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 |
|---|---|---|---|---|
| Del Oro WC - Country Estates Dist | Chico, CA | 297 | 26 | - |
| Hidden View Hensley Lake | Raymond, CA | 297 | 1 | - |
| Rancho Calimesa Mobile Home Park | Calimesa, CA | 296 | 36 | - |
| Don Pedro Rec Ag:blue Oaks | La Grange, CA | 296 | 2 | - |
| Manzanita Elementary School | Gridley, CA | 295 | 10 | - |
| Stanford Sierra Camp | South Lake Tahoe, CA | 295 | 3 | - |
| Skyline Park | Santa Ynez, CA | 295 | 21 | - |
| Eleanor Roosevelt Comm Learning Ctr | Visalia, CA | 295 | 22 | - |
| Cws - Lakeland | San Jose, CA | 294 | 9 | - |
| Canyon RV Park | Tustin, CA | 294 | 10 | - |
| Fcwwd 42/Alluvial & Fancher | Fresno, CA | 291 | 15 | - |
| Rancheritos #2 | Apple Valley, CA | 291 | 1 | - |
| Gran Mutual Water Co | Chico, CA | 290 | 7 | - |
| Mesquite Mines Inc. | Brawley, CA | 290 | 36 | - |
| Eastern Sierra College Center - Bishop | Bishop, CA | 290 | 129 | - |
| Autocamp-Yosemite | Midpines, CA | 290 | 8 | - |
| Schelby School | Merced, CA | 290 | 4 | - |
| Auburn Valley Community Service Dis | Auburn, CA | 290 | 11 | - |
| Moss Mobile Manor | Lucerne Valley, CA | 290 | 9 | - |
| Rancho del Campo Water System | Spring Valley, CA | 290 | 27 | - |
| Morada Estates PWS | Stockton, CA | 290 | 9 | - |
| Sid - Elmira | Vacaville, CA | 290 | 1 | - |
| Gill Creek Mutual Water Company | Geyserville, CA | 290 | 8 | - |
| Sonoma County CSA 41-Freestone | Santa Rosa, CA | 290 | 63 | - |
| Musick Meadows 2 | Shaver Lake, CA | 289 | 22 | - |
| Round Valley Elementary School | Covelo, CA | 289 | 8 | - |
| Grenada Sanitary District | Grenada, CA | 289 | 20 | - |
| Gravenstein School District-Hillcrest | Sebastopol, CA | 289 | 16 | - |
| Sierra Outdoor School | Sonora, CA | 289 | 30 | - |
| Angels Camp RV/Camping Resort | Angels Camp, CA | 288 | 101 | - |
| Oakhurst Christian Conf Center | Coarsegold, CA | 288 | 38 | - |
| Carmet by the Sea Water Company | Bodega Bay, CA | 288 | 14 | - |
| Belmont Terrace Mutual Water Company | Sebastopol, CA | 287 | 8 | - |
| Oid #51 - Sunset Oaks #10 | Oakdale, CA | 287 | 7 | - |
| McClure Boat Club, Inc. | Snelling, CA | 286 | 10 | - |
| Cdpr-McConnell | Columbia, CA | 286 | 14 | - |
| Yosemite Wholesale | Modesto, CA | 285 | 9 | - |
| Cws-Onyx Water System | San Jose, CA | 284 | 5 | - |
| Mariposa Pines Mutual | Mariposa, CA | 284 | 22 | - |
| Camp Navarro | Navarro, CA | 284 | 6 | - |
| Merquin Elementary School | Hilmar, CA | 284 | 5 | - |
| Harris RD WS #10 | Salinas, CA | 284 | 24 | - |
| Lick Observatory-Ucsc | Mount Hamilton, CA | 284 | 6 | - |
| Dean Creek Resort | Redway, CA | 283 | 8 | - |
| Bluebell Valley MWC | Standard, CA | 282 | 20 | - |
| Town of Sunol - Sfpuc | Burlingame, CA | 281 | 1 | - |
| Wood Camp - Water System | Grass Valley, CA | 281 | 7 | - |
| U.S. Gypsum Co | El Centro, CA | 280 | 22 | - |
| Cal Fire-Eel River Conservation Camp | Redway, CA | 280 | 33 | - |
| Lake Isabella KOA Campground | Templeton, CA | 280 | 158 | - |