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 |
| SOUTH VALLEY FARMS-BEECH HULLER/OFFICE | WASCO, CA | 75 | 6 | — |
| KERNVALE MUTUAL WATER CO | LAKE ISABELLA, CA | 75 | 95 | — |
| INDIAN BEACH RESORT | SAN ANSELMO, CA | 75 | 12 | — |
| TIERRA BONITA MUTUAL WATER | LANCASTER, CA | 75 | 10 | — |
| REDS MEADOW RESORT | MAMMOTH LAKES, CA | 75 | 0 | — |
| MD 58 SIERRA HIGHLANDS | MADERA, CA | 75 | 18 | — |
| GREEN GULCH FARM | MUIR BEACH, CA | 75 | 6 | — |
| CSP - MT TAM EAST PEAK SYSTEM | PETALUMA, CA | 75 | 0 | — |
| NPS PRNS - SKY CAMP CAMPGROUND | POINT REYES, CA | 75 | 0 | — |
| MANCHESTER UNION ELEMENTARY SCHOOL | MANCHESTER, CA | 75 | 5 | — |
| EEL RIVER CHARTER SCHOOL | COVELO, CA | 75 | 2 | — |
| YOKAYO TRIBE OF INDIANS | TALMAGE, CA | 75 | 32 | — |
| APOSTOLIC TABERNACLE | MERCED, CA | 75 | 4 | — |
| CRYSTAL CRAG WATER & DEVELOPMENT ASSOC. | POMONA, CA | 75 | 27 | — |
| WOODS LODGE | MAMMOTH LAKES, CA | 75 | 20 | — |
| MANZANITA HILLS WA | ROYAL OAKS, CA | 75 | 26 | — |
| APPLE AVE WS #02 | GREENFIELD, CA | 75 | 96 | — |
| HARBOR VIEW WA | SALINAS, CA | 75 | 60 | — |
| CATHIARD FAMILY ESTATE WINERY | ST. HELENA, CA | 75 | 0 | — |
| PINE RIDGE WINERY | NAPA, CA | 75 | 12 | — |
| RIDGE CAFE-WATER SYSTEM | NORTH SAN JUAN, CA | 75 | 4 | — |
| ANANDA RETREAT CENTER | NEVADA CITY, CA | 75 | 45 | — |
| BETHEL CHURCH | GRASS VALLEY, CA | 75 | 7 | — |
| GOLD HILL MOBILEHOME PARK | ROSEVILLE, CA | 75 | 30 | — |
| AUBURN RIDGE WOODS | SACRAMENTO, CA | 75 | 13 | — |
| USFS MIDDLE MEADOWS CAMPGROUND | GEORGETOWN, CA | 75 | 2 | — |
| PNF PENINSULA / WYANDOTTE CGS | QUINCY, CA | 75 | 4 | — |
| EDDO'S HARBOR & R V PARK | RIO VISTA, CA | 75 | 20 | — |
| HAPPY BAR | SACRAMENTO, CA | 75 | 10 | — |
| OAK GLEN STEAK HOUSE | YUCAIPA, CA | 75 | 11 | — |
| POTRERO GENERAL STORE | DULZURA, CA | 75 | 30 | — |
| SANTA MARGARITA COUNTY PRESERVE | SAN DIEGO, CA | 75 | 3 | — |
| A1 WINSTONS MOBILE HOME PARK | STOCKTON, CA | 75 | 16 | — |
| COUNTRY CLUB VISTA MUTUAL WATER CO | WOODBRIDGE, CA | 75 | 15 | — |
| COUNTRY MANOR MHP | VALLEY SPRINGS, CA | 75 | 12 | — |
| USASA-POM ENCLAVE - CAMP ROBERTS | SEASIDE, CA | 75 | 8 | — |
| TALLEY FARMS LABOR HOUSING | ARROYO GRANDE, CA | 75 | 2 | — |
| AVILA VALLEY MUTUAL WATER CO | SAN LUIS OBISPO, CA | 75 | 34 | — |
| CENTER OF EFFORT WINERY | ARROYO GRANDE, CA | 75 | 0 | — |
| SAN MARCOS CHRISTIAN CAMP | SANTA BARBARA, CA | 75 | 14 | — |
| VISTA HILLS MUTUAL WATER COMPANY | LOMPOC, CA | 75 | 25 | — |
| THE HILT ESTATE | LOMPOC, CA | 75 | 2 | — |
| USFS/LASSEN HAT CR WORK CENTER | SUSANVILLE, CA | 75 | 20 | — |
| SISKIYOU FOREST PRODUCTS | ANDERSON, CA | 75 | 0 | — |
| CLEAR CREEK MOBILE PARK | REDDING, CA | 75 | 15 | — |
| LAKESHORE RV PARK | ANTIOCH, CA | 75 | 18 | — |
| PG&E - NORTHSHORE CAMPGROUND | REDDING, CA | 75 | 3 | — |
| JOLLY GIANT FLEA MARKET | ANDERSON, CA | 75 | 4 | — |
| USFS - GREGORY CREEK CAMP | REDDING, CA | 75 | 2 | — |
| SHASTA MARINA AT PACKERS BAY | LAKEHEAD, CA | 75 | 2 | — |