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 |
|---|---|---|---|---|
| Sea Ranch Water Company,the (Puc) | Sea Ranch, CA | 1,160 | 11 | Detected |
| Csp- Kirkwood Entrance | Felton, CA | 1,154 | 0 | - |
| Sonora Water Resources, Inc | Claremont, CA | 1,154 | 5 | - |
| Laytonville County Water District | Laytonville, CA | 1,152 | 34 | - |
| Laton Community Services District | Laton, CA | 1,151 | 19 | Detected |
| Pine Grove Comm Serv Dist | Pine Grove, CA | 1,141 | 20 | - |
| Cal Am Water Company - Chualar | Pacific Grove, CA | 1,139 | 4 | - |
| Bob Wiley Detention Facility | Visalia, CA | 1,130 | 8 | - |
| Bellflower Home Garden Water Company | Bellflower, CA | 1,129 | 4 | - |
| Usmc Nebo (Barstow) | Barstow, CA | 1,126 | 6 | - |
| Temecula/Vail Lake KOA | Temecula, CA | 1,125 | 24 | - |
| Sonora Meadows Mutual Wtr Co | Sonora, CA | 1,123 | 11 | - |
| Big Basin Water Company | Irvine, CA | 1,120 | 102 | - |
| Mid - Mc Swain Rec Area | Snelling, CA | 1,119 | 12 | - |
| Crystal Springs Cg | Sparks, CA | 1,118 | 0 | - |
| Bdvwa - Goat Mountain ID | Yucca Valley, CA | 1,118 | 6 | - |
| Fcsa 34 - Millerton New Town | Fresno, CA | 1,117 | 54 | - |
| Wild Wings Golf Community | Woodland, CA | 1,115 | 14 | - |
| Cws Southlake System | San Jose, CA | 1,112 | 2 | - |
| Inyo County Pwd - Independence | Independence, CA | 1,108 | 21 | - |
| Bakman Water-Rolling Hills | Fresno, CA | 1,107 | 12 | Clean |
| Cal Am Water Company - Hidden Hills | Pacific Grove, CA | 1,106 | 0 | - |
| North Edwards WD | North Edwards, CA | 1,105 | 209 | - |
| Family Market Water System | Hayward, CA | 1,105 | 0 | - |
| Flying J Travel Plaza | Knoxville, CA | 1,100 | 54 | - |
| Happy Camp C.s.d. | Happy Camp, CA | 1,100 | 12 | - |
| Evergreen Union School District | Cottonwood, CA | 1,100 | 4 | - |
| City of Modesto - South Turlock | Modesto, CA | 1,099 | 1 | - |
| Glen Ivy Hot Springs | Corona, CA | 1,087 | 50 | - |
| San Joaquin County-Raymus Village | Stockton, CA | 1,086 | 12 | - |
| Slo CSA No. 16 - Shandon | San Luis Obispo, CA | 1,085 | 0 | - |
| Waterford-River Pointe | Waterford, CA | 1,079 | 0 | - |
| Hopland Public Utility District | Ukiah, CA | 1,076 | 27 | - |
| Trinidad, City Of | Trinidad, CA | 1,072 | 25 | - |
| Barton Flats Water System | Angelus Oaks, CA | 1,070 | 24 | - |
| Bodega Bay Public Utility District | Bodega Bay, CA | 1,069 | 7 | - |
| Forest Lakes MWC | Felton, CA | 1,067 | 38 | - |
| Cal Am Water Company - Toro | Pacific Grove, CA | 1,065 | 31 | - |
| National American Corp. LP-Lake Minden | Nicolaus, CA | 1,065 | 7 | - |
| Plymouth, City Of | Plymouth, CA | 1,060 | 51 | - |
| Taylor Farms Retail, Inc. | San Juan Bautista, CA | 1,055 | 36 | - |
| R-Wild Horse Ranch | Platina, CA | 1,055 | 5 | - |
| Del Norte Coast State Park | Eureka, CA | 1,051 | 4 | - |
| Monte Vista Christian School | Watsonville, CA | 1,051 | 19 | - |
| Sundale Mutual Water Company a, B | Lancaster, CA | 1,050 | 70 | - |
| McSwain Elementary School | Merced, CA | 1,046 | 11 | - |
| Los Rios Rancho Water System | Yucaipa, CA | 1,046 | 26 | - |
| Fallsvale Service Company | Forest Falls, CA | 1,046 | 22 | - |
| California-American Geyserville (Puc) | Sacramento, CA | 1,046 | 1 | Clean |
| Ccwd - West Point | San Andreas, CA | 1,043 | 21 | - |