| Anaheim City |
| Banning City |
| Beaumont Cherry Valley Water District |
| Big Bear City Community Services District |
| Big Bear Lake City |
| Box Springs Mutual Water Company |
| Brea City |
| Buena Park City |
| Chino City |
| Chino Hills City |
| Colton City |
| Corona City |
| County Water Company |
| Cucamonga Valley Water District |
| Eagle Valley Mutual Water Company |
| East Orange County Water District |
| East Valley Water District |
| Eastern Municipal Water District |
| El Toro Water District |
| Elsinore Valley Municipal Water District |
| Fern Valley Water District |
| Fontana Water Company |
| Fountain Valley City |
| Fullerton City |
| Garden Grove City |
| Golden State Water Company - Claremont |
| Golden State Water Company - Cowan Heights |
| Golden State Water Company - Placentia |
| Golden State Water Company - West Orange |
| Hemet City Water Department |
| Home Gardens County Water District |
| Huntington Beach City |
| Idyllwild Municipal Water District |
| Irvine Ranch Water District |
| Jurupa Community Services District |
| La Habra City |
| La Palma City |
| Lake Hemet Water District |
| Lee Lake Water District |
| Loma Linda City |
| Marigold Mutual Water Company |
| Mesa Consolidated Water Distict |
| Monte Vista Water District |
| Muscoy Mutual Water Company |
| Newport Beach City |
| Norco City |
| Nuevo Water Company |
| Ontario City |
| Orange City |
| Perris City Water Department |
| Pine Cove Water District |
| Pomona City |
| Rancho California Water District |
| Redlands City |
| Rialto City |
| Riverside City |
| Riverside Highland Water Company |
| Rubidoux Community Services District |
| Running Springs Water District |
| San Antonio Water Company |
| San Bernardino City |
| San Jacinto City |
| Santa Ana City |
| Santa Ana River Water Company |
| Seal Beach City |
| Serrano Water District |
| South Mesa Water Company |
| Terrace Water Company |
| Tustin City |
| Upland City |
| West Valley Water District |
| Western Heights Water Company |
| Western Municipal Water District |
| Westminster City |
| Yorba Linda Water District |
| Yucaipa Valley Water District |
| <all other values> |
