Public Water Systems
7,249 active public water systems in CA, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.
| System Name | Location | Population | Violations | PFAS |
|---|---|---|---|---|
| Ventura Cwwd No. 38 - Lake Sherwood | Moorpark, CA | 1,759 | 0 | - |
| Harris Ranch Restaurant | Coalinga, CA | 1,750 | 174 | - |
| Home Garden Csd | Hanford, CA | 1,750 | 160 | - |
| Caltrans Camp Roberts Rsra Nb | San Luis Obispo, CA | 1,750 | 38 | - |
| Penngrove Water Company (Puc) | Santa Rosa, CA | 1,742 | 19 | - |
| Woodville Public Utility Dist | Tulare, CA | 1,740 | 19 | - |
| Le Grand Comm Services Dist | Le Grand, CA | 1,739 | 28 | - |
| Seeley Cwd | Seeley, CA | 1,729 | 131 | - |
| Golden State Water Co - Morongo del Sur | Apple Valley, CA | 1,717 | 10 | - |
| Cal American WC - Rio Plaza | Rosemead, CA | 1,709 | 11 | - |
| Dunsmuir, City Of | Dunsmuir, CA | 1,707 | 22 | - |
| Branch Center [Sws] | Sacramento, CA | 1,700 | 2 | - |
| Mt Baldy Homeowners Assn. | Mt. Baldy, CA | 1,700 | 19 | - |
| Cal Am - Isleton | Sacramento, CA | 1,693 | 1 | - |
| Pcwa - Weimar | Auburn, CA | 1,689 | 4 | - |
| Del Oro Water Co-Ferndale | Chico, CA | 1,662 | 0 | - |
| Westwood C.s.d. | Westwood, CA | 1,662 | 14 | - |
| Castle Airport | Merced, CA | 1,650 | 15 | - |
| Prunedale Shopping Center WS | Larkspur, CA | 1,650 | 34 | - |
| Madera Co Cmd19-Parkwood | Madera, CA | 1,637 | 14 | - |
| Avila Beach Community Services District | Avila Beach, CA | 1,630 | 0 | - |
| Hilmar Cheese Company | Hilmar, CA | 1,629 | 14 | - |
| Biola Community Services Dist | Biola, CA | 1,623 | 61 | - |
| Csp - Angel Island St Park | Petaluma, CA | 1,622 | 0 | - |
| Brannan Island State Rec. Area | Clayton, CA | 1,622 | 5 | - |
| Liberty Utilities - Mesa Crest | Downey, CA | 1,619 | 0 | - |
| Richgrove Community Services District | Richgrove, CA | 1,617 | 154 | - |
| Los Alamitos Race Course | Los Alamitos, CA | 1,600 | 18 | - |
| Smwd-Nichols Institute | Rancho Santa Margarita, CA | 1,600 | 2 | - |
| Forest Home Christian Cc | Forest Falls, CA | 1,600 | 26 | - |
| Cal Trans - Fenner | San Bernardino, CA | 1,600 | 16 | - |
| Tiger Water Supply | San Luis Obispo, CA | 1,600 | 5 | - |
| San Miguelito MWC | Avila Beach, CA | 1,600 | 5 | - |
| Callayomi County Water District | Middletown, CA | 1,598 | 8 | - |
| Chris Flat Campground | Sparks, CA | 1,585 | 21 | - |
| Durham Irrigation District | Durham, CA | 1,581 | 11 | - |
| Devore WC | Devore, CA | 1,574 | 17 | - |
| Oid-Oakdale Rural Water System #1 | Oakdale, CA | 1,570 | 3 | - |
| Lopez Project | San Luis Obispo, CA | 1,569 | 5 | - |
| Madera Co Sa1-Indian Lakes | Madera, CA | 1,562 | 22 | - |
| Nps Prns - Beaches | Point Reyes Station, CA | 1,560 | 76 | - |
| Pine Cove Water District | Idyllwild, CA | 1,540 | 22 | - |
| Fall River Valley Csd | Fall River Mills, CA | 1,535 | 21 | - |
| Plumas Eureka Csd | Blairsden, CA | 1,534 | 99 | - |
| Los Alamos Community Services District | Los Alamos, CA | 1,534 | 6 | - |
| Lake County CSA 2 - Spring Valley | Lakeport, CA | 1,531 | 23 | - |
| Buckingham Park Water District | Kelseyville, CA | 1,521 | 24 | - |
| County of Monterey-Lake Nacimiento | Bradley, CA | 1,521 | 10 | - |
| Hume Lake Christian Camps, Inc | Hume, CA | 1,519 | 7 | - |
| White Fence Farms MWC No. 1 | Palmdale, CA | 1,518 | 59 | - |