California Water Quality Reports
Comprehensive water quality data for 1118 cities across California. View EPA-verified contaminant levels and get filter recommendations.
1118
Cities
26
Safe
833
Monitor
45
At Risk
20
Limited testing
194
No Test Data
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 904 cities serving 35,171,969 people across 53 counties.
Common Contaminants in California
619 cities in California have at least one contaminant above EPA health guidelines.
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Upload my testCities in California
Los Angeles
People Served3869K
259 results on file
Above Guidelines3
View Report โ
Alameda
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Alamo
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Albany
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Ashland
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Bayview
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Berkeley
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Blackhawk
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Castro Valley
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Cherryland
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Crockett
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Danville
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Diablo
People Served1430K
145 results on file
Above Guidelines0
View Report โ
El Cerrito
People Served1430K
145 results on file
Above Guidelines0
View Report โ
El Sobrante
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Emeryville
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Fairview
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Hercules
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Kensington
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Lafayette
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Moraga
People Served1430K
145 results on file
Above Guidelines0
View Report โ
North Richmond
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Oakland
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Orinda
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Piedmont
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Pinole
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Richmond
People Served1430K
145 results on file
Above Guidelines0
View Report โ
Rodeo
People Served1430K
145 results on file
Above Guidelines0
View Report โ
San Leandro
People Served1430K
145 results on file
Above Guidelines0
View Report โ
San Lorenzo
People Served1430K
145 results on file
Above Guidelines0
View Report โ
San Pablo
People Served1430K
145 results on file
Above Guidelines0
View Report โ
San Ramon
People Served1430K
145 results on file
Above Guidelines0
View Report โ
San Diego
People Served1375K
244 results on file
Above Guidelines2
View Report โ
Fresno
People Served1095K
151 results on file
Above Guidelines3
View Report โ
Alum Rock
People Served1008K
194 results on file
Above Guidelines2
View Report โ
Cambrian Park
People Served1008K
194 results on file
Above Guidelines2
View Report โ
Campbell
People Served1008K
194 results on file
Above Guidelines2
View Report โ
East Foothills
People Served1008K
194 results on file
Above Guidelines2
View Report โ
Fruitdale
People Served1008K
194 results on file
Above Guidelines2
View Report โ
Los Gatos
People Served1008K
194 results on file
Above Guidelines2
View Report โ
Monte Sereno
People Served1008K
194 results on file
Above Guidelines2
View Report โ
San Jose
People Served1008K
194 results on file
Above Guidelines2
View Report โ
Saratoga
People Served1008K
194 results on file
Above Guidelines2
View Report โ
San Francisco
People Served884K
105 results on file
Above Guidelines0
View Report โ
Beaumont
People Served624K
230 results on file
Above Guidelines2
View Report โ
Canyon Lake
People Served624K
230 results on file
Above Guidelines2
View Report โ
East Hemet
People Served624K
230 results on file
Above Guidelines2
View Report โ
French Valley
People Served624K
230 results on file
Above Guidelines2
View Report โ
Good Hope
People Served624K
230 results on file
Above Guidelines2
View Report โ
Green Acres
People Served624K
230 results on file
Above Guidelines2
View Report โ
Homeland
People Served624K
230 results on file
Above Guidelines2
View Report โ
Lakeview
People Served624K
230 results on file
Above Guidelines2
View Report โ
March ARB
People Served624K
230 results on file
Above Guidelines2
View Report โ
Mead Valley
People Served624K
230 results on file
Above Guidelines2
View Report โ
Menifee
People Served624K
230 results on file
Above Guidelines2
View Report โ
Moreno Valley
People Served624K
230 results on file
Above Guidelines2
View Report โ
Murrieta
People Served624K
230 results on file
Above Guidelines2
View Report โ
Perris
People Served624K
230 results on file
Above Guidelines2
View Report โ
Romoland
People Served624K
230 results on file
Above Guidelines2
View Report โ
Sage
People Served624K
230 results on file
Above Guidelines2
View Report โ
Temecula
People Served624K
230 results on file
Above Guidelines2
View Report โ
Valle Vista
People Served624K
230 results on file
Above Guidelines2
View Report โ
Winchester
People Served624K
230 results on file
Above Guidelines2
View Report โ
Sacramento
People Served521K
205 results on file
Above Guidelines4
View Report โ
Long Beach
People Served461K
37 results on file
Above Guidelines2
View Report โ
Costa Mesa
People Served453K
229 results on file
Above Guidelines2
View Report โ
Irvine
People Served453K
229 results on file
Above Guidelines2
View Report โ
Laguna Beach
People Served453K
229 results on file
Above Guidelines2
View Report โ
Laguna Woods
People Served453K
229 results on file
Above Guidelines2
View Report โ
Lake Forest
People Served453K
229 results on file
Above Guidelines2
View Report โ
Modjeska
People Served453K
229 results on file
Above Guidelines2
View Report โ
Silverado
People Served453K
229 results on file
Above Guidelines2
View Report โ
Fremont
People Served345K
198 results on file
Above Guidelines1
View Report โ
Newark
People Served345K
198 results on file
Above Guidelines1
View Report โ
Union City
People Served345K
198 results on file
Above Guidelines1
View Report โ
Anaheim
People Served341K
152 results on file
Above Guidelines6
View Report โ
Santa Ana
People Served338K
36 results on file
Above Guidelines3
View Report โ
Riverside
People Served312K
213 results on file
Above Guidelines1
View Report โ
Bostonia
People Served277K
161 results on file
Above Guidelines3
View Report โ
Casa de Oro-Mount Helix
People Served277K
161 results on file
Above Guidelines3
View Report โ
El Cajon
People Served277K
161 results on file
Above Guidelines3
View Report โ
Granite Hills
People Served277K
161 results on file
Above Guidelines3
View Report โ
La Mesa
People Served277K
161 results on file
Above Guidelines3
View Report โ
La Presa
People Served277K
161 results on file
Above Guidelines3
View Report โ
Lemon Grove
People Served277K
161 results on file
Above Guidelines3
View Report โ
Rancho San Diego
People Served277K
161 results on file
Above Guidelines3
View Report โ
Winter Gardens
People Served277K
161 results on file
Above Guidelines3
View Report โ
Alondra Park
People Served275K
42 results on file
Above Guidelines2
View Report โ
Carson
People Served275K
42 results on file
Above Guidelines2
View Report โ
Del Aire
People Served275K
42 results on file
Above Guidelines2
View Report โ
Gardena
People Served275K
42 results on file
Above Guidelines2
View Report โ
Lawndale
People Served275K
42 results on file
Above Guidelines2
View Report โ
Lennox
People Served275K
42 results on file
Above Guidelines2
View Report โ
West Athens
People Served275K
42 results on file
Above Guidelines2
View Report โ
West Rancho Dominguez
People Served275K
42 results on file
Above Guidelines2
View Report โ
Westmont
People Served275K
42 results on file
Above Guidelines2
View Report โ
Bermuda Dunes
People Served270K
144 results on file
Above Guidelines2
View Report โ
Cathedral City
People Served270K
144 results on file
Above Guidelines2
View Report โ
Desert Palms
People Served270K
144 results on file
Above Guidelines2
View Report โ
Indian Wells
People Served270K
144 results on file
Above Guidelines2
View Report โ
Showing top 100 of 1,118 cities by population.
Use the search box above to find any city in California.
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