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 |
|---|---|---|---|---|
| DEL ORO WC - COUNTRY ESTATES DIST | CHICO, CA | 297 | 26 | — |
| HIDDEN VIEW HENSLEY LAKE | RAYMOND, CA | 297 | 1 | — |
| RANCHO CALIMESA MOBILE HOME PARK | CALIMESA, CA | 296 | 36 | — |
| DON PEDRO REC AG:BLUE OAKS | LA GRANGE, CA | 296 | 2 | — |
| MANZANITA ELEMENTARY SCHOOL | GRIDLEY, CA | 295 | 10 | — |
| STANFORD SIERRA CAMP | SOUTH LAKE TAHOE, CA | 295 | 3 | — |
| SKYLINE PARK | SANTA YNEZ, CA | 295 | 21 | — |
| ELEANOR ROOSEVELT COMM LEARNING CTR | VISALIA, CA | 295 | 22 | — |
| CWS - LAKELAND | SAN JOSE, CA | 294 | 9 | — |
| CANYON RV PARK | TUSTIN, CA | 294 | 10 | — |
| FCWWD 42/ALLUVIAL & FANCHER | FRESNO, CA | 291 | 15 | — |
| RANCHERITOS #2 | APPLE VALLEY, CA | 291 | 1 | — |
| GRAN MUTUAL WATER CO | CHICO, CA | 290 | 7 | — |
| MESQUITE MINES INC. | BRAWLEY, CA | 290 | 36 | — |
| EASTERN SIERRA COLLEGE CENTER - BISHOP | BISHOP, CA | 290 | 129 | — |
| AUTOCAMP-YOSEMITE | MIDPINES, CA | 290 | 8 | — |
| SCHELBY SCHOOL | MERCED, CA | 290 | 4 | — |
| AUBURN VALLEY COMMUNITY SERVICE DIS | AUBURN, CA | 290 | 11 | — |
| MOSS MOBILE MANOR | LUCERNE VALLEY, CA | 290 | 9 | — |
| RANCHO DEL CAMPO WATER SYSTEM | SPRING VALLEY, CA | 290 | 27 | — |
| MORADA ESTATES PWS | STOCKTON, CA | 290 | 9 | — |
| SID - ELMIRA | VACAVILLE, CA | 290 | 1 | — |
| GILL CREEK MUTUAL WATER COMPANY | GEYSERVILLE, CA | 290 | 8 | — |
| SONOMA COUNTY CSA 41-FREESTONE | SANTA ROSA, CA | 290 | 63 | — |
| MUSICK MEADOWS 2 | SHAVER LAKE, CA | 289 | 22 | — |
| ROUND VALLEY ELEMENTARY SCHOOL | COVELO, CA | 289 | 8 | — |
| GRENADA SANITARY DISTRICT | GRENADA, CA | 289 | 20 | — |
| GRAVENSTEIN SCHOOL DISTRICT-HILLCREST | SEBASTOPOL, CA | 289 | 16 | — |
| SIERRA OUTDOOR SCHOOL | SONORA, CA | 289 | 30 | — |
| ANGELS CAMP RV/CAMPING RESORT | ANGELS CAMP, CA | 288 | 101 | — |
| OAKHURST CHRISTIAN CONF CENTER | COARSEGOLD, CA | 288 | 38 | — |
| CARMET BY THE SEA WATER COMPANY | BODEGA BAY, CA | 288 | 14 | — |
| BELMONT TERRACE MUTUAL WATER COMPANY | SEBASTOPOL, CA | 287 | 8 | — |
| OID #51 - SUNSET OAKS #10 | OAKDALE, CA | 287 | 7 | — |
| MCCLURE BOAT CLUB, INC. | SNELLING, CA | 286 | 10 | — |
| CDPR-MCCONNELL | COLUMBIA, CA | 286 | 14 | — |
| YOSEMITE WHOLESALE | MODESTO, CA | 285 | 9 | — |
| CWS-ONYX WATER SYSTEM | SAN JOSE, CA | 284 | 5 | — |
| MARIPOSA PINES MUTUAL | MARIPOSA, CA | 284 | 22 | — |
| CAMP NAVARRO | NAVARRO, CA | 284 | 6 | — |
| MERQUIN ELEMENTARY SCHOOL | HILMAR, CA | 284 | 5 | — |
| HARRIS RD WS #10 | SALINAS, CA | 284 | 24 | — |
| LICK OBSERVATORY-UCSC | MOUNT HAMILTON, CA | 284 | 6 | — |
| DEAN CREEK RESORT | REDWAY, CA | 283 | 8 | — |
| BLUEBELL VALLEY MWC | STANDARD, CA | 282 | 20 | — |
| TOWN OF SUNOL - SFPUC | BURLINGAME, CA | 281 | 1 | — |
| WOOD CAMP - WATER SYSTEM | GRASS VALLEY, CA | 281 | 7 | — |
| U.S. GYPSUM CO | EL CENTRO, CA | 280 | 22 | — |
| CAL FIRE-EEL RIVER CONSERVATION CAMP | REDWAY, CA | 280 | 33 | — |
| LAKE ISABELLA KOA CAMPGROUND | TEMPLETON, CA | 280 | 158 | — |