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 |
| STOCO MUTUAL WATER COMPANY | BAKERSFIELD, CA | 85 | 62 | — |
| KERN RIDGE GROWERS | ARVIN, CA | 85 | 43 | — |
| MID - BAGBY RECREATION AREA | SNELLING, CA | 85 | 8 | — |
| DRISCOLL STRAWBERRY WS | WATSONVILLE, CA | 85 | 43 | — |
| SOUTH YUBA CAMPGROUND | EL DORADO HILLS, CA | 85 | 4 | — |
| TRUCKEE-DONNER PUD - HIRSCHDALE | TRUCKEE, CA | 85 | 2 | — |
| LIBERTY PARK WATER ASSOCIATION | HUNTINGTON BEACH, CA | 85 | 19 | — |
| WHITE'S STEEL, INC. | THERMAL, CA | 85 | 110 | — |
| IDYLLWILD PINES CAMP | IDYLLWILD, CA | 85 | 7 | — |
| COZAD WATER SYSTEM | STOCKTON, CA | 85 | 6 | — |
| BASSI RANCH MUTUAL WATER CO. | GROVER BEACH, CA | 85 | 11 | — |
| ZOO MED-WINTERHAVEN | SAN LUIS OBISPO, CA | 85 | 2 | — |
| RESOURCE CENTER | GOLETA, CA | 85 | 2 | — |
| LONE TREE MOBILE HOME PARK | ANDERSON, CA | 85 | 10 | — |
| CREEKSIDE MOBILEHOME PARK | SACRAMENTO, CA | 85 | 2 | — |
| MODERN VILLAGE MWC | RED BLUFF, CA | 85 | 22 | — |
| LASSEN VIEW WATER DISTRICT | RED BLUFF, CA | 85 | 20 | — |
| YOSEMITE VISTA ESTATES | GROVELAND, CA | 85 | 5 | — |
| MJUSD DOBBINS SCHOOL | MARYSVILLE, CA | 85 | 12 | — |
| MT RALSTON PROPERTIES ASSC INC | SAN RAMON, CA | 84 | 32 | — |
| PONDEROSA RV PARK | FRESNO, CA | 84 | 17 | — |
| EAGLE NEST HOMEOWNERS' ASSOCIATION | SUSANVILLE, CA | 84 | 18 | — |
| MD 36 EASTIN ARCOLA | MADERA, CA | 84 | 30 | — |
| ORR SPRINGS RESORT | UKIAH, CA | 84 | 15 | — |
| SIERRA EAST HOA | COLEVILLE, CA | 84 | 90 | — |
| LAKE SAN ANTONIO MHP WS | SAN JOSE, CA | 84 | 5 | — |
| DAVIS ESTATES | HUNTINGTON BEACH, CA | 84 | 0 | — |
| GOLDEN HILLS MUTUAL WATER CO | LOOMIS, CA | 84 | 33 | — |
| FALLON ROAD LABOR HOUSING | KING CITY, CA | 84 | 33 | — |
| CHAMISAL MWC | ADELANTO, CA | 84 | 38 | — |
| WYNOLA FARMS WATER DISTRICT | JULIAN, CA | 84 | 9 | — |
| KEN MAR GARDENS | ARROYO GRANDE, CA | 84 | 45 | — |
| SARALEE'S VINEYARD AND TASTING ROOM | SANTA ROSA, CA | 84 | 0 | — |
| PANORAMA PARK FIRE PRO CO | POSEY, CA | 84 | 18 | — |
| TRIASSIC LEGACY VINEYARDS WATER SYSTEM | TEHACHAPI, CA | 83 | 2 | — |
| SUNRISE SHORE MUTUAL WATER COMPANY | LOWER LAKE, CA | 83 | 39 | — |
| RIPPERDAN COMMUNITY DAY SCHOOL | MADERA, CA | 83 | 17 | — |
| CAL AM - COARSEGOLD | SACRAMENTO, CA | 83 | 17 | — |
| CDF - OAK GLEN CONSERVATION CAMP | YUCAIPA, CA | 83 | 7 | — |
| SJ COUNTY-REDWOOD SCHOOL | STOCKTON, CA | 83 | 8 | — |
| ALAMEDA COUNTY FAIRGROUNDS | PLEASANTON, CA | 82 | 20 | — |
| EBRPD ROUND VALLEY WATER SYSTEM | OAKLAND, CA | 82 | 0 | — |
| NEW HORIZONS MOBILE/RV PARK | REDMOND, CA | 82 | 40 | — |
| CC FARMS, LLC. | LIVERMORE, CA | 82 | 71 | — |
| LAKE OF THE WOODS MOBILE VILLAGE | LAKE OF THE WOODS, CA | 82 | 40 | — |
| DESERT BREEZE MOBILE HOME ESTATES | ENCINO, CA | 82 | 66 | — |
| CHOWCHILLA REC AREA EASTMAN LAKE | RAYMOND, CA | 82 | 4 | — |
| TOMALES TIN BUILDING | TOMALES, CA | 82 | 6 | — |
| JACKS RANCH-RESERVATION ROAD WS | SALINAS, CA | 82 | 2 | — |
| FLORICULTURA PACIFIC WS | SALINAS, CA | 82 | 6 | — |