PlainWater

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.

Population Violations Health Violations Name
System Name Location Population Violations PFAS
33rd District Agricultural Association Tres Pinos, CA 9,000 24 -
Clear Creek Csd-Anderson Anderson, CA 8,900 7 Clean
Guadalupe Water Department Guadalupe, CA 8,897 17 Clean
Cal Am - West Placer Sacramento, CA 8,861 0 Clean
Awa Buckhorn Plant Sutter Creek, CA 8,791 13 Clean
City of Waterford Waterford, CA 8,788 7 Clean
Needles, City Of Needles, CA 8,766 17 Clean
Tract 349 Mutual Water Co. Cudahy, CA 8,700 14 Detected
Naval Base Ventura County, Port Hueneme Point Mugu, CA 8,625 14 -
Gonzales, City Of Gonzales, CA 8,327 24 Clean
Orosi Public Utility District Orosi, CA 8,300 19 Clean
City of Orland Orland, CA 8,298 17 Clean
City of Corning Corning, CA 8,244 31 Clean
La Puente Valley Cwd La Puente, CA 8,243 1 Clean
Mammoth Cwd Mammoth Lakes, CA 8,234 13 Clean
Imperial Valley College Imperial, CA 8,150 33 Clean
Gswc - Hollydale Anaheim, CA 8,099 2 Detected
Firebaugh City Firebaugh, CA 8,096 25 Clean
Pismo Beach Water Department Pismo Beach, CA 8,036 13 Clean
Templeton Csd Templeton, CA 8,011 4 Detected
Gray Lodge Check Station Gridley, CA 8,000 2 -
California-American Larkfield (Puc) Sacramento, CA 7,913 6 Clean
Kirkwood Meadows Public Utility District Kirkwood, CA 7,851 3 Clean
Woodlake, City Of Woodlake, CA 7,846 41 Clean
Florin County Water District Sacramento, CA 7,831 45 Detected
Yreka, City Of Yreka, CA 7,825 5 Clean
City of Susanville Susanville, CA 7,811 11 Clean
Delhi Cwd Delhi, CA 7,784 34 Detected
Valencia Heights Water Co. West Covina, CA 7,775 12 Detected
Highlands Mutual Water Company Clearlake, CA 7,772 23 Clean
Mammoth Mountain Ski Area - Outpost 14 Mammoth Lakes, CA 7,736 31 Clean
Western Heights Water Company Yucaipa, CA 7,705 6 Clean
Earlimart PUD Earlimart, CA 7,679 35 Clean
Oceano Comm Services Dist. Oceano, CA 7,601 23 Clean
Sebastopol, City Of Sebastopol, CA 7,522 19 Clean
Castroville Community Services District Castroville, CA 7,515 13 Clean
Folsom State Prison Represa, CA 7,502 4 Detected
Caltrans-Willows Reststop-Nb Willows, CA 7,500 12 -
Caltrans-Willows Reststop-Sb Willows, CA 7,500 13 -
Hughson, City Of Hughson, CA 7,481 87 Clean
City of Dos Palos Dos Palos, CA 7,452 57 Clean
City of Fowler Fowler, CA 7,448 21 Detected
Escalon, City Of Escalon, CA 7,429 35 Clean
Trumbull Lake Campground Sparks, CA 7,423 28 -
Gswc - Calipatria San Dimas, CA 7,363 6 Clean
San Gabriel Valley Water Co-Montebello 2 El Monte, CA 7,330 9 Clean
Vandenberg Village Comm. Serv. Dist. Lompoc, CA 7,308 2 Clean
Cotati, City Of Cotati, CA 7,303 3 Clean
City of Gridley Gridley, CA 7,269 11 Detected
Cal-Water Service Co.-Willows San Jose, CA 7,240 3 Clean
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