California Water Quality Reports
Comprehensive water quality data for 1120 cities across California. View EPA-verified contaminant levels and get filter recommendations.
1120
Cities
355
Safe
533
Monitor
232
At Risk
Water Quality by County
Explore aggregated water quality scores across California counties. Scores are calculated based on EPA data and weighted by population.
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Data from 1059 cities serving 258,334,150 people across 51 counties.
Common Contaminants in California
765 cities in California have at least one contaminant above EPA health guidelines.
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Upload my testCities in California
Burbank
People Served4982K
Contaminants Tested1001
Above Guidelines7
View Report β
West Carson
People Served4012K
Contaminants Tested474
Above Guidelines6
View Report β
Lomita
People Served3960K
Contaminants Tested327
Above Guidelines8
View Report β
Florence-Graham
People Served3932K
Contaminants Tested353
Above Guidelines4
View Report β
Ladera Heights
People Served3927K
Contaminants Tested367
Above Guidelines6
View Report β
Willowbrook
People Served3910K
Contaminants Tested314
Above Guidelines4
View Report β
Culver City
People Served3907K
Contaminants Tested275
Above Guidelines6
View Report β
San Fernando
People Served3893K
Contaminants Tested285
Above Guidelines4
View Report β
View Park-Windsor Hills
People Served3889K
Contaminants Tested353
Above Guidelines4
View Report β
Los Angeles
People Served3872K
Contaminants Tested513
Above Guidelines4
View Report β
Beverly Hills
People Served3869K
Contaminants Tested261
Above Guidelines4
View Report β
Marina del Rey
People Served3869K
Contaminants Tested261
Above Guidelines4
View Report β
West Hollywood
People Served3869K
Contaminants Tested261
Above Guidelines4
View Report β
Hayward
People Served2014K
Contaminants Tested625
Above Guidelines1
View Report β
El Sobrante
People Served1823K
Contaminants Tested402
Above Guidelines3
View Report β
San Diego
People Served1736K
Contaminants Tested1334
Above Guidelines14
View Report β
El Cerrito
People Served1668K
Contaminants Tested376
Above Guidelines3
View Report β
Pleasant Hill
People Served1657K
Contaminants Tested497
Above Guidelines2
View Report β
Contra Costa Centre
People Served1628K
Contaminants Tested309
Above Guidelines1
View Report β
Shell Ridge
People Served1628K
Contaminants Tested309
Above Guidelines1
View Report β
Walnut Creek
People Served1628K
Contaminants Tested309
Above Guidelines1
View Report β
Ashland
People Served1589K
Contaminants Tested161
Above Guidelines0
View Report β
Cherryland
People Served1589K
Contaminants Tested161
Above Guidelines0
View Report β
Fairview
People Served1589K
Contaminants Tested161
Above Guidelines0
View Report β
San Lorenzo
People Served1589K
Contaminants Tested161
Above Guidelines0
View Report β
San Ramon
People Served1524K
Contaminants Tested409
Above Guidelines0
View Report β
Coronado
People Served1517K
Contaminants Tested285
Above Guidelines6
View Report β
Bayview
People Served1477K
Contaminants Tested301
Above Guidelines1
View Report β
Santee
People Served1465K
Contaminants Tested260
Above Guidelines4
View Report β
Alameda
People Served1432K
Contaminants Tested149
Above Guidelines0
View Report β
Moraga
People Served1430K
Contaminants Tested150
Above Guidelines0
View Report β
Castro Valley
People Served1430K
Contaminants Tested314
Above Guidelines0
View Report β
Acalanes Ridge
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Alamo
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Albany
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Berkeley
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Blackhawk
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Camino Tassajara
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Castle Hill
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Crockett
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Danville
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Diablo
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
East Richmond Heights
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Emeryville
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Hercules
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Kensington
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Lafayette
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Montalvin Manor
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Norris Canyon
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
North Richmond
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Oakland
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Orinda
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Piedmont
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Pinole
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Reliez Valley
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Richmond
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Rodeo
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Rollingwood
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
San Leandro
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
San Miguel
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
San Pablo
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Saranap
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Tara Hills
People Served1430K
Contaminants Tested147
Above Guidelines0
View Report β
Fresno
People Served1175K
Contaminants Tested1403
Above Guidelines20
View Report β
Mayfair
People Served1095K
Contaminants Tested158
Above Guidelines0
View Report β
Cupertino
People Served1094K
Contaminants Tested718
Above Guidelines7
View Report β
San Jose
People Served1076K
Contaminants Tested831
Above Guidelines5
View Report β
Murrieta
People Served1025K
Contaminants Tested665
Above Guidelines12
View Report β
Riverside
People Served1017K
Contaminants Tested490
Above Guidelines5
View Report β
Los Gatos
People Served1008K
Contaminants Tested467
Above Guidelines4
View Report β
Alum Rock
People Served1008K
Contaminants Tested454
Above Guidelines3
View Report β
Cambrian Park
People Served1008K
Contaminants Tested454
Above Guidelines3
View Report β
Campbell
People Served1008K
Contaminants Tested454
Above Guidelines3
View Report β
East Foothills
People Served1008K
Contaminants Tested454
Above Guidelines3
View Report β
Fruitdale
People Served1008K
Contaminants Tested454
Above Guidelines3
View Report β
Lexington Hills
People Served1008K
Contaminants Tested454
Above Guidelines3
View Report β
Monte Sereno
People Served1008K
Contaminants Tested454
Above Guidelines3
View Report β
Saratoga
People Served1008K
Contaminants Tested454
Above Guidelines3
View Report β
Compton
People Served1002K
Contaminants Tested645
Above Guidelines10
View Report β
San Francisco
People Served892K
Contaminants Tested524
Above Guidelines2
View Report β
Temecula
People Served879K
Contaminants Tested530
Above Guidelines10
View Report β
Canyon Lake
People Served865K
Contaminants Tested473
Above Guidelines8
View Report β
Santa Ana
People Served790K
Contaminants Tested257
Above Guidelines3
View Report β
Sacramento
People Served718K
Contaminants Tested736
Above Guidelines3
View Report β
Hemet
People Served711K
Contaminants Tested442
Above Guidelines4
View Report β
Moreno Valley
People Served709K
Contaminants Tested290
Above Guidelines5
View Report β
March ARB
People Served705K
Contaminants Tested248
Above Guidelines4
View Report β
Mead Valley
People Served705K
Contaminants Tested248
Above Guidelines4
View Report β
San Jacinto
People Served698K
Contaminants Tested272
Above Guidelines3
View Report β
Spring Valley
People Served694K
Contaminants Tested571
Above Guidelines12
View Report β
La Presa
People Served693K
Contaminants Tested557
Above Guidelines10
View Report β
East Hemet
People Served677K
Contaminants Tested252
Above Guidelines2
View Report β
Valle Vista
People Served677K
Contaminants Tested252
Above Guidelines2
View Report β
Beaumont
People Served674K
Contaminants Tested263
Above Guidelines2
View Report β
Fontana
People Served648K
Contaminants Tested654
Above Guidelines1
View Report β
Perris
People Served637K
Contaminants Tested261
Above Guidelines5
View Report β
Lakeview
People Served631K
Contaminants Tested287
Above Guidelines4
View Report β
Nuevo
People Served631K
Contaminants Tested287
Above Guidelines4
View Report β
Newport Beach
People Served631K
Contaminants Tested344
Above Guidelines5
View Report β
French Valley
People Served624K
Contaminants Tested235
Above Guidelines2
View Report β
Showing top 100 of 1,120 cities by population.
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