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 |
| RIO RANCH COMMUNITY SVCS DIST | RED BLUFF, CA | 44 | 4 | — |
| MOUNTAIN VIEW MHP | VISALIA, CA | 44 | 23 | — |
| USFS BLACK OAK CAMPGROUND | SONORA, CA | 44 | 0 | — |
| BONFIRE VILLAGE HOTEL | SACRAMENTO, CA | 44 | 76 | — |
| ECHO CHALET INC | ECHO LAKES, CA | 43 | 5 | — |
| GOLDEN STATE VINTNERS - FRESNO | FRESNO, CA | 43 | 17 | — |
| SCE BISHOP CREEK PLANT 5 | ROSEMEAD, CA | 43 | 0 | — |
| COLD SPRING GRANITE CO RAYMOND | RAYMOND, CA | 43 | 153 | — |
| GOLDENEYE WINERY | ST. HELENA, CA | 43 | 0 | — |
| TWOMEY CELLARS | HEALDSBURG, CA | 43 | 17 | — |
| WHITEHALL LANE WINERY | ST. HELENA, CA | 43 | 20 | — |
| SAN AUGUSTINE MUTUAL WATER COMPANY | GAVIOTA, CA | 43 | 10 | — |
| EMERALD VALLEY MUTUAL WATER COMPANY | GILROY, CA | 43 | 8 | — |
| LAKEVIEW APARTMENTS | WATSONVILLE, CA | 43 | 13 | — |
| DARLING INGREDIENTS TURLOCK | CROWS LANDING, CA | 43 | 3 | — |
| NORTH VALLEY SERVICES | RED BLUFF, CA | 43 | 0 | — |
| INDIAN CREEK TRAILER PARK | SANTA ROSA, CA | 43 | 31 | — |
| SIERRA VISTA ASSOCIATION | CLOVIS, CA | 43 | 66 | — |
| TEAPOT DOME WATER CO | PORTERVILLE, CA | 43 | 23 | — |
| SIERRA MUTUAL WATER COMPANY | PORTERVILLE, CA | 43 | 152 | — |
| SAN CAYETANO MUTUAL WATER CO | FILLMORE, CA | 43 | 12 | — |
| L'AZIENDA D'AGOSTINI | PLYMOUTH, CA | 42 | 24 | — |
| MT ARARAT MOBILE HOME PARK | OAK VIEW, CA | 42 | 7 | — |
| WEST TECH INDUSTRIAL PARK | KINGSBURG, CA | 42 | 10 | — |
| WHITETHORN ELEMENTARY SCHOOL | MIRANDA, CA | 42 | 51 | — |
| SIERRA NORTH COMMUNITY SERVICE DISTRICT | BISHOP, CA | 42 | 33 | — |
| KRANENBURG WATER SYSTEM | BAKERSFIELD, CA | 42 | 11 | — |
| USFS - FRENCH GULCH CAMPGROUND WS | OVERLAND PARK, CA | 42 | 10 | — |
| BLEICH FLATS MUTUAL | LANCASTER, CA | 42 | 14 | — |
| MILLARD CANYON IMPROVEMENT ASSOCIATION | CAPE ELIZABETH, CA | 42 | 29 | — |
| BASS LAKE ANNEX 3 | WISHON, CA | 42 | 70 | — |
| GURDWARA PARMESHAR DWAR | MADERA, CA | 42 | 0 | — |
| BRANSCOMB MOBILE HOME PARK | ROHNERT PARK, CA | 42 | 172 | — |
| POINT CABRILLO HIGHLANDS | OAKLAND, CA | 42 | 12 | — |
| HOPETON SCHOOL | MERCED, CA | 42 | 3 | — |
| PARADISE RD WS #05 | PRUNEDALE, CA | 42 | 28 | — |
| TRINCHERO WINERY | ST. HELENA, CA | 42 | 4 | — |
| EHLERS ESTATE | ST. HELENA, CA | 42 | 0 | — |
| CAYMUS VINEYARDS | FAIRFIELD, CA | 42 | 17 | — |
| MARIA LANE MUTUAL WATER COMPANY | SARATOGA, CA | 42 | 12 | — |
| MEADOWRIDGE MUTUAL WATER CO | FREEDOM, CA | 42 | 20 | — |
| EB STONE | SUISUN CITY, CA | 42 | 43 | — |
| VINEHILL VISTAS MUTUAL WATER COMPANY | SEBASTOPOL, CA | 42 | 13 | — |
| BALLETTO VINEYARDS | SEBASTOPOL, CA | 42 | 2 | — |
| CHILDKIND LAGUNA PRESCHOOL | SANTA ROSA, CA | 42 | 4 | — |
| SUGARLOAF WATER SYSTEM | SANTA ROSA, CA | 42 | 0 | — |
| CHEMURGIC AGRICULTURAL CHEMICALS, INC. | TURLOCK, CA | 42 | 13 | — |
| BUCKTAIL MUTUAL WATER COMPANY | LEWISTON, CA | 42 | 23 | — |
| SLATE MOUNTAIN HOA | TULARE, CA | 42 | 2 | — |
| DARDANELLES RESORT | TRACY, CA | 42 | 46 | — |