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EWG's Tap Water Database

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California

  • 2,942 Utilities

  • Serving: 43,763,000

  • Data available: 2010-2015

  • Contaminants Found: 178

 

EWG's drinking water quality report for California shows results of tests conducted by the water utilities in California and provided to EWG by the California State Water Resources Control Board.

LARGE UTILITIES
ALL UTILITIES WITH VIOLATIONS
LARGE UTILITIES WITH VIOLATIONS

Below are utilities in California serving over 10,000 people, listed alphabetically. Click the "more" button below to get the full list of utilities serving over 10,000 people.

Large utilities in California

UtilityLocationPeople
Served
Alameda County Water DistrictFremont, CA340,000
Alco Water ServiceSalinas, CA29,179
Apple Valley Ranchos Water CompanyApple Valley, CA62,602
Arroyo Grande,Water DepartmentArroyo Grande, CA17,064
Arvin Community Services DistrictArvin, CA19,000
Atascadero Mutual Water CompanyAtascadero, CA30,332
Azusa Light and WaterAzusa, CA110,000
Beaumont Cherry Valley WDBeaumont, CA44,000
Bella Vista Water DistrictRedding, CA18,426
Bellflower - Somerset MWCBellflower, CA46,000
Beverly Hills Water DepartmentBeverly Hills, CA44,290
Big Bear City CSDBig Bear City, CA12,411
Burbank Water DepartmentBurbank, CA105,543
Cal American Water CompanyNewbury Park, CA61,206
Cal-am Water Company - DuarteRosemead, CA21,589
Cal-water Service Company - ChicoChico, CA100,435
Cal-water Service Company - MarysvilleChico, CA12,017
Cal/am Water Company - Baldwin HillsRosemead, CA18,397
Cal/Am Water Company - San MarinoRosemead, CA40,804
Calif State Polytechnical Univ - PomonaPomona, CA24,880
California American Water Company - AntelopeSacramento, CA34,168
California American Water Company - CoronadoImperial Beach, CA96,000
California American Water Company - Lincoln OaksSacramento, CA46,606
California American Water Company - MontereyMonterey, CA96,754
California American Water Company - ParkwaySacramento, CA44,949
California American Water Company - SuburbanSacramento, CA111,768
California Institution For MenChino, CA10,667
California Mens ColonySan Luis Obispo, CA15,000
California State FairSacramento, CA90,000
California State University FresnoFresno, CA23,000
More

Utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 in California

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served
Violation
Points
Hillview Water Co-raymondOakhurst, CA294350
Sonoma County Mutual Water CompanyCazadero, CA40270
Son Shine PropertiesEdison, CA438235
Quiet Oaks Mobile Home ParkWarner Springs, CA120225
East Wilson Road Water CompanyBakersfield, CA35194
Wilson Road Water CommunityBakersfield, CA72191
Hillview Water Company-oakhurst/sierra LakesOakhurst, CA2,805190
Forest SpringsBoulder Creek, CA385186
Springfield Water CompanyWatsonville, CA200185
San Joaquin Estates Mutual Water CompanyBakersfield, CA165184
San Miguel Ws #01Royal Oaks, CA100181
Las Cumbres Mutual Water CompanyLos Gatos, CA337180
Rainbird Valley Mutual Water CompanyWeldon, CA188175
Ironwood CampNewberry Springs, CA1,000175
Apple Ave. Ws #03Greenfield, CA60171
Encinal Rd. Ws #01Salinas, CA41165
Valley Ford Water AssociationValley Ford, CA40151
R.s. Mutual Water CompanyWofford Heights, CA67148
El Camino Water Company Inc.Spreckels, CA90142
Rodriguez Labor CampDelano, CA110141
Lemon Cove Water CompanyLemon Cove, CA200140
Beverly Grand Mutual WaterArroyo Grande, CA108140
Csa 70 W-4 PioneertownVictorville, CA625140
Ramona Water CompanyAnza, CA250135
Soults Mutual Water CompanyTulare, CA120128
River Rd. Ws #25Gonzales, CA65125
Vista Del Toro WsSalinas, CA87121
Sierra Mutual Water CompanyPorterville, CA39116
Willowside Terrace Water AssociationAlpine, CA100111
Lakeview Ranchos Mutual Water CompanyWeldon, CA120105

Large utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 in California

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served
Violation
Points
Arvin Community Services DistrictArvin, CA19,00092
City of LemooreLemoore, CA24,94550
City of AvenalAvenal, CA16,23645
Lamont Public Utility DistrictBakersfield, CA18,29040
CoalingaCoalinga, CA19,36231
City of LindsayLindsay, CA13,44525
City of ImperialImperial, CA16,14515
La Verne WDLa Verne, CA32,23010
City of GaltGalt, CA22,9826
City of American CanyonAmerican Canyon, CA20,0825
Camp Pendleton (North)Camp Pendleton, CA15,6005
City of MendotaMendota, CA11,1045
California Mens ColonySan Luis Obispo, CA15,0005
East Valley Water DistrictHighland, CA87,0005
Camp Pendleton (South)Camp Pendleton, CA39,4005
Oildale MWCOildale, CA26,0005
Calif State Polytechnical Univ - PomonaPomona, CA24,8805
City of McFarlandMcfarland, CA12,3334
City of ChinoChino, CA18,9073
Beverly Hills Water DepartmentBeverly Hills, CA44,2902
Fillmore Water DepartmentFillmore, CA15,2222
City of El CentroEl Centro, CA42,5952
City of MartinezMartinez, CA35,3751
Lynwood Water DepartmentLynwood, CA71,2971
Santa Paula Water SystemSanta Paula, CA30,0481
City of DelanoDelano, CA49,8001
City of Santa AnaSanta Ana, CA329,8151
City of CorcoranCorcoran, CA24,8131
City of KermanKerman, CA14,0681
City of ShafterShafter, CA16,9281

Contaminants found in California above health guidelines

Found above health guidelinesFound
Contaminant# of UtilitiesPeople Served# of UtilitiesPeople Served

Total trihalomethanes (TTHMs)
1,10140,799,7781,16742,360,438

Chromium (hexavalent)
1,32138,520,4871,35539,785,134

Bromodichloromethane
89233,452,79690134,196,785

Dibromochloromethane
86132,947,73887934,403,916

Chloroform
75531,267,30182234,136,827

Bromoform
70629,111,63080233,195,743

Uranium
87328,086,03392530,159,336

Dichloroacetic acid
58726,726,02364530,402,900

Trichloroacetic acid
51325,143,95855827,083,977

Arsenic
72223,188,64172223,188,641

Bromate
9810,559,41610010,588,306

Radium-226
17210,548,87719511,842,355

Radium-228
2688,056,2722688,056,272

Chlorate
1017,775,50856039,972,896

Radon
974,664,349974,664,349

Tetrachloroethylene (perchloroethylene)
783,790,388928,932,028

1,2-Dibromo-3-chloropropane (DBCP)
853,410,147903,761,631

Nitrate
3083,285,5471,75432,405,560

1,2,3-Trichloropropane
692,887,958787,275,378

1,4-Dioxane
502,757,95520017,744,976

Chlorite
92,133,00292,133,002

Perfluorooctane sulfonate (PFOS)
201,998,273201,998,273

Trichloroethylene
351,841,987678,192,604

Perfluorooctanoic acid (PFOA)
221,557,883221,557,883

Manganese
1581,526,87760912,984,741

Vanadium
851,277,29388739,454,509

Strontium-90
13938,369703,663,914

N-Nitrosodimethylamine (NDMA)
11809,042411,948,702

Nitrate and nitrite
9563,790733,169,693

Perfluorohexane sulfonate (PFHXS)
5460,5937641,634

Perchlorate
22410,838452,473,118

Perfluoroheptanoic acid (PFHPA)
5311,3689715,979

Carbon tetrachloride
4208,6894208,689

Benzo[a]pyrene
10136,46310136,463

Cadmium
1782,641501,365,053

Ethylene dibromide
369,1067621,948

Aluminum
1059,81934315,632,753

Benzene
346,360446,446

Strontium
343,30155238,021,261

Molybdenum
317,52749635,790,648

Thallium
33,28317659,466

Antimony
73,261311,259,187

Selenium
51,2841843,768,945

Beryllium
21,24022978,260

Chloromethane
2705823,182,755

Di(2-ethylhexyl) phthalate
166166

Tritium
164381,648,986

Barium
15162020,162,544

Mercury (inorganic)
14432733,454

1,2-Dichloropropane
1353104,768

Contaminants found in California above legal limits