Public Water Systems
7,249 active water systems in CA.
| System Name | Location | Population | Violations | PFAS |
|---|---|---|---|---|
| GSWC-SOUTH SAN GABRIEL | SAN DIMAS, CA | 26,240 | 1 | Detected |
| BIG BEAR LAKE DWP - BIG BEAR SYSTEM | BIG BEAR LAKE, CA | 26,132 | 3 | Detected |
| REEDLEY, CITY OF | REEDLEY, CA | 26,076 | 26 | Clean |
| HOLLISTER, CITY OF | HOLLISTER, CA | 26,017 | 35 | Detected |
| WINDSOR, TOWN OF | WINDSOR, CA | 25,561 | 6 | Clean |
| CITY OF SOUTH PASADENA | SOUTH PASADENA, CA | 25,329 | 10 | Clean |
| SUNNY SLOPE WATER CO. | PASADENA, CA | 25,252 | 1 | Clean |
| LOMA LINDA, CITY OF | LOMA LINDA, CA | 25,129 | 9 | Clean |
| DHS BORDER PATROL HWY 94 CHECKPOINT | SAN DIEGO, CA | 25,083 | 39 | — |
| NORCO, CITY OF | NORCO, CA | 25,068 | 144 | Detected |
| AUERBACH FARMS | RAMONA, CA | 25,068 | 0 | — |
| ANTELOPE VALLEY POPPY RESERVE STATE PARK | LANCASTER, CA | 25,007 | 0 | — |
| ORCHARD DALE WATER DISTRICT | WHITTIER, CA | 25,000 | 10 | Detected |
| SUNNYSLOPE COUNTY WATER DIST | HOLLISTER, CA | 24,954 | 11 | Detected |
| CITY OF MOUNTAIN HOUSE | MOUNTAIN HOUSE, CA | 24,948 | 3 | Clean |
| CITY OF SEAL BEACH | SEAL BEACH, CA | 24,937 | 4 | Detected |
| RIVERBANK, CITY OF | RIVERBANK, CA | 24,834 | 34 | Clean |
| CAL-AM WATER COMPANY - DUARTE | ROSEMEAD, CA | 24,773 | 0 | Detected |
| LIBERTY UTILITIES - LYNWOOD | DOWNEY, CA | 24,701 | 0 | Detected |
| CALICO GHOST TOWN | SAN BERNARDINO, CA | 24,623 | 131 | — |
| LA COCINA | AGUANGA, CA | 24,524 | 12 | — |
| PHELAN PINON HILLS CSD | PHELAN, CA | 24,285 | 3 | Clean |
| SAN FERNANDO-CITY, WATER DEPT. | SAN FERNANDO, CA | 23,946 | 2 | Clean |
| GOLDEN STATE WATER COMPANY - BAY POINT | RANCHO CORDOVA, CA | 23,731 | 7 | Clean |
| RAINBOW MUNICIPAL WD | FALLBROOK, CA | 23,536 | 14 | Detected |
| PATTERSON, CITY OF | PATTERSON, CA | 23,304 | 8 | Detected |
| OAKDALE, CITY OF | OAKDALE, CA | 23,235 | 19 | Clean |
| VALLEY OF THE MOON WATER DISTRICT | EL VERANO, CA | 23,107 | 9 | Detected |
| EL MONTE-CITY, WATER DEPT. | EL MONTE, CA | 22,968 | 21 | Detected |
| CORCORAN, CITY OF | CORCORAN, CA | 22,808 | 18 | Clean |
| CITY OF MILLBRAE | MILLBRAE, CA | 22,795 | 0 | Clean |
| CWS - NORTH GARDEN | SAN JOSE, CA | 22,762 | 0 | Detected |
| WASCO, CITY OF | WASCO, CA | 22,757 | 30 | Clean |
| SOUTH FEATHER W&P - MINERS RANCH | OROVILLE, CA | 22,664 | 0 | Clean |
| MENLO PARK MUNICIPAL WATER | MENLO PARK, CA | 22,362 | 3 | Clean |
| PICO WD | PICO RIVERA, CA | 22,051 | 50 | Detected |
| TEMESCAL VALLEY WATER DISTRICT | TEMESCAL VALLEY, CA | 21,971 | 16 | Clean |
| SHAFTER, CITY OF | SHAFTER, CA | 21,915 | 39 | Clean |
| LINDA COUNTY WATER DISTRICT | MARYSVILLE, CA | 21,654 | 25 | Clean |
| IMPERIAL, CITY OF | IMPERIAL, CA | 21,591 | 39 | Detected |
| SANTA FE I.D. | RANCHO SANTA FE, CA | 21,578 | 1 | Detected |
| AMERICAN CANYON, CITY OF | AMERICAN CANYON, CA | 21,437 | 33 | Clean |
| PORT HUENEME CITY WATER DEPT | PORT HUENEME, CA | 21,407 | 16 | Detected |
| SAN LORENZO VALLEY WATER DIST | BOULDER CREEK, CA | 21,145 | 20 | Detected |
| ARCATA, CITY OF | ARCATA, CA | 20,875 | 2 | Clean |
| CAL/AM WATER COMPANY - BALDWIN HILLS | ROSEMEAD, CA | 20,724 | 4 | Detected |
| WEST KERN WATER DISTRICT | TAFT, CA | 20,500 | 6 | Clean |
| NORWALK - CITY, WATER DEPT. | NORWALK, CA | 20,283 | 2 | Detected |
| DHS BOULEVARD BORDER PATROL | SAN DIEGO, CA | 20,270 | 3 | — |
| LOMITA-CITY, WATER DEPT. | LOMITA, CA | 20,256 | 4 | Detected |