California
California drinking water quality
Every public water system in California we've verified. Each report covers one calendar year and shows the utility's own measured contaminant levels against federal limits.
- Alameda (2024)29 contaminants measured· 2 at or above the limit
- Albany (2024)29 contaminants measured· 2 at or above the limit
- Antioch (2024)15 contaminants measured· 2 at or above the limit20242024
- Bakersfield (2024)40 contaminants measured
- Berkeley (2024)29 contaminants measured· 2 at or above the limit
- City of Brentwood (2024)15 contaminants measured· 2 at or above the limit20242024
- Burbank (2024)46 contaminants measured· 20 at or above the limit
- Castro Valley (2024)29 contaminants measured· 2 at or above the limit
- Chico (2024)41 contaminants measured
- Chula Vista Otay (2024)18 contaminants measured· 1 at or above the limit
- Chula Vista Sweetwater (2024)37 contaminants measured· 7 at or above the limit
- Clovis (2024)15 contaminants measured
- Concord (2024)15 contaminants measured· 2 at or above the limit
- Costa Mesa (2024)37 contaminants measured· 2 at or above the limit
- Crockett (2024)29 contaminants measured· 2 at or above the limit
- City of Cupertino (2024)20 contaminants measured
- Daly City (2024)31 contaminants measured
- Diablo Water District (2024)15 contaminants measured· 2 at or above the limit20242024
- East Valley Service Area (2024)31 contaminants measured· 5 at or above the limit
- El Cajon (2024)45 contaminants measured· 3 at or above the limit
- El Cerrito (2024)29 contaminants measured· 2 at or above the limit
- El Monte (2024)25 contaminants measured· 3 at or above the limit
- El Sobrante (2024)29 contaminants measured· 2 at or above the limit
- Emeryville (2024)29 contaminants measured· 2 at or above the limit
- Escondido (2024)31 contaminants measured· 1 at or above the limit
- Fairfield (2024)22 contaminants measured
- Fontana (2024)35 contaminants measured· 4 at or above the limit
- Fullerton (2024)45 contaminants measured· 4 at or above the limit
- Glendale (2024)38 contaminants measured· 5 at or above the limit
- Golden State Water Company (2024)15 contaminants measured· 2 at or above the limit20242024
- Hayward (2024)29 contaminants measured· 2 at or above the limit20242024
- City of Hemet (2024)31 contaminants measured· 5 at or above the limit
- Hercules (2024)29 contaminants measured· 2 at or above the limit
- Hesperia (2024)35 contaminants measured
- Huntington Beach (2025)37 contaminants measured· 3 at or above the limit
- Inglewood (2023)38 contaminants measured· 4 at or above the limit
- Irvine (2023)45 contaminants measured· 3 at or above the limit
- Kensington (2024)29 contaminants measured· 2 at or above the limit
- Lafayette (2024)29 contaminants measured· 2 at or above the limit
- Los Angeles LADWP (2023)33 contaminants measured
- City of Martinez (2024)15 contaminants measured· 2 at or above the limit20242024
- City of Menifee (2024)31 contaminants measured· 5 at or above the limit
- Mills Service Area (2024)31 contaminants measured· 5 at or above the limit
- Moraga (2024)29 contaminants measured· 2 at or above the limit
- Moreno Valley (2024)31 contaminants measured· 5 at or above the limit
- City of Murrieta (2024)31 contaminants measured· 5 at or above the limit
- Oakland (2024)29 contaminants measured· 2 at or above the limit
- Ontario (2024)40 contaminants measured· 7 at or above the limit
- Orinda (2024)29 contaminants measured· 2 at or above the limit
- Oxnard (2024)33 contaminants measured· 4 at or above the limit
- Pasadena (2023)65 contaminants measured· 2 at or above the limit
- City of Perris (2024)31 contaminants measured· 5 at or above the limit
- Piedmont (2024)29 contaminants measured· 2 at or above the limit
- Pinole (2024)29 contaminants measured· 2 at or above the limit
- City of Pittsburg (2024)15 contaminants measured· 2 at or above the limit20242024
- Pomona (2024)68 contaminants measured· 27 at or above the limit
- Rancho Cucamonga (2024)16 contaminants measured
- Rialto (2024)34 contaminants measured· 2 at or above the limit
- Richmond (2024)29 contaminants measured· 2 at or above the limit
- Riverside (2024)18 contaminants measured· 1 at or above the limit
- Rodeo (2024)29 contaminants measured· 2 at or above the limit
- Salinas (2024)37 contaminants measured
- San Diego (2023)33 contaminants measured· 4 at or above the limit
- San Francisco SFPUC (2023)31 contaminants measured· 1 at or above the limit
- City of San Jacinto (2024)31 contaminants measured· 5 at or above the limit
- San Jose (2024)20 contaminants measured
- San Leandro (2024)29 contaminants measured· 2 at or above the limit
- San Lorenzo (2024)29 contaminants measured· 2 at or above the limit
- San Mateo (2024)30 contaminants measured
- San Pablo (2024)29 contaminants measured· 2 at or above the limit
- Santa Ana (2024)51 contaminants measured· 2 at or above the limit
- Santa Clara (2024)18 contaminants measured
- Santa Clarita (2024)30 contaminants measured· 2 at or above the limit
- Santa Rosa (2024)30 contaminants measured· 4 at or above the limit
- Simi Valley (2024)36 contaminants measured
- Skinner Service Area (2024)31 contaminants measured· 5 at or above the limit
- Stockton (2024)32 contaminants measured
- Sunnyvale (2024)26 contaminants measured
- City of Temecula (2024)31 contaminants measured· 5 at or above the limit
- Thousand Oaks (2024)31 contaminants measured
- Torrance (2024)24 contaminants measured· 6 at or above the limit
- Tracy (2024)52 contaminants measured
- Vacaville (2024)33 contaminants measured· 1 at or above the limit
- Vallejo (2024)22 contaminants measured· 2 at or above the limit
- Ventura (2023)37 contaminants measured· 4 at or above the limit
- Victorville (2024)27 contaminants measured
- Visalia (2024)41 contaminants measured
- West Covina (2024)37 contaminants measured· 4 at or above the limit