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
City of Merced Merced, CA 93,692 11 Detected
City of Redwood City Redwood City, CA 92,819 8 Clean
Cal Am Water Company - Monterey Pacific Grove, CA 92,450 17 Detected
Anza Community Hall Anza, CA 92,019 18 -
City of Westminster Westminster, CA 90,911 13 Detected
Santa Monica-City, Water Division Los Angeles, CA 89,947 3 Detected
City of Redding Redding, CA 89,628 15 Detected
Placer Cwa - Foothill Auburn, CA 89,544 0 Clean
Olivenhain MWD Encinitas, CA 86,458 0 Clean
Chino, City Of Chino, CA 86,435 44 Clean
Western MWD Riverside, CA 86,062 0 Detected
Manteca, City Of Manteca, CA 84,928 77 Detected
Napa, City Of Napa, CA 84,804 23 Clean
Indio Water Authority Indio, CA 84,757 14 Clean
Goleta Water District Goleta, CA 84,462 22 Detected
Yorba Linda Water District Placentia, CA 84,292 4 Detected
City of Buena Park Buena Park, CA 81,998 12 Detected
City of Milpitas Milpitas, CA 81,773 15 Clean
City of Mountain View Mountain View, CA 81,501 17 Clean
Big Bear Administration San Bernardino, CA 81,075 12 -
Folsom, City of - Main Folsom, CA 80,969 8 Clean
Inglewood- City, Water Dept. Inglewood, CA 80,824 16 Detected
City of Alhambra Alhambra, CA 79,776 8 Clean
Upland, City Of Upland, CA 78,376 10 Detected
Redlands City MUD-Water Div Redlands, CA 78,025 11 Detected
City of Pleasanton Pleasanton, CA 76,689 4 Detected
South Gate-City, Water Dept. South Gate, CA 76,443 127 Detected
Chino Hills, City Of Chino Hills, CA 76,414 43 Clean
Snow Summit Big Bear Lake, CA 75,500 45 -
Compton-City, Water Dept. Compton, CA 74,877 20 Detected
Desert Water Agency Palm Springs, CA 74,807 22 Clean
Turlock, City Of Turlock, CA 72,682 20 Clean
Liberty Utilities - Bellflower-Norwalk Downey, CA 72,624 4 Detected
Las Virgenes MWD Calabasas, CA 72,602 9 Clean
Tulare, City Of Tulare, CA 72,131 18 Clean
California Water Service Co. - Palos Ver San Jose, CA 71,452 6 Clean
City of Yuba City Yuba City, CA 70,256 37 Clean
Cwsc los Altos Suburban San Jose, CA 69,973 7 Detected
Valley County Water Dist. Baldwin Park, CA 68,871 8 Clean
City of Newport Beach Newport Beach, CA 68,572 7 Clean
Lodi, City Of Lodi, CA 68,272 16 Detected
Citrus Heights Water District Citrus Heights, CA 67,818 8 Clean
City of Davis Davis, CA 67,457 62 Clean
City of Palo Alto Palo Alto, CA 67,231 18 Clean
Lynwood-City, Water Dept. Lynwood, CA 66,967 20 Detected
Beaumont Cherry Valley WD Beaumont, CA 66,841 8 Clean
Cal American Water Co Rosemead, CA 66,809 10 Clean
City of Tustin Tustin, CA 66,600 17 Detected
City of Madera Madera, CA 66,560 23 Clean
Lakewood - City, Water Dept. Lakewood, CA 66,135 6 Detected
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