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 |
| THE MERCANTILE | KELSEYVILLE, CA | 28 | 0 | — |
| LANG RANCH SHOPPING CENTER | LA CRESCENTA, CA | 28 | 7 | — |
| ROLLIN WAGON TRAILER CLUB | OAKHURST, CA | 28 | 19 | — |
| NORTH WAWONA PARK MUTUAL (A SYSTEM) | OAKHURST, CA | 28 | 4 | — |
| OLIVARES FARMS WATER SYSTEM | DELHI, CA | 28 | 42 | — |
| ROSEHART INDUSTRIAL PARK WS | SALINAS, CA | 28 | 19 | — |
| SOMERSTON WINERY | ST. HELENA, CA | 28 | 4 | — |
| R RANCH AT THE LAKE | NAPA, CA | 28 | 29 | — |
| PESTONI FAMILY ESTATE WINERY | ST. HELENA, CA | 28 | 7 | — |
| EVERGREEN MOTEL & MHP | CLAYTON, CA | 28 | 12 | — |
| LAGUNA VILLAGE RV PARK | ELK GROVE, CA | 28 | 18 | — |
| BAYER RESEARCH AND DEVELOPMENT LLC | WOODLAND, CA | 28 | 26 | — |
| CAMP LA VERNE | LA VERNE, CA | 28 | 26 | — |
| RICHARDSON BEARDSLEY PARK INC. | JULIAN, CA | 28 | 26 | — |
| HAVEN OF PEACE | FRENCH CAMP, CA | 28 | 20 | — |
| IDLE WILD MARKET | WOODBRIDGE, CA | 28 | 2 | — |
| PUENTE HOUSING SOLUTIONS | PESCADERO, CA | 28 | 1 | — |
| SANTA CRUZ MOUNTAIN PURE WC | LOS GATOS, CA | 28 | 35 | — |
| CSP-NATURE CENTER | FELTON, CA | 28 | 16 | — |
| VCA FORESTVILLE ANIMAL HOSPITAL | SEBASTOPOL, CA | 28 | 0 | — |
| PADMASAMBHAVA PEACE INSTITUTE | CAZADERO, CA | 28 | 6 | — |
| SONOMA PACIFIC PALLET COMPANY | SONOMA, CA | 28 | 0 | — |
| WM. B. IDE ADOBE | OROVILLE, CA | 28 | 10 | — |
| MONROVIA NURSERY - OFFICE | WOODLAKE, CA | 28 | 25 | — |
| KENNEDY MEADOWS GENERAL STORE | INYOKERN, CA | 28 | 10 | — |
| MONROVIA NURSERY - VENICE HILLS | WOODLAKE, CA | 28 | 11 | — |
| CHEVRON LINDSAY | LINDSAY, CA | 28 | 0 | — |
| PINECREST ELEMENTARY SCHOOL | PINECREST, CA | 28 | 10 | — |
| MINER'S LEAP WINERY | SACRAMENTO, CA | 28 | 2 | — |
| GIBSON'S ROADHOUSE CAFE | PIONEER, CA | 27 | 11 | — |
| SLO 2 20 WINERY | PLYMOUTH, CA | 27 | 0 | — |
| BELLA GRACE VINEYARDS | PLYMOUTH, CA | 27 | 4 | — |
| DORABELLE MUTUAL WATER COMPANY | SHAVER LAKE, CA | 27 | 22 | — |
| DRIFTWOOD MOBILEHOME PARK | RAMONA, CA | 27 | 28 | — |
| BELMONT TEMPERANCE PROPERTY WATER SYSTEM | FRESNO, CA | 27 | 65 | — |
| BLM SAN JOAQUIN RIVER GORGE | BAKERSFIELD, CA | 27 | 23 | — |
| GRANVILLE FARMS, LLC | FRESNO, CA | 27 | 0 | — |
| SEGURA'S RV PARK LLC | NEWCASTLE, CA | 27 | 26 | — |
| CALENERGY (ENG. & TECH.) | CALIPATRIA, CA | 27 | 4 | — |
| NPS - DEATH VALLEY, GRAPEVINE RS | DEATH VALLEY, CA | 27 | 6 | — |
| SCHWEIKART WATER SYSTEM | BAKERSFIELD, CA | 27 | 17 | — |
| JASMINE VINEYARDS COLD STORAGE | DELANO, CA | 27 | 1 | — |
| DAYS END RV PARK | SUSANVILLE, CA | 27 | 3 | — |
| MENDOCINO INN AND FARM - A | LITTLE RIVER, CA | 27 | 8 | — |
| MENDOCINO INN AND FARM - B | LITTLE RIVER, CA | 27 | 4 | — |
| MENDOCINO GROVE | MENDOCINO, CA | 27 | 2 | — |
| KANDOLA FARMS PRODUCE, INC. | LIVINGSTON, CA | 27 | 12 | — |
| HOT CREEK RANCH | MAMMOTH LAKES, CA | 27 | 25 | — |
| LATIN MARKET 2 | MAMMOTH LAKES, CA | 27 | 33 | — |
| OASIS CAFE WS | SOLEDAD, CA | 27 | 30 | — |