GWP‑WA operates in 15 countries of the region: Benin, Burkina Faso, Capo Verde, Côte d’Ivoire, Gambia, Ghana, Guinea, Guinea Bissau, Liberia, Mali, Niger, Nigeria, Senegal, Sierra Leone and Togo. It operates through 13 Country Water Partnerships (CWPs). Liberia and Sierra Leone do not yet have CWPs.
