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 |
| KEEFER CREEK ESTATES | CHICO, CA | 160 | 10 | — |
| LAKEVIEW IMPROVEMENT ASSOCIATION 1 | COALINGA, CA | 160 | 77 | — |
| COMUNIDAD NUEVO LAGO, INC | TURLOCK, CA | 160 | 24 | — |
| KINGS PARK APARTMENTS | SANGER, CA | 160 | 59 | — |
| JITTER BEAN COFFEE | LAKEPORT, CA | 160 | 4 | — |
| METTLER VALLEY MUTUAL | LANCASTER, CA | 160 | 73 | — |
| SLEEPY VALLEY WATER COMPANY | SANTA CLARITA, CA | 160 | 13 | — |
| DRAGONFLY GOLF COURSE/WATER | MADERA, CA | 160 | 12 | — |
| SURFWOOD MUTUAL WATER CORPORATION | MENDOCINO, CA | 160 | 128 | — |
| PATTERSONS PUB | MENDOCINO, CA | 160 | 0 | — |
| ESPERANZA RD WS | SOLEDAD, CA | 160 | 5 | — |
| CLEAR CREEK SCHOOL | GRASS VALLEY, CA | 160 | 16 | — |
| SAN JUSTO MUTUAL WATER COMPANY | HOLLISTER, CA | 160 | 74 | — |
| MITSUBISHI CEMENT PLANT CUSHENBURY | LUCERNE VALLEY, CA | 160 | 2 | — |
| SAN ANTONIO WINERY | ONTARIO, CA | 160 | 14 | — |
| CLOVER FLAT ELEMENTARY SCHOOL | PINE VALLEY, CA | 160 | 26 | — |
| DHS BORDER PATROL I-8 CHECKPOINT | SAN DIEGO, CA | 160 | 10 | — |
| USN CAMP MICHAEL MONSOOR | SAN DIEGO, CA | 160 | 0 | — |
| IL VINETO | HILLSBOROUGH, CA | 160 | 24 | — |
| PAINTED CAVE | SANTA BARBARA, CA | 160 | 30 | — |
| BRICK BARN ESTATE WINERY | BUELLTON, CA | 160 | 0 | — |
| BONNY DOON SCHOOL | SANTA CRUZ, CA | 160 | 12 | — |
| AUCTION MART SNACK BAR | ANDERSON, CA | 160 | 10 | — |
| RODNEY STRONG VINEYARDS | HEALDSBURG, CA | 160 | 73 | Detected |
| SAINT FRANCIS WINERY-WILD OAK VINEYARDS | SANTA ROSA, CA | 160 | 10 | — |
| GRACE COMMUNITY CHRISTIAN CHURCH | CERES, CA | 160 | 2 | — |
| BROWNS ELEMENTARY SCHOOL | RIO OSO, CA | 160 | 14 | — |
| CALIFORNIA DAIRIES INC TIPTON | TIPTON, CA | 160 | 2 | — |
| SIESTA MOBILE HOME PARK | OXNARD, CA | 160 | 71 | — |
| NAVALAIR MOBILE HOME PARK | OXNARD, CA | 160 | 22 | — |
| CLARKSBURG COMM CHURCH | CLARKSBURG, CA | 160 | 9 | — |
| FELLOWSHIP OF FRIENDS | OREGON HOUSE, CA | 160 | 5 | — |
| GOLDEN STATE WATER CO - SAN JUAN OAKS | RANCHO CORDOVA, CA | 159 | 0 | — |
| MOOSE LODGE 1967 | VACAVILLE, CA | 159 | 10 | — |
| MUSICK CREEK TRACT ASSOCIATION | CLOVIS, CA | 158 | 20 | — |
| WILSON CIRCLE MUTUAL WATER COMPANY | BISHOP, CA | 158 | 6 | — |
| AQUA J. MUTUAL WATER COMPANY | LANCASTER, CA | 158 | 14 | — |
| WOODSON BRIDGE MHP | SILVERDALE, CA | 158 | 17 | — |
| ZAMORA SHELL & MINI MART | ZAMORA, CA | 158 | 59 | — |
| MUSD - SIERRA FOOTHILL CHARTER SCHOOL | MARIPOSA, CA | 157 | 10 | — |
| WOODS, THE (MENDOCINO) | SANTA CRUZ, CA | 157 | 2 | — |
| THOMAS MOUNTAIN WATER COMPANY | MOUNTAIN CENTER, CA | 157 | 48 | — |
| CEDAR LAKE CAMP INC | REDLANDS, CA | 157 | 2 | — |
| GAS POINT MARKET | COTTONWOOD, CA | 157 | 2 | — |
| RUSSIAN RIVER VINEYARDS & RESTAURANT | FORESTVILLE, CA | 157 | 13 | — |
| ANDY'S PRODUCE MARKET, INC. | SEBASTOPOL, CA | 157 | 26 | — |
| DEL LOMA RV PARK & CG | BIG BAR, CA | 157 | 11 | — |
| SEQUOIA CREST MUTUAL WATER COMPANY | SPRINGVILLE, CA | 157 | 11 | — |
| BIG OAK MOBILE HOME PARK WATER | OAKLEY, CA | 156 | 13 | — |
| LOWER LINE CREEK IMPRVMNT ASSN | KERMAN, CA | 156 | 47 | — |