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 |
| BIANCHI FLOWERS INC | PESCADERO, CA | 65 | 9 | — |
| BURCHELL ROAD WATER ASSOCIATION | GILROY, CA | 65 | 39 | — |
| UVAS PINES RV PARK | MORGAN HILL, CA | 65 | 0 | — |
| CAL FIRE-DEADWOOD CONSERVATION CAMP | FORT JONES, CA | 65 | 14 | — |
| DELTA CONSERVATION CAMP | SUISUN CITY, CA | 65 | 1 | — |
| LONE PINE MUTUAL WATER COMPANY | SEBASTOPOL, CA | 65 | 9 | — |
| EVERGREEN MOBILE ESTATES | STOCKTON, CA | 65 | 21 | — |
| SEBASTIANI VINEYARDS | KENWOOD, CA | 65 | 7 | — |
| KJ CARNEROS HILLS WINERY | SONOMA, CA | 65 | 16 | — |
| 4N MOBILEHOME PARK | OAKDALE, CA | 65 | 12 | — |
| LIBERTY BAPTIST CHURCH | MODESTO, CA | 65 | 43 | — |
| REDDING ODD FELLOWS CAMP | LEWISTON, CA | 65 | 13 | — |
| COMMUNITY MUTUAL WATER CO | CAMARILLO, CA | 65 | 6 | — |
| FULL BELLY FARM | GUINDA, CA | 65 | 2 | — |
| FOOTHILL LIONS CLUB | MARYSVILLE, CA | 65 | 4 | — |
| ELM COURT | FRESNO, CA | 64 | 144 | — |
| ST. PETERS CATHOLIC CEMETERY | FRESNO, CA | 64 | 4 | — |
| PALOMINO ESTATES WATER COMPANY | GARBERVILLE, CA | 64 | 36 | — |
| IV DESERT MUSEUM SOCIETY INC. | OCOTILLO, CA | 64 | 6 | — |
| WEGIS MUTUAL WATER COMPANY | BAKERSFIELD, CA | 64 | 39 | — |
| SILVER CREEK | LIVERMORE, CA | 64 | 36 | — |
| SNELLING MERCED FALLS SCHOOL | SNELLING, CA | 64 | 6 | — |
| JS WEST MILLING CO HILMAR RANCH | MODESTO, CA | 64 | 8 | — |
| COUNTRY CLUB COUNTY WD | TURLOCK, CA | 64 | 10 | — |
| LEAFWOOD COMMUNITY WA | SALINAS, CA | 64 | 35 | — |
| PIONEER PLACE MWS | AROMAS, CA | 64 | 59 | — |
| TITUS WINERY | ST HELENA, CA | 64 | 4 | — |
| CONN CREEK WINERY | NAPA, CA | 64 | 4 | — |
| SILVER CREEK SUMMER HOME TRACT | TRUCKEE, CA | 64 | 21 | — |
| LAUREL COMMUNITY LEAGUE | LOS GATOS, CA | 64 | 42 | — |
| LOCKHEED MARTIN SPACE SYSTEMS | SANTA CRUZ, CA | 64 | 15 | — |
| LAKE SHASTA LODGE | LAKEHEAD, CA | 64 | 0 | — |
| MELITA HEIGHTS MUTUAL WATER COMPANY | SANTA ROSA, CA | 64 | 28 | — |
| HARRIS MORAN SEED COMPANY | DAVIS, CA | 64 | 1 | — |
| MOUNT GILEAD BIBLE CONFERENCE | WINDSOR, CA | 64 | 9 | — |
| CHATEAU DIANA | HEALDSBURG, CA | 64 | 6 | — |
| GRACIANNA WINERY | HEALDSBURG, CA | 64 | 2 | — |
| LONE PINE MHP | OAKDALE, CA | 64 | 14 | — |
| FRAZIER NUT FARMS, INC. | WATERFORD, CA | 64 | 117 | — |
| PACIFIC WOODTECH | RED BLUFF, CA | 64 | 16 | — |
| INDIAN GRINDING ROCK-CALAVERAS DISTRICT | COLUMBIA, CA | 63 | 0 | — |
| RICHVALE ELEMENTARY SCHOOL | BIGGS, CA | 63 | 23 | — |
| HIGHWAY 20 TRAILER PARK | ARBUCKLE, CA | 63 | 10 | — |
| LAKE CHIQUITA MUTUAL WATER COMPANY | OAKLAND, CA | 63 | 42 | — |
| MOTHER LODE WATER SYSTEM | COLOMA, CA | 63 | 6 | — |
| SEAWOOD ESTATES MUTUAL WATER COMPANY | TRINIDAD, CA | 63 | 33 | — |
| J.G. BOSWELL COMPANY WATER SYSTEM | CORCORAN, CA | 63 | 59 | — |
| MERCED FRUIT BARN | MERCED, CA | 63 | 0 | — |
| LAZY W RANCH WATER SYSTEM | SAN JUAN CAPISTRANO, CA | 63 | 5 | — |
| MADISON CENTER WATER SYSTEM | SAN MARCOS, CA | 63 | 8 | — |