- Agua Caliente Band of Cahuilla Indians
- Castaic Lake Water Agency
- City of Coachella
- City of Newport Beach
- City of Vernon
- City of Walnut
- Los Angeles County Metropolitan Transportation Authority
- San Manuel Band of Mission Indians
- Santa Ynez Band of Chumash Indians
- Twenty-Nine Palms Band of Mission Indians
- Yorba Linda Water District
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