You can find out what Cal Water district you are in by locating the name of your city, community, or water system in the list below. If you prefer—or if your area is not listed—you can find your district using your address. Note that Cal Water only serves portions of some of the areas on this list.
| City/Community/Water System | District |
|---|---|
| Antelope Valley | Antelope Valley |
| Arden | Kern River Valley |
| Armstrong Valley | Redwood Valley |
| Atherton | Bear Gulch |
| Bakersfield | Bakersfield |
| Bayshore | Bayshore |
| Bear Gulch | Bear Gulch |
| Bell | East Los Angeles |
| Bodfish | Kern River Valley |
| Bolsa Knolls | Salinas |
| Broadmoor | Bayshore |
| Buena Vista | Salinas |
| Camp Erwin Owens | Kern River Valley |
| Carson | Rancho Dominguez |
| Chico | Chico |
| Coast Springs | Redwood Valley |
| Colma | Bayshore |
| Commerce | East Los Angeles |
| Compton | Rancho Dominguez |
| Country Meadows | Salinas |
| Countrywood | Kern River Valley |
| Cupertino | Los Altos Suburban |
| Daly City | Bayshore |
| Dillon Beach | Redwood Valley |
| Dixon | Dixon |
| Dominguez | Rancho Dominguez |
| Duncans Mills | Redwood Valley |
| East Los Angeles | East Los Angeles |
| Fairway | Visalia |
| Foothill Estates | Salinas |
| Fremont Valley | Antelope Valley |
| Goshen | Visalia |
| Grand Oaks | Antelope Valley |
| Guerneville | Redwood Valley |
| Hamilton City | Chico |
| Harbor City | Rancho Dominguez |
| Hawkins | Redwood Valley |
| Hawthorne | Rancho Dominguez |
| Hermosa Beach | Rancho Dominguez |
| Indian Springs | Salinas |
| Kern River Valley | Kern River Valley |
| Kernville | Kern River Valley |
| King City | King City |
| Kings Mountain | Bear Gulch |
| Lake Hughes | Antelope Valley |
| Lake Isabella | Kern River Valley |
| Lakeland | Kern River Valley |
| Lancaster | Antelope Valley |
| Las Lomas | Salinas |
| Las Palmas | Salinas |
| Leona Valley | Antelope Valley |
| Livermore | Livermore |
| Lomita | Rancho Dominguez |
| Los Altos | Los Altos Suburban |
| Los Altos Hills | Los Altos Suburban |
| Los Angeles | East Los Angeles |
| Los Trancos | Bear Gulch |
| Lucerne | Redwood Valley |
| Marysville | Marysville |
| Menlo Park | Bear Gulch |
| Mid-Peninsula | Bayshore |
| Montebello | East Los Angeles |
| Monterey Park | East Los Angeles |
| Mountain Shadows | Kern River Valley |
| Mountain View | Los Altos Suburban |
| Mullen | Visalia |
| Noel Heights | Redwood Valley |
| North Garden | Bakersfield |
| Oak Hills | Salinas |
| Oak Ranch | Visalia |
| Onyx | Kern River Valley |
| Oroville | Oroville |
| Palomar Park | Bayshore |
| Palos Verdes Peninsula | Rancho Dominguez |
| Ponderosa Pine | Kern River Valley |
| Porterville | Visalia |
| Portola Valley | Bear Gulch |
| Rancho del Paradiso | Redwood Valley |
| Rancho Dominguez | Rancho Dominguez |
| Redondo Beach | Rancho Dominguez |
| Redwood City | Bear Gulch |
| Redwood Valley | Redwood Valley |
| Riverkern | Kern River Valley |
| Rolling Hills | Rancho Dominguez |
| Salinas | Salinas |
| Salinas Hills | Salinas |
| San Carlos | Bayshore |
| San Mateo | Bayshore |
| Santa Rosa | Redwood Valley |
| Selma | Selma |
| Sierra Trailer Lodge | Kern River Valley |
| Skyline | Bear Gulch |
| South Lake | Kern River Valley |
| South San Francisco | Bayshore |
| Split Mountain | Kern River Valley |
| Squirrel Mountain | Kern River Valley |
| Stockton | Stockton |
| Sunnyvale | Los Altos Suburban |
| Thousand Oaks | Westlake |
| Toro Park | Salinas |
| Torrance | Rancho Dominguez |
| Travis Air Force Base | Travis |
| Tulare | Visalia |
| Tulco | Visalia |
| Vernon | East Los Angeles |
| Visalia | Visalia |
| Watsonville | Salinas |
| West Basin | Rancho Dominguez |
| Westlake Village | Westlake |
| Willows | Willows |
| Wofford Heights | Kern River Valley |
| Woodside | Bear Gulch |
