Water and Sanitation Organizations
- Africa Now
- Africare
- Agua Para La Vida
- Aqua Partners International
- Aquaya Institute
- Blue Planet Run
- CARE
- Catholic Relief Services
- Church World Service
- Earth Institute at Columbia University
- El Porvenir
- Emmanuel International
- Emory Global Center for Safe Drinking Water
- Engineering Ministeries International
- Episcopal Relief and Development
- Global Environment & Technology Foundation
- Global Water
- Healing Waters International
- Hermandad
- Lifewater
- Living Water International
- Living Waters for the World
- Millennium Water Alliance
- Oxfam America
- Pacific Institute
- PlayPumps International
- Population Services International
- Rotary International
- Sister Cities International
- Synergos
- The ClearWater Project
- The Steve and Jean Case Foundation
- The World Bank Water and Sanitation Program (WSP)
- United Nations International 'Water for Life' Decade, 2005-2015
- United Nations Foundation
- U.S. Agency for International Development
- U.S. Centers for Disease Control
- Water Advocates
- WaterAid US
- WaterAid UK
- Waterlines
- WaterPartners International
- WaterPlus
- Water Education Foundation
- Water For People
- Water Missions International
- Water Monitoring Alliance
- Water Supply and Sanitation Collaborative Council
- Wherever the Need
- World Health Organization
- World Vision International
- World Water Council Water Action Unit