US NGOs (some with international offices)
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- Peace Corps (operated by US government)
- Blumont (formerly International Relief and Development)
- Tetra Tech (formerly Associates for Rural Development)
- Population Services International
- Catholic Relief Services
- Water for People
- Water.org
- Nuru International
- OneAcre Fund
- The Aquaya Institute
- Global Environment & Technology Foundation
- Technoserve
- Innovations for Poverty Action
- World Vision
- CARE
- World Resources Institute