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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
Apple Ave. Ws #03Greenfield, CA60131
Brock Mutual Water CompanyBakersfield, CA511131
Del Oro Grandview Gardens DistrictChico, CA389131
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
Rand Communities Water DistrictRandsburg, CA450102
Panoche Water DistrictFirebaugh, CA146102
Lake Of The Woods Mobile VillageLake Of The Woods, CA81100
Kettleman City Community Services DistrictKettleman City, CA1,450100
Caruthers Community Services DistrictCaruthers, CA2,497100
Saint Anthony Trailer ParkMecca, CA300100

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 SunnyvaleSunnyvale, CA147,05510
City of StocktonLodi, CA171,68710
Mid-Peninsula Water DistrictBelmont, CA28,05010
City of East Palo AltoEast Palo Alto, CA28,00010
Oildale MWCOildale, CA26,00010
City of TulareTulare, CA60,82310
Camp Pendleton (North)Camp Pendleton, CA15,60010
City of Palo AltoPalo Alto, CA62,00010
City of Menlo ParkMenlo Park, CA14,13910
City of TurlockTurlock, CA64,21510
City of FullertonFullerton, CA138,25110
Santa Maria Water DepartmentSanta Maria, CA100,3068
City of Rohnert ParkRohnert Park, CA40,9716
City of Modesto, SalidaModesto, CA24,4406
East Valley Water DistrictHighland, CA87,0005
City of UplandUpland, CA78,7915
Rincon Del Diablo MWD(ID-1)Escondido, CA24,5455
Calif State Polytechnical Univ - PomonaPomona, CA24,8805
Montecito Water DistrictSanta Barbara, CA13,5005
City of FresnoFresno, CA522,3525
City of BurlingameBurlingame, CA29,8675

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

Contaminant# of UtilitiesPeople Served

Nitrate and nitrite		19208,393

Total trihalomethanes (TTHMs)		3084,278

Arsenic		12071,021

Nitrate		4041,839

Trichloroethylene		132,230

Haloacetic acids (HAA5)		2217,687

Uranium		4116,727

Tetrachloroethylene (perchloroethylene)		28,200

Fluoride		41,589

Selenium		81,275

Dichloromethane (methylene chloride)		4803

Radium, combined (-226 & -228)		1707

1,2-Dibromo-3-chloropropane (DBCP)		1438

Antimony		1139

Cadmium		187