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 |
| OAK KNOLL VILLAGE | PALA, CA | 66 | 24 | — |
| ROLLING HILLS MUTUAL WATER COMPANY | ORCUTT, CA | 66 | 28 | — |
| SPRING VALLEY HEIGHTS ASSOCIATION INC | MILPITAS, CA | 66 | 7 | — |
| GOLDEN HEIGHTS MUTUAL WATER COMPANY | GILROY, CA | 66 | 4 | — |
| NAPLES | CARPINTERIA, CA | 66 | 4 | — |
| FOXEN VINEYARD INC. | SANTA MARIA, CA | 66 | 2 | — |
| SIX ACRES WATER COMPANY | SAN FRANCISCO, CA | 66 | 103 | — |
| ROBIN WAY WATER SYSTEM | FAIRFIELD, CA | 66 | 37 | — |
| KING FRESH PACKING & COOLING | DINUBA, CA | 66 | 10 | — |
| KIRKWOOD CAMPGROUND | HOLLISTER, CA | 65 | 10 | — |
| WAHL FAMILY WATER SYSTEM | BRENTWOOD, CA | 65 | 18 | — |
| BUTTE COURT MOBILE HOME PARK | MATHER, CA | 65 | 25 | — |
| LATROBE ELEMENTARY SCHOOL | SHINGLE SPRINGS, CA | 65 | 28 | — |
| DOCMANOV VINEYARDS | PLACERVILLE, CA | 65 | 0 | — |
| LOTUS PUB | LOTUS, CA | 65 | 31 | — |
| AMERICAN LEGION TRACT RESORT ASSOC | FOLSOM, CA | 65 | 3 | — |
| AZALEA GLEN | TRINIDAD, CA | 65 | 25 | — |
| RANCH ROAD ESTATES MUTUAL WATER COMPANY | BISHOP, CA | 65 | 5 | — |
| INYO COUNTY PWD - LAWS TOWN | INDEPENDENCE, CA | 65 | 9 | — |
| ROSE VILLA APARTMENTS | RANCHO PALOS VERDES, CA | 65 | 56 | — |
| DELTA TRADING WATER SYSTEM | BAKERSFIELD, CA | 65 | 12 | — |
| DELANO GROWERS GRAPE PRODUCTS | DELANO, CA | 65 | 4 | — |
| BLUE LAKES VILLAGE | SANTA ROSA, CA | 65 | 36 | — |
| NARROWS FAMILY RESORT | UPPER LAKE, CA | 65 | 0 | — |
| LOS ANGELES, CITY OF - CASTAIC PWR PLANT | LOS ANGELES, CA | 65 | 0 | — |
| FENNER CANYON YOUTH CONSERVATION CAMP | VALYERMO, CA | 65 | 7 | — |
| LDS CHURCH MARIPOSA | TULARE, CA | 65 | 6 | — |
| YOSEMITE'S SCENIC WONDERS | SANTA MONICA, CA | 65 | 0 | — |
| HARRIS WOOLF ALMONDS-BALLICO | BALLICO, CA | 65 | 3 | — |
| TIOGA LAKE CAMPGROUND | BISHOP, CA | 65 | 22 | — |
| COLD WATER CANYON MWC | BISHOP, CA | 65 | 0 | — |
| HIDDEN VIEWS MHP WS | KING CITY, CA | 65 | 79 | — |
| MURPHY HILL WS #01 | WATSONVILLE, CA | 65 | 94 | — |
| GARLEN COURT WS | SALINAS, CA | 65 | 39 | — |
| RIVER RD WS #25 | GONZALES, CA | 65 | 216 | — |
| VIERRA MEADOWS MWC | SALINAS, CA | 65 | 42 | — |
| CAPURRO & SON WS | MOSS LANDING, CA | 65 | 7 | — |
| CALISTOGA FARM WORKER CENTER | NAPA, CA | 65 | 2 | — |
| COSENTINO WINERY | NAPA, CA | 65 | 6 | — |
| CAL FIRE SONOMA-LAKE-NAPA UNIT HQ | ST. HELENA, CA | 65 | 2 | — |
| DRIPPING SPRINGS CG- USFS | SAN DIEGO, CA | 65 | 21 | — |
| WESTERNER MOBILE HOME PARK | ELK GROVE, CA | 65 | 46 | — |
| TRAP THE (SWS) | SACRAMENTO, CA | 65 | 4 | — |
| ENZA ZADEN RESEARCH | SAN JUAN BAUTISTA, CA | 65 | 10 | — |
| BROOKSIDE MHP | MENTONE, CA | 65 | 63 | — |
| CDF - PILOT ROCK CONSERVATION CAMP | CRESTLINE, CA | 65 | 10 | — |
| USN SERE CAMP WARNER SPRINGS | SAN DIEGO, CA | 65 | 7 | — |
| BETHANY TEMPLE WATER SYSTEM | STOCKTON, CA | 65 | 20 | — |
| MONTE SERENO MUTUAL BENEFIT WATER | SAN LUIS OBISPO, CA | 65 | 0 | — |
| LOMA MAR MUTUAL | LOMA MAR, CA | 65 | 67 | — |