Participating Water Agencies Burlingame, City of California Water Service Chino Hills, City of Chino, City of Corona, City of Cucamonga Valley Water District Elsinore Valley Municipal Water District Jurupa Community Services District Millbrae, City of Monte Vista Water District Norco, City of Ontario, City of Redwood City, City of Riverside Public Utilities Rubidoux Community Services District San Dieguito Water District Santa Barbara, City of Santa Clarita Water Division Sweetwater Authority Temescal Valley Water District The Farm Mutual Water Company Upland, City of Valencia Water Company Western Municipal Water District