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EWG's Tap Water Database — 2019 UPDATE

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California

  • 2,902 Utilities

  • Serving: 40,620,000

  • Data available: 2012-2017

  • Contaminants Found: 135

 

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
Antelope Valley - East Kern Water AgencyPalmdale, CA114,260
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 State FairSacramento, CA90,000
California State University FresnoFresno, CA23,000
California Water Service (CWS) - BakersfieldSan Jose, CA246,371
More

Utilities that accumulated/accrued the most violation points as of April 2016 to March 2019 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
Sonoma County Mutual Water CompanyCazadero, CA40270
Rainbird Valley Mutual Water CompanyWeldon, CA188230
Son Shine PropertiesEdison, CA438210
East Wilson Road Water CompanyBakersfield, CA35205
Wilson Road Water CommunityBakersfield, CA72191
Hillview Water Company-oakhurst/sierra LakesOakhurst, CA2,805190
Ironwood CampNewberry Springs, CA1,000180
Springfield Water CompanyWatsonville, CA200170
Sierra Vista AssociationDelano, CA44166
Gleanings For The HungrySultana, CA31164
Quiet Oaks Mobile Home ParkWarner Springs, CA120160
Ramona Water CompanyAnza, CA250154
Vista Del Toro WsSalinas, CA87146
River Rd. Ws #25Gonzales, CA65141
El Camino Water Company Inc.Spreckels, CA90141
Sierra Mutual Water CompanyPorterville, CA39132
Brock Mutual Water CompanyBakersfield, CA511131
Del Oro Grandview Gardens DistrictChico, CA389131
Apple Ave. Ws #03Greenfield, CA60131
San Miguel Ws #01Royal Oaks, CA100130
Triple R Mutual Water CompanySpringville, CA400120
Land Project Mutual Water CompanyLancaster, CA1,500114
Encinal Rd. Ws #01Salinas, CA41105
Fountain Trailer Park WaterCalabasas, CA68103
Panoche Water DistrictFirebaugh, CA146102
Rand Communities Water DistrictRandsburg, CA450102
Caruthers Community Services DistrictCaruthers, CA2,497100
Saint Anthony Trailer ParkMecca, CA300100
Lake Of The Woods Mobile VillageLake Of The Woods, CA81100
Kettleman City Community Services DistrictKettleman City, CA1,450100

Large utilities that accumulated/accrued the most violation points as of April 2016 to March 2019 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
City of LemooreLemoore, CA24,94585
US Army Fort IrwinFort Irwin, CA16,00081
City of LindsayLindsay, CA13,44566
CoalingaCoalinga, CA19,36242
City of LivingstonLivingston, CA14,89431
City of NapaNapa, CA172,10225
City of HanfordHanford, CA55,88020
City of American CanyonAmerican Canyon, CA20,08215
Sonoma State UniversityRohnert Park, CA10,38611
City of Menlo ParkMenlo Park, CA14,13910
City of TulareTulare, CA60,82310
City of Palo AltoPalo Alto, CA62,00010
City of SunnyvaleSunnyvale, CA147,05510
Camp Pendleton (North)Camp Pendleton, CA15,60010
City of TurlockTurlock, CA64,21510
Oildale MWCOildale, CA26,00010
City of East Palo AltoEast Palo Alto, CA28,00010
City of StocktonLodi, CA171,68710
City of FullertonFullerton, CA138,25110
Mid-Peninsula Water DistrictBelmont, CA28,05010
Santa Maria Water DepartmentSanta Maria, CA100,3068
City of Modesto, SalidaModesto, CA24,4406
City of Rohnert ParkRohnert Park, CA40,9716
City of CeresCeres, CA42,6665
City of ShafterShafter, CA16,9285
East Valley Water DistrictHighland, CA87,0005
City of BurlingameBurlingame, CA29,8675
Rincon Del Diablo MWD(ID-1)Escondido, CA24,5455
Great Oaks Water Company Inc.San Jose, CA99,1995
City of FresnoFresno, CA522,3525

Contaminants found in California above health guidelines

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

Total trihalomethanes (TTHMs)
1,37339,440,3171,37839,580,521

Haloacetic acids (HAA5)
1,16037,467,3731,16537,579,452

Chromium (hexavalent)
1,35937,081,5911,39538,680,157

Bromodichloromethane
1,11132,502,3021,13633,544,530

Dibromochloromethane
1,11331,912,8881,14733,428,186

Chloroform
91330,473,3141,06633,799,571

Nitrate
1,81930,152,5372,01934,891,844

Dibromoacetic acid
92530,091,64493831,301,064

Dichloroacetic acid
78429,019,28482430,207,159

Uranium
88928,641,89592429,988,478

Trichloroacetic acid
76528,240,27479229,243,638

Bromoform
85527,456,4331,06332,901,519

Nitrate and nitrite
1,01226,553,7881,05630,578,192

Arsenic
1,19926,208,7241,19726,190,224

Bromate
20619,675,25720219,886,212

Bromochloroacetic acid
20511,973,89220511,973,892

Radium, combined (-226 & -228)
43711,204,73846712,431,577

Strontium-90
1038,249,27614110,659,081

Chlorate
955,241,85852937,276,612

Tetrachloroethylene (perchloroethylene)
994,523,92312110,931,487

Radon
833,718,007833,718,007

1,2-Dibromo-3-chloropropane (DBCP)
1033,364,5631134,457,333

1,2,3-Trichloropropane
832,911,592967,553,663

1,4-Dioxane
512,802,47419017,720,771

Perfluorooctane sulfonate (PFOS)
202,031,706202,031,706

Trichloroethylene
391,893,692859,091,846

Chlorite
61,644,29981,822,215

Perfluorooctanoic acid (PFOA)
221,558,124221,558,124

Vanadium
881,275,12690738,636,064

N-Nitrosodimethylamine (NDMA)
10666,931614,088,419

Perfluorohexane sulfonate (PFHXS)
7477,6939658,734

Perchlorate
28380,007894,626,559

Perfluoroheptanoic acid (PFHPA)
7328,46812772,479

Manganese
251325,3101,00620,414,456

Carbon tetrachloride
5208,8397315,135

Cadmium
61194,488981,664,593

Ethylene dibromide
369,1067668,354

Di(2-ethylhexyl) phthalate
248,6897145,272

Strontium
343,30152337,838,134

Perfluorononanoic acid (PFNA)
139,400139,400

Tritium
319,31414512,212,002

Molybdenum
317,52747534,696,988

Benzene
113,800650,396

Thallium
1510,49135924,702

Aluminum
138,47359118,121,598

Atrazine
16,30916,309

Beryllium
33,747291,098,025

Dichloromethane (methylene chloride)
63,513582,466,693

Antimony
83,027411,310,507

Selenium
112,40938710,920,175

1,2-Dichloropropane
31,51111572,318

Barium
34311,16923,135,288

Styrene
1370171,131,084

Chloromethane
1290863,340,577

Mercury (inorganic)
273571,062,483

Contaminants found in California above legal limits