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 |
|---|---|---|---|---|
| Colonial Park | Healdsburg, CA | 342 | 14 | - |
| Del Oro Water Co.-Magalia | Chico, CA | 340 | 8 | - |
| Johns Manville | Willows, CA | 340 | 10 | - |
| Sharondale Mesa HOA | Calimesa, CA | 340 | 47 | - |
| Arbor Mobile Home Park WS | Irvine, CA | 340 | 26 | - |
| Verde Vale Elementary School | Anderson, CA | 340 | 6 | - |
| Tooleville Mutual Non Profit Water Assn | Exeter, CA | 340 | 79 | - |
| Ponderosa Csd | Springville, CA | 340 | 41 | - |
| Leisure Pines Mutual Water Co | Twain Harte, CA | 340 | 10 | - |
| Sisar Mutual Water Co | Santa Paula, CA | 340 | 8 | - |
| South Coast Inn | Goleta, CA | 339 | 2 | - |
| Porterville-Jones Corner | Porterville, CA | 339 | 2 | Clean |
| Washington School | Winton, CA | 338 | 9 | - |
| YMCA Camp Marston/Raintree | Julian, CA | 338 | 30 | - |
| Aldercroft Heights County Water District | Los Gatos, CA | 338 | 57 | - |
| Trinity Knolls Mutual Water Company | Trinity Center, CA | 338 | 18 | - |
| Muir Beach Community | Muir Beach, CA | 336 | 10 | - |
| Delta Mutual Water Company | Oakley, CA | 333 | 24 | - |
| Riverside Csd | Ferndale, CA | 333 | 20 | - |
| Folsom Lake Mutual Water Co | Granite Bay, CA | 333 | 0 | - |
| Needles KOA | Needles, CA | 333 | 2 | - |
| Shasta CSA - Castella, #3 | Redding, CA | 333 | 36 | - |
| Penn Valley Shopping Center | Penn Valley, CA | 332 | 27 | - |
| Trinity Village Mutual Water | Salyer, CA | 332 | 11 | - |
| Thunderhill Raceway | Willows, CA | 331 | 0 | - |
| Jehovah's Witnesses Church - Reedley | Reedley, CA | 330 | 4 | - |
| Myers Flat M.w.s. Inc. | Myers Flat, CA | 330 | 33 | - |
| Dhs Calexico | Imperial, CA | 330 | 34 | - |
| Washington Water District | Washington, CA | 330 | 58 | - |
| Del Dios Mutual Water Company | Escondido, CA | 330 | 28 | - |
| Phillips Farms | Lodi, CA | 330 | 56 | - |
| East Nicolaus Joint Union High School | Nicolaus, CA | 330 | 12 | - |
| R-Ranch in the Sequoias | Kernville, CA | 330 | 57 | - |
| Pinnacles National Park-West District | Paicines, CA | 328 | 6 | - |
| Dodge Ridge Ski Resort | Pinecrest, CA | 328 | 7 | - |
| Pleasant Grove MHP | Oroville, CA | 327 | 45 | - |
| French Camp Golf Course | French Camp, CA | 327 | 37 | - |
| Fawn & Stoney Campground | Redding, CA | 327 | 0 | - |
| Kings River RV Resort, LLC | Kingsburg, CA | 327 | 25 | - |
| Joseph Grant County Park | San Jose, CA | 326 | 11 | - |
| Bidwell Park Golf Course | Chico, CA | 325 | 15 | - |
| Leisure Lake Mobile Estates | Chandler, CA | 325 | 24 | - |
| Charleston School | Los Banos, CA | 325 | 8 | - |
| Twin Lakes Enterprises | Bridgeport, CA | 325 | 39 | - |
| Saddlebag Lake Campground | Bishop, CA | 325 | 24 | - |
| Desert Springs MWC | Lucerne Valley, CA | 325 | 6 | - |
| Sunshine Resort | Parker Dam, CA | 325 | 25 | - |
| Bel Air Mobile Estate | Stockton, CA | 325 | 14 | - |
| El Capitan Mutual Water Company | Goleta, CA | 325 | 20 | - |
| Woodstock Ranch | Santa Ynez, CA | 325 | 2 | - |