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- Agua Para el Pueblo (as explained above)
- CARE international (in Honduras and Nicaragua)
- ACRA: Associazione di Cooperazione Rurale in Africa ed America Latina (an Italian NGO)
- SI: Solidaridad Internacional (a Spanish NGO)
- COSUDE: Cooperación Suiza de Desarrollo (Swiss Development Cooperation)
- INFOM: Guatemalan Municipal Development Institute
- the Water Boards in charge of the five AguaClara facilities in Honduras and the association of water boards that they have formed
- the Sanjuan Foundation
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