Public Water Systems
7,249 active water systems in CA.
| System Name | Location | Population | Violations | PFAS |
|---|---|---|---|---|
| RIVERSIDE HIGHLAND WATER COMPANY | GRAND TERRACE, CA | 20,188 | 6 | Detected |
| HUMBOLDT C.S.D. | CUTTEN, CA | 19,807 | 7 | Detected |
| ARVIN COMMUNITY SERVICES DIST | ARVIN, CA | 19,669 | 331 | Clean |
| CALIFORNIA WATER SERVICE CO - WESTLAKE | SAN JOSE, CA | 19,533 | 0 | Detected |
| SOLEDAD, CITY OF | SOLEDAD, CA | 19,455 | 22 | Detected |
| PHELPS VINEYARDS | ST. HELENA, CA | 19,412 | 14 | — |
| SANTA FE SPRINGS - CITY, WATER DEPT. | SANTA FE SPRINGS, CA | 19,219 | 11 | Detected |
| QUARTZ HILL WATER DIST. | QUARTZ HILL, CA | 19,100 | 4 | Detected |
| LAMONT PUBLIC UTILITY DIST | LAMONT, CA | 19,057 | 128 | Detected |
| GREENFIELD, CITY OF | GREENFIELD, CA | 18,967 | 13 | Detected |
| SAN JACINTO, CITY OF | SAN JACINTO, CA | 18,950 | 11 | Clean |
| COASTSIDE COUNTY WATER DISTRICT | HALF MOON BAY, CA | 18,940 | 33 | Clean |
| SOUTH BAY ROD & GUN CLUB INC. | SAN DIEGO, CA | 18,900 | 55 | — |
| TWENTYNINE PALMS WATER DISTRICT | TWENTYNINE PALMS, CA | 18,795 | 254 | Detected |
| BELLA VISTA WATER DISTRICT | REDDING, CA | 18,612 | 9 | Detected |
| NPS GGNRA | SAUSALITO, CA | 18,447 | 22 | Clean |
| LAGUNA BEACH COUNTY WD | LAGUNA BEACH, CA | 18,404 | 2 | Detected |
| CALIFORNIA WATER SERVICE CO.-TRAVIS AFB | SAN JOSE, CA | 18,111 | 20 | Detected |
| BUTTE-GLENN COMMUNITY COLLEGE DIST | OROVILLE, CA | 18,000 | 4 | Clean |
| YUBA COUNTY MOTORPLEX | YUBA CITY, CA | 18,000 | 0 | — |
| CITY OF ARROYO GRANDE UTILITIES DIVISION | ARROYO GRANDE, CA | 17,963 | 7 | Detected |
| ROSAMOND CSD | ROSAMOND, CA | 17,711 | 23 | Detected |
| WESTERN MWD - MURRIETA DIVISION | RIVERSIDE, CA | 17,453 | 14 | Detected |
| BAKMAN WATER COMPANY | FRESNO, CA | 17,393 | 14 | Clean |
| COALINGA-CITY | COALINGA, CA | 17,277 | 77 | Clean |
| CITY OF CRESCENT CITY | CRESCENT CITY, CA | 17,262 | 3 | Clean |
| KERMAN, CITY OF | KERMAN, CA | 17,256 | 26 | Clean |
| NEVADA ID - E. GEORGE, BANNER MOUNTAIN | GRASS VALLEY, CA | 17,154 | 0 | Clean |
| MCKINLEYVILLE C.S.D. | MCKINLEYVILLE, CA | 16,900 | 8 | Clean |
| ORANGE VALE WATER COMPANY | ORANGEVALE, CA | 16,861 | 6 | Clean |
| BISHOP CREEK CHEVRON | BISHOP, CA | 16,793 | 0 | — |
| TOWN OF DISCOVERY BAY | DISCOVERY BAY, CA | 16,790 | 6 | Detected |
| PINEDALE COUNTY WATER DISTRICT | PINEDALE, CA | 16,736 | 33 | Detected |
| UKIAH, CITY OF | UKIAH, CA | 16,607 | 4 | Detected |
| OLIVEHURST PUBLIC U.D. | OLIVEHURST, CA | 16,595 | 28 | Clean |
| EL SEGUNDO-CITY, WATER DEPT. | EL SEGUNDO, CA | 16,445 | 4 | Detected |
| FILLMORE WATER DEPT | FILLMORE, CA | 16,419 | 13 | Detected |
| CITY OF CUPERTINO | SAN JOSE, CA | 16,336 | 15 | Clean |
| CWSC KING CITY | SAN JOSE, CA | 16,334 | 4 | Detected |
| NASA AMES RESEARCH CENTER | MOFFETT FIELD, CA | 16,273 | 4 | Clean |
| WALNUT PARK MUTUAL WATER CO. | HUNTINGTON PARK, CA | 16,180 | 12 | Clean |
| LINCOLN AVENUE WATER CO. | ALTADENA, CA | 16,088 | 3 | — |
| CARPINTERIA VALLEY WATER DISTRICT | CARPINTERIA, CA | 15,996 | 10 | Detected |
| CITY OF LA PALMA | LA PALMA, CA | 15,948 | 8 | Detected |
| RIPON, CITY OF | RIPON, CA | 15,741 | 30 | Detected |
| US ARMY FORT IRWIN | FORT IRWIN, CA | 15,701 | 146 | Detected |
| CAL AM - FRUITRIDGE VISTA | SACRAMENTO, CA | 15,652 | 8 | Clean |
| RIO LINDA/ELVERTA COMMUNITY WATER DIST | RIO LINDA, CA | 15,460 | 19 | Detected |
| NORTHSTAR C.S.D. | TRUCKEE, CA | 15,452 | 6 | Clean |
| HUNTINGTON PARK-CITY, WATER DEPT. | HUNTINGTON PARK, CA | 15,437 | 3 | Detected |