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 |
| YONGS BAR & GRILL WATER SYSTEM | HOLT, CA | 30 | 8 | — |
| GAF MATERIALS CO | PARSIPPANY, CA | 30 | 45 | — |
| S M S BRINERS INC | SUNOL, CA | 30 | 13 | — |
| ZUCKERMAN, ROSCOE 39-316 | STOCKTON, CA | 30 | 11 | — |
| LARSEN RANCH 39-40/WATER SYSTEM | MANTECA, CA | 30 | 65 | — |
| P G & E-TURNER CUT WATER SYSTEM | OAKLAND, CA | 30 | 18 | — |
| RIVER ROAD PRODUCE WATER SYSTEM | ESCALON, CA | 30 | 0 | — |
| HIGUERA APARTMENTS | SAN LUIS OBISPO, CA | 30 | 35 | — |
| MUTUAL WATER ASSOCIATION | ARROYO GRANDE, CA | 30 | 7 | — |
| LONGBRANCH SALOON, THE | CRESTON, CA | 30 | 50 | — |
| HOLDGRAFER & ASSOCIATES | SAN LUIS OBISPO, CA | 30 | 21 | — |
| CERRO ALTO CAMPGROUND | SANTA MARIA, CA | 30 | 12 | — |
| MUSTANG SPRINGS MUTUAL WATER | PASO ROBLES, CA | 30 | 15 | — |
| CAELESTA WINERY | THOUSAND OAKS, CA | 30 | 0 | — |
| JONATA HOMEOWNERS ASSOCIATION | BUELLTON, CA | 30 | 4 | — |
| LIVE OAK CREEK MUTUAL WATER COMPANY | CA | 30 | 0 | — |
| SAN MARTIN LIONS CLUB | SAN MARTIN, CA | 30 | 6 | — |
| ROCKWOOD ESTATES MUTUAL WATER COMPANY | MORGAN HILL, CA | 30 | 2 | — |
| CASSIN RANCH (DRISCOLL'S) | WATSONVILLE, CA | 30 | 0 | — |
| BASSHOLE BREWS | LAKEHEAD, CA | 30 | 3 | — |
| THE SUMMIT | SANTA FE, CA | 30 | 11 | — |
| RAINBOW'S END MOBILE HOME PARK | BURNEY, CA | 30 | 3 | — |
| CAMP LEONARD, SIERRA NV F.C. | SAN FRANCISCO, CA | 30 | 1 | — |
| DILLON CREEK CAMPGROUND-SRNF | ORLEANS, CA | 30 | 0 | — |
| JUANITA LAKE CAMPGROUND | YREKA, CA | 30 | 1 | — |
| MT. HEBRON WORK CENTER | YREKA, CA | 30 | 3 | — |
| SAWYER S BAR WORK CENTER | YREKA, CA | 30 | 1 | — |
| KLAMATH BASIN NATIONAL WILDLIFE REFUGE | TULELAKE, CA | 30 | 4 | — |
| REDWOOD HEIGHTS MUTUAL WATER COMPANY | CAZADERO, CA | 30 | 66 | — |
| SENECA FAMILY OF AGENCIES | OAKLAND, CA | 30 | 14 | — |
| SCHUG CELLARS | SONOMA, CA | 30 | 8 | — |
| LIETO WATER SYSTEM (REACH CHARTR SCHOOL) | SEBASTOPOL, CA | 30 | 12 | — |
| PLUMFIELD ACADEMY SCHOOL (OCCIDENTAL RD) | SEBASTOPOL, CA | 30 | 0 | — |
| THE RENTAL PLACE | SONOMA, CA | 30 | 86 | — |
| MATRIX WINERY | HEALDSBURG, CA | 30 | 4 | — |
| BUCHER WATER COMPANY | HEALDSBURG, CA | 30 | 5 | — |
| WINE COUNTRY IND PARK-BLDGS A&B | SONOMA, CA | 30 | 9 | — |
| MOSHIN VINEYARDS | HEALDSBURG, CA | 30 | 2 | — |
| HAWKES WINERY | HEALDSBURG, CA | 30 | 0 | — |
| WILSON WINERY | HEALDSBURG, CA | 30 | 2 | — |
| BUCKLEY FAMILY PARTNERSHIP | SONOMA, CA | 30 | 1 | — |
| AZURE ACRES CD RECOVERY CENTER | SEBASTOPOL, CA | 30 | 4 | — |
| FAT PILGRIM GENERAL STORE | SONOMA, CA | 30 | 0 | — |
| ZIALENA WINERY | HEALDSBURG, CA | 30 | 2 | — |
| MACDONALD BUNKHOUSE | HEALDSBURG, CA | 30 | 1 | — |
| RAINBOW FARMS | TURLOCK, CA | 30 | 17 | — |
| TDS CALIFORNIA | TURLOCK, CA | 30 | 10 | — |
| CALIFORNIA NUT COMPANY | DENAIR, CA | 30 | 4 | — |
| JENNINGS WWTP | MODESTO, CA | 30 | 4 | — |
| RANCHO TEHAMA ASSOCIATION | CORNING, CA | 30 | 3 | — |