CWSA brings together small and mid-sized water systems with some larger water systems and cities that want to help their communities across the state of California. Our members include:
- Bighorn-Desert View Water Agency
- Twentynine Palms Water District
- Santa Margarita Water District
- Las Virgenes Municipal Water District
- City of Watsonville
- North of the River Municipal Water District
- Mesa Water District
- Coachella Valley Water District
- Water Replenishment District of Southern California
- Mojave Water Agency
- City of Los Banos
- Indio Water Authority
- Hi-Desert Water District
- Joshua Basin Water District
- San Gorgonio Pass Water Agency
- Yorba Linda Water District
- Pico Water District