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 |
| MOUNT MADONNA CENTER | WATSONVILLE, CA | 170 | 18 | — |
| HAT CREEK RESORT & RV PARK, LLC | SANTA MONICA, CA | 170 | 58 | — |
| JUNIPER VILLAGE FARM LABOR HOUSING | MACDOEL, CA | 170 | 2 | — |
| NEIL'S SERVICE CENTER | VACAVILLE, CA | 170 | 3 | — |
| SCONZA CANDY COMPANY | OAKDALE, CA | 170 | 8 | — |
| MOUNTAIN VIEW ELEMENTARY SCHOOL | DENAIR, CA | 170 | 40 | — |
| LEONI MEADOWS CAMP | GRIZZLY FLATS, CA | 169 | 19 | — |
| LOS ANGELES WORLD AIRPORTS | LOS ANGELES, CA | 169 | 5 | — |
| MOOSE CAMP | REDDING, CA | 169 | 33 | — |
| PLAZA MOBILE HOME PARK | SANTA CRUZ, CA | 169 | 10 | — |
| COLUSA LANDING | COLUSA, CA | 168 | 4 | — |
| MCGEE CREEK CAMPGROUND | BISHOP, CA | 168 | 14 | — |
| HYNES ESTATES MUTUAL WATER CO. | ANAHEIM, CA | 168 | 21 | — |
| MELODY WOODS WATER COMPANY | LOS GATOS, CA | 168 | 49 | — |
| LAKE SHASTA PINES RV PARK & CAMPGROUND | DUNSMUIR, CA | 168 | 36 | — |
| WESTMINSTER WOODS CAMP | OCCIDENTAL, CA | 168 | 21 | — |
| KNIGHTS FERRY COMM. SVC. DIST. | KNIGHTS FERRY, CA | 168 | 41 | — |
| USFS EUREKA VALLEY CAMPGD | PINECREST, CA | 168 | 0 | — |
| BISHOP COUNTRY CLUB | BISHOP, CA | 167 | 18 | — |
| CWS - FREMONT VALLEY | SAN JOSE, CA | 167 | 17 | — |
| CRAIN WALNUT SHELLING, INC. | LOS MOLINOS, CA | 167 | 2 | — |
| STRUVE RD WS #02 | ELVERTA, CA | 166 | 55 | — |
| LODI USD-TURNER ACADEMY AT TOKAY COLONY | LODI, CA | 166 | 16 | — |
| RENAISSANCE HIGH SCHOOL | WATSONVILLE, CA | 166 | 21 | — |
| KOINONIA CONFERENCE GROUNDS | WATSONVILLE, CA | 166 | 47 | — |
| OKIZU FOUNDATION | NOVATO, CA | 165 | 0 | — |
| CUDDEBACK GRAMMAR SCHOOL | CARLOTTA, CA | 165 | 20 | — |
| SAN JOAQUIN ESTATES MUTUAL WATER COMPANY | BAKERSFIELD, CA | 165 | 106 | — |
| MATSUI NURSERY WS | SALINAS, CA | 165 | 33 | — |
| T & A ONIONS | SALINAS, CA | 165 | 0 | — |
| MT. EDEN MUTUAL WATER COMPANY | SARATOGA, CA | 165 | 25 | — |
| ANCHORPOINT CHRISTIAN SCHOOL | GILROY, CA | 165 | 40 | — |
| BUTTEVILLE UNION SCHOOL | EDGEWOOD, CA | 165 | 4 | — |
| WILLIAMS MUTUAL WATER COMPANY | PORTERVILLE, CA | 165 | 45 | — |
| SAPUTO DAIRY FOOD USA | TULARE, CA | 165 | 2 | — |
| YMCA CAMP SEQUOIA GAINES | VISALIA, CA | 164 | 21 | — |
| CARMEL BY THE RIVER RV PARK WS | CARMEL, CA | 164 | 38 | — |
| PSMCSD - VIERRA ESTATES WS | ROYAL OAKS, CA | 164 | 27 | — |
| SUPERIOR PACKING CO | DIXON, CA | 164 | 3 | — |
| VIEJO LTD | SAN FRANCISCO, CA | 163 | 14 | — |
| SURREY VILLAGE WATER CO. INC. | RED BLUFF, CA | 163 | 8 | — |
| HARTLAND CHRISTIAN CAMP | BADGER, CA | 163 | 8 | — |
| MADERA CO MD1-HIDDEN LAKE ESTATES | MADERA, CA | 162 | 111 | — |
| LAGUNA SECA WC | SALINAS, CA | 162 | 148 | — |
| WHISPERING WINDS CATHOLIC CONFERENCE CEN | JULIAN, CA | 162 | 24 | — |
| USFS - CAMP 9 | OVERLAND PARK, CA | 161 | 20 | — |
| MERRILL GARDENS IRIS CANYON WS | MONTEREY, CA | 161 | 2 | — |
| SCHRAMSBERG WINERY | CALISTOGA, CA | 161 | 17 | — |
| ROLLINS LAKE RESORT, LONG RAVINE | GRASS VALLEY, CA | 161 | 4 | — |
| CHUCKWALLA VALLEY RACEWAY WATER SYSTEM | DESERT CENTER, CA | 161 | 35 | — |