korea
Russia
- Russian Academy of Sciences
- Russian Society for Ecological Economics (RSEE)
- Russian Water Association (RWA)
Singapore
South Africa
- Anti-Privatisation Forum (APF)
- South African National Energy Association (SANEA)
- South African Wind Energy Association (SAWEA)
- Water Research Commission (WRC)
Spain
Sweden
- Beijer Institute of Ecological Economics
- Stockholm Resilience Centre (SRC)
- Svenska Meteorologiska Sällskapet
Switzerland
- Center for Security Studies (CSS)
- Swiss Association pour le Contrat Mondial de l'Eau (ACME-Suisse)
- Schweizerische Meteorologische Gesellschaft
United Kingdom
- British Ecological Society (BES)
- British Hydrological Society (BHS)
- British Royal Geographical Society (RGS), including the Institute for British Geographers (IBG)
- British Royal Meteorological Society (RMetS)
- Chartered Institution of Water and Environmental Management (CIWEM)
- Consumer Council for Water (CCW)
- Living with Environmental Change (LWEC)
- Natural England (NE)
- Water, Engineering and Development Centre (WEDC)
United States
- 1 Mississippi Campaign
- Advisory Committee on Water Information (ACWI)
- Aldo Leopold Foundation (ALF)
- Aldo Leopold Wilderness Research Institute (ALWRI)
- Alliance for Innovation
- Alliance for Sustainable Built Environments (ASBE)
- Alliance for Water Efficiency (AWE)
- American Academy of Environmental Engineers (AAEE)
- American Academy of Water Resources Engineers (AAWRE)
- American Association for the Advancement of Science (AAAS)
- American Association of Engineering Societies (AAES)
- American Filtration & Separation Society (AFSS)
- American Fisheries Society (AFS)
- American Forests
- American Geographical Society (AGS)
- American Geological Institute (AGI)
- American Geophysical Union (AGU)
- American Geosciences Institute (AGI)
- American Ground Water Trust (AGWT)
- American Institute of Hydrology (AIH)
- American Land Conservancy (ALC)
- American Membrane Technology Association (AMTA)
- American Public Works Association (APWA)
- American Red Cross
- American Rivers
- American Society for Environmental History (ASEH)
- American Society for Photogrammetry and Remote Sensing (ASPRS)
- American Society of Agricultural and Biological Engineers (ASABE)
- American Society of Agronomy (ASA)
- American Society of Civil Engineers (ASCE)
- American Society of Irrigation Consultants (ASIC)
- American Meteorological Society (AMS)
- American Water Resources Association (AWRA)
- American Water Works Association (AWWA)
- American Whitewater
- Association for Environmental Studies and Sciences (AESS)
- Association for Women Geoscientists (AWG)
- Association of Metropolitan Planning Organizations (AMPO)
- Association of Metropolitan Water Agencies (AMWA)
- Association of Public and Land-grant Universities (APLU)
- Association of State Dam Safety Officials (ASDSO)
- Association of State Drinking Water Administrators (ASDWA)
- Association of State Floodplain Managers (ASFPM)
- Association of State Wetland Managers (ASWM)
- Biodiversity Project
- Campaign for America's Wilderness (CAW)
- Cary Institute of Ecosystem Studies (CIES)
- Center for Public Integrity (CPI)
- Center for Watershed Protection (CWP)
- Change.org
- Clean Water Action (CWA)
- Clean Water America Alliance (CWAA)
- Clean Water Fund (CWF)
- Clean Water Network (CWN)
- Coalition on the Public Understanding of Science (COPUS)
- Community Collaborative Rain, Hail and Snow (CoCoRaHS) Network
- Consortium of Universities for the Advancement of Hydrologic Science, Inc. (CUAHSI)
- Council for the Advancement of Science Writing (CASW)
- Council on Food, Agricultural, and Resource Economics (C-FARE)
- Critical Zone Exploration Network (CZEN)
- Crop Science Society of America (CSSA)
- Earth Day Coalition (EDC)
- Earthjustice
- Ecological Society of America (ESA)
- Environment America
- Environmental Defense Fund (EDF)
- Environmental Law Institute (ELI)
- Farm Foundation
- Food & Water Watch (FWW)
- Freshwater Society
- Geological Society of America (GSA)
- Ground Water Protection Council (GWPC)
- Groundwater Foundation
- Heritage Forests Campaign (HFC)
- Hydro Research Foundation (HRF)
- The Infrastructure Security Partnership (TISP)
- International Association for Landscape Ecology, U.S. Chapter (US-IALE)
- Irrigation Association (IA)
- The Johnson Foundation at Wingspread
- Land Trust Alliance (LTA)
- Leave No Trace (LNT)
- National Association of Clean Water Agencies (NACWA)
- National Association of Conservation Districts (NACD)
- National Association of Environmental Professionals (NAEP)
- National Association of Flood and Stormwater Management Agencies (NAFSMA)
- National Association of RC&D Councils (NARCDC)
- National Association of Regional Councils (NARC)
- National Association of Regulatory Utility Commissioners (NARUC)
- National Association of Science Writers (NASW)
- National Association of State Foresters (NASF)
- National Association of Water Companies (NAWC)
- National Audubon Society
- National Conservation System Foundation (NCSF)
- National Council for Public-Private Partnerships (NCPPP)
- National Council for Science and the Environment (NCSE)
- National Ecological Observatory Network (NEON)
- National Environmental Health Association (NEHA)
- National Environmental Information Exchange Network (NEIEN)
- National Forest Foundation (NFF)
- National Ground Water Association (NGWA)
- National Hydrologic Warning Council (NHWC)
- National Hydropower Association (NHA)
- National Institutes for Water Resources (NIWR)
- National League of Cities (NLC)
- National Onsite Wastewater Recycling Association (NOWRA)
- National Parks Conservation Association (NPCA)
- National Rural Water Association (NRWA)
- National Utility Contractors Association (NUCA)
- National Water Quality Monitoring Council (NWQMC)
- National Water Research Institute (NWRI)
- National Water Resources Association (NWRA)
- National Waterways Conference (NWC)
- National Waterways Foundation (NWF)
- National Weather Association (NWA)
- National Wildlife Federation (NWF)
- Natural Hazard Mitigation Association (NHMA)
- Natural Resources Defense Council (NRDC)
- The Nature Conservancy (TNC)
- New Water Supply Coalition (NWSC)
- Northeast - Midwest Institute (NEMWI)
- Partnership for Critical Infrastructure Security (PCIS)
- Project WET
- Public Lands Foundation (PLF)
- Resources for the Future (RFF)
- River Network
- Society for Science and the Public (SSP)
- Society of American Military Engineers (SAME)
- Society of Environmental Journalists (SEJ)
- Society of Wetland Scientists (SWS)
- Soil and Water Conservation Society (SWCS)
- Soil Science Society of America (SSSA)
- Trout Unlimited (TU)
- Trust for Public Land (TPL)
- Union of Concerned Scientists (UCS)
- U.S. Agricultural Information Network (USAIN)
- U.S. Geospatial Intelligence Foundation (USGIF)
- U.S. Green Chamber of Commerce (USGCC)
- U.S. Society for Ecological Economics (USSEE)
- U.S. Society on Dams (USSD)
- Urban Water Institute (UWI)
- Water and Wastewater Equipment Manufacturers Association (WWEMA)
- Water Environment Federation (WEF)
- Water Quality Association (WQA)
- Water Research Foundation (WaterRF), formerly the American Water Works Association Research Foundation (AWWARF)
- Water Systems Council (WSC)
- Water Utility Climate Alliance (WUCA)
- WateReuse Association and WateReuse Foundation
- Waterways Council, Inc. (WCI)
- Weather Research Center (WRC)
- The Wilderness Society
- Wilderness Watch
Northwest U.S.
- Bear River Commission (BRC)
- Center for Columbia River History (CCRH)
- Columbia Basin Bulletin
- Columbia Basin Fish & Wildlife Authority (CBFWA)
- Columbia Bird Research (CBR)
- Columbia River Inter-Tribal Fish Commission (CRITFC)
- Columbia Riverkeeper
- Fish Passage Center (FPC)
- For the Sake of Salmon (FSOS)
- Lower Columbia River Estuary Program (LCREP)
- Native Fish Society (NFS)
- Northwest FishWeb
- Northwest Habitat Institute (NWHI)
- Northwest Power and Conservation Council (NWPCC)
- Northwest Power Planning Council (NWPPC)
- Pacific Fisheries Management Council (PFMC)
- Pacific Marine Conservation Council (PMCC)
- Pacific Rivers Council (PRC)
- Pacific States Marine Fisheries Commission (PSMFC)
- Salmon Aid
- StreamNet
- Western RC&D Association (WRCDA)
- Western Resource Advocates (WRA)
- Western Watersheds Project (WWP)
Southwest U.S.
- ALERT User's Group (AUG)
- Center for Biological Diversity (CBD)
- Chihuahuan Desert Education Coalition (CDEC)
- Coalition for Sonoran Desert Protection (CSDP)
- Colorado River Regional Sewer Coalition (CRRSCo)
- Colorado River Water Users Association (CRWUA)
- Conservation System Alliance (CSA)
- Desert Foothills Land Trust (DFLT)
- Floodplain Management Association (FMA) (covering California, Hawaii and Nevada)
- Glen Canyon Institute (GCI)
- Grand Canyon Trust (GCT)
- Grand Canyon Wildlands Council (GCWC)
- Grand Canyon Wolf Recovery Project (GCWRP)
- Great Basin Water Network (GBWN)
- Multi-State Salinity Coalition (MSSC)
- Powell Consortium
- The Quivira Coalition
- Sonoran Institute
- Southwest Membrane Operators Association (SWMOA), affiliated with the AMTA (see above)
- Southwest Sustainable Forests Partnership (SWSFP)
- Southwest Vegetation Management Association (SWVMA)
- Southwest Wildlife Conservation Center (SWCC)
- Southwestern Association of ALERT Systems (SAAS)
- Tamarisk Coalition (TC)
- Western Center for Monitoring and Assessment of Freshwater Ecosystems (WMC)
- Western Coalition of Arid States (WESTCAS)
- Western Governors' Association (WGA)
- Western RC&D Association (WRCDA)
- Western Resource Advocates (WRA)
- Western Waters Digital Library (WWDL)
- Western Watersheds Project (WWP)
- WildEarth Guardians
Rocky Mountains U.S.
- Great Basin Water Network (GBWN)
- Tamarisk Coalition (TC)
- Western Coalition of Arid States (WESTCAS)
- Western RC&D Association (WRCDA)
- Western Resource Advocates (WRA)
- Western Watersheds Project
Southern Plains U.S.
Great Lakes U.S.
- Freshwater Future
- Great Lakes Aquatic Habitat Network & Fund
- Great Lakes Commission (GLC)
- Great Lakes Cities Initiative (GLCI)
- Great Lakes Environmental Law Center (GLELC)
- Great Lakes Fishery Commission (GLFC)
- Great Lakes Information Network (GLIN)
- Great Lakes Protection Fund (GLPF)
- Great Lakes Sea Grant Network (GLSGN)
- Great Lakes Sport Fishing Council (GLSFC)
- Great Lakes United
- Great Lakes Urban Exchange (GLUE)
- Lake Michigan Federation
- Lake Superior Streams (LSS)
Northeast U.S.
- Alliance for the Chesapeake Bay (ACB)
- Chesapeake Bay Commission (CBC)
- Chesapeake Bay Foundation (CBF)
- Chesapeake Bay Program (CBP)
- Chesapeake Bay Student Network (CBSN)
- Chesapeake Bay Trust (CBT)
- Delaware River Basin Commission (DRBC)
- Delaware Riverkeeper
- Eastern Water Quality Association (EWQA)
- Housatonic Valley Association (HVA)
- Housatonic River Initiative (HRI), also the Housatonic Riverkeeper
- Partnership for the Delaware Estuary (PDE)
- Susquehanna River Basin Commission (SRBC)
- Upper Susquehanna Coalition (USC)
- Vernal Pool Association (VPA)
Southeast U.S.
Alabama
Arizona
- Arizona Archaeological Society (AAS)
- Arizona Association of Environmental Professionals (AZAEP)
- Arizona Clean and Beautiful
- Arizona Conservation Partnership (ACP)
- Arizona Floodplain Management Association (AZFMA)
- Arizona Hydrological Society (AHS)
- Arizona Investment Council (AIC)
- Arizona Land and Water Trust (ALWT)
- Arizona Municipal Water Users Association (AMWUA)
- Arizona Riparian Council (ARC)
- Arizona Rivers
- Arizona Water Association (AWA), formerly the Arizona Water and Pollution Control Association (AWPCA), affiliated with the AWWA and WEF (see above)
- Arizona Water Protection Fund (AWPF)
- Arizona Water Well Association (AzWWA), affiliated with the WSC (see above)
- Arizona Wilderness Coalition (AWC)
- Cienega Watershed Partnership (CWP)
- Environmental Fund for Arizona (EFAZ)
- National Utility Contractors Association (NUCA) of Arizona
- Rural Water Association of Arizona (RWAA), formerly the Arizona Small Utilities Association (ASUA), affiliated with the NRWA (see above)
- Sky Island Alliance
- Southern Arizona Water Utilities Association (SAWUA)
- Sustainable Arizona
- Water Utility Association of Arizona (WUAA)
Arkansas
- Arkansas Floodplain Management Association (AFMA)
- Arkansas Fly Fishers (AFF)
- Arkansas Watershed Advisory Group (AWAG)
- Beaver Water District (BWD)
- Caddis Fly Fishers (CFF)
- Elk River Watershed Improvement Association (ERWIA)
- Friends of the North Fork and White Rivers (FNFWR)
- Kings River Watershed Partnership (KRWP)
- North Arkansas Fly Fishers (NAFF)
- Northeast Arkansas Flyfishers (NEAFF)
- Watershed Conservation Resource Center (WCRC)
- White River Trout Unlimited, Chapter #698
California
- Alameda Creek Alliance (ACA)
- Aquarium of the Bay
- Association of California Water Agencies (ACWA)
- Bay Institute
- California Coastal Coalition (CCC)
- California Urban Water Conservation Council (CUWCC)
- Central Valley Habitat Joint Venture
- Community Clean Water Institute (CCWI)
- Floodplain Management Association (FMA) (covering California, Hawaii and Nevada)
- Friends of the Eel River (FER)
- Friends of the Gualala River (FoGR)
- Friends of the Los Angeles River
- Heal the Bay
- Institute for Fisheries Resources (IFR)
- Klamath RiverKeeper
- Point Reyes Bird Observatory (PRBO)
- Riparian Habitat Joint Venture (RHJV)
- Salmon Protection and Watershed Network (SPAWN)
- San Diego County Water Authority (SDCWA)
- San Francisco Bay Joint Venture (SFBJV)
- San Francisco BayKeeper (SFBK)
- San Francisco Estuary Institute (SFEI)
- South Yuba River Citizens League (SYRCL)
- Southern California Wetlands Recovery Project (SCWRP)
- Tuolumne River Trust (TRT)
- Water Education Foundation
Colorado
- Basalt Water Conservancy District (BWCD)
- Central Colorado Water Conservation District (CCWCD)
- Colorado Foundation for Water Education (CFWE)
- Colorado River Water Conservation District (CRWCD)
- Colorado Rural Development Council (CRDC)
- Colorado Wastewater Utility Council (CWWUC)
- Colorado Water Congress (CWC)
- Colorado Water Protection Project (CWPP)
- Colorado Water Quality Forum (CWQF)
- Colorado Watershed Assembly (CWA)
- Dolores Water Conservancy District (DWCD)
- Northern Colorado Water Conservancy District (NCWCD)
- Pagosa Area Water and Sanitation District (PAWSD)
- Roaring Fork Conservancy (RFC)
- San Juan Water Conservancy District (SJWCD)
- Southeastern Colorado Water Conservancy District
- Southwestern Water Conservation District
- Water Information Program (WIP)
Idaho
- Idaho Association of Soil Conservation Districts (IASCD)
- Idaho Rivers United (IRU)
- Idaho Water Users Association (IWUA)
- Portneuf Soil and Water Conservation District (PSWCD)
Illinois
- Association of Illinois Soil and Water Conservation Districts (AISWCD)
- Illinois Association for Floodplain and Stormwater Management (IAFSM)
- North River Commission (NRC)
- Stephenson Soil & Water Conservation District
Indiana
- Indiana Association of Soil & Water Conservation Districts
- Johnson County Soil and Water Conservation District
- Blue River Commission (BRC)
Maine
- Acton Wakefield Watersheds Alliance (AWWA)
- Androscoggin Valley Soil and Water Conservation District (AVSWCD)
- Central Aroostook Soil and Water Conservation District (CASWCD)
- Cumberland County Soil and Water Conservation District (CCSWCD)
- Franklin County Soil and Water Conservation District (FCSWCD)
- Hancock County Soil and Water Conservation District (HCSWCD)
- Kennebec County Soil and Water Conservation District (KCSWCD)
- Knox-Lincoln Soil and Water Conservation District (KLSWCD)
- Maine Association of Conservation Districts (MACD)
- Penobscot County Soil and Water Conservation District (PCSWCD)
- Piscataquis County Soil and Water Conservation District (PCSWCD)
- Somerset County Soil and Water Conservation District (SCSWCD)
- Southern Aroostook Soil and Water Conservation District (SASWCD)
- St. John Valley Soil and Water Conservation District (SJVSWCD)
- Washington County Soil and Water Conservation District (WCSWCD)
- York County Soil and Water Conservation District (YCSWCD)
Maryland
- Patuxent River Commission (PRC)
- Wicomico Scenic River Commission (WSRC)
- Severn River Commission (SRC)
Minnesota
- Cannon River Watershed Partnership
- Clean Water Minnesota
- Goodhue County Soil and Water Conservation District
- Lake Access
- Lower Minnesota River Watershed District
- Metropolitan Council
- Minnesota Association of Conservation District Employees
- Minnesota Association of Soil & Water Conservation Districts
- Minnesota Association of Watershed Districts (MAWD)
- Minnesota Erosion Control Association (MECA)
- Minnesota Lakes Association (MLA)
- Minnesota Waters
- Mississippi Headwaters Board (MHB)
- Prior Lake / Spring Lake Watershed District
- Scott County Soil & Water Conservation District
- Red River Watershed Management Board (RRWMB)
- Rice Soil and Water Conservation District
- Rivers Council of Minnesota (RCM)
- Zumbro Watershed Partnership
Missouri
- Bryant Watershed Education Project
- Elk River Watershed Improvement Association (ERWIA)
- James River Basin Partnership (JRBP)
- Lake of the Ozarks Watershed Alliance (LOWA)
- Lakes Of Missouri Volunteer Program (LMVP)
- Missouri Association of Soil and Water Conservation Districts (MASWCD)
- Missouri River Communities Network (MRCN)
- Missouri River Hills (MRH) Conservation Opportunity Area (COA)
- Missouri Smallflows Organization (MSFO)
- Missouri Stream Team (MST)
- Missouri Watershed Information Network (MoWIN)
- No MOre Trash!
- Ozark Fly Fishers (OFF)
- OzarksEnvironment.com
- Table Rock Lake Water Quality (TRLWQ)
- Upper White River Basin Foundation (UWRBF)
- Watershed Committee of the Ozarks (WCO)
Montana
- Association of Conservation Districts (MACD)
- Montana Watercourse
- Montana Water Trust (MWT)
- Montana Watershed Coordination Council (MWCC)
Nevada
- Colorado River Commission (CRC)
- Floodplain Management Association (FMA) (covering California, Hawaii and Nevada)
New Hampshire
New Jersey
- EarthShare New Jersey (ESNJ)
- Edison Wetlands Association (EWA)
- Natural Lands Trust (NLT)
- New Jersey Outdoor Alliance (NJOA)
- Wetlands Institute
- Wild New Jersey (WNJ)
- NY/NJ BayKeeper
New York
- Chemung County Soil & Water Conservation District (CCSWCD)
- Chemung Valley Conservancy (CVC)
- Delaware County Soil and Water Conservation District (DCSWCD)
- Hudson Riverkeeper
- Finger Lakes Land Trust (FLLT)
- Finger Lakes Resource Conservation & Development Council (FLRCDC)
- Soil and Water Conservation Committee (SWCC)
- Southern Tier Central Regional Planning and Development Board (STCRPDB)
- Tompkins County Soil & Water Conservation District (TCSWCD)
- The Wetland Trust (TWT)
Ohio
- Alliance for Watershed Action and Resource Education (AWARE)
- Belmont Soil and Water Conservation District (BSWCD)
- Hocking River Commission (HRC)
- Mahoning Soil and Water Conservation District (MSWCD)
- Ohio Stormwater Association (OSA)
- Summit Soil and Water Conservation District (SSWCD)
- Tinkers Creek Watershed Partners (TCWP)
Oklahoma
- Elk River Watershed Improvement Association (ERWIA)
- Illinois River Watershed Partnership (IRWP)
- Oklahoma Floodplain Managers Association (OFMA)
- Oklahoma Scenic Rivers (OKSR)
- Save the Illinois River (SIR)
Oregon
- Clean Water Services (CWS)
- EarthShare Oregon (ESO)
- Network of Oregon Watershed Councils (NOWC)
- Oregon Association of Conservation Districts (OACD)
- Oregon Natural Desert Association (ONDA)
- Oregon Watershed Enhancement Board (OWEB)
- Tualatin River Watershed Council (TRWC)
- Tualatin Soil and Water Conservation District (TSWCD)
- Washington County Small Woodlands Association (WCSWA)
Pennsylvania
- Brandywine Conservancy (BC)
- Brandywine Valley Association (BVA)
- Bucks County Conservation District (BCCD)
- Canaan Valley Institute (CVI)
- Chester - Ridley - Crum Watersheds Association (CRC)
- Engineers' Society of Western Pennsylvania (ESWP)
- Environmental Advisory Councils Network (EACN)
- Green Valleys Assocation (GVA)
- Lehigh County Conservation District (LCCD)
- Montgomery County Conservation District (MCCD)
- Montgomery County Lands Trust (MCLT)
- Natural Lands Trust (NLT)
- Pennsylvania Alliance for Environmental Education (PAEE)
- Pennsylvania Center for Environmental Education (PCEE)
- Pennsylvania Council of Trout Unlimited (PCTU)
- Pennsylvania Environmental Council (PEC)
- Pennsylvania Organization for Watersheds and Rivers (POWR)
- Pennypack Greenway Partnership (PGP)
- Perkiomen Watershed Conservancy (PWC)
- The Schuylkill Center (TSC)
- StormwaterPA
- Stroud Water Research Center (SWRC)
- Western Pennsylvania Conservancy (WPC)
Virginia
- Rappahannock River Basin Commission (RRBC)
- Virginia Watersheds Alliance (VWA)
- Culpeper Soil & Water Conservation District (CSWCD)
- Hanover-Caroline Soil & Water Conservation District (HCSWCD)
- Virginia Association of Soil & Water Conservation Districts (VASWCD)
- York River and Small Coastal Basins Roundtable (YRSCBR)
- John Marshall Soil and Water Conservation District (JMSWCD)
- Tidewater Soil and Water Conservation District (TSWCD)
- Tri-County/City Soil and Water Conservation District (TCCSWCD)
- Friends of the North Fork of the Shenandoah River (FNFSR)
Washington
- Chelan County Public Utility District (CCPUD)
- Douglas County Public Utility District (DCPUD)
- Grant County Public Utility District (GCPUD)
- Pacific Mountain Alliance for Innovation (PMAI)
- Friends of the Cowlitz
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