California

2,902 Utilities
Serving: 40,620,000
Data available: 2012-2017
Contaminants Found: 136

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

Utility	Location	People Served
Alameda County Water District	Fremont, CA	340,000
Alco Water Service	Salinas, CA	29,179
Antelope Valley - East Kern Water Agency	Palmdale, CA	114,260
Apple Valley Ranchos Water Company	Apple Valley, CA	62,602
Arroyo Grande,Water Department	Arroyo Grande, CA	17,064
Arvin Community Services District	Arvin, CA	19,000
Atascadero Mutual Water Company	Atascadero, CA	30,332
Azusa Light and Water	Azusa, CA	110,000
Beaumont Cherry Valley WD	Beaumont, CA	44,000
Bella Vista Water District	Redding, CA	18,426
Bellflower - Somerset MWC	Bellflower, CA	46,000
Beverly Hills Water Department	Beverly Hills, CA	44,290
Big Bear City CSD	Big Bear City, CA	12,411
Burbank Water Department	Burbank, CA	105,543
Cal American Water Company	Newbury Park, CA	61,206
Cal-am Water Company - Duarte	Rosemead, CA	21,589
Cal-water Service Company - Chico	Chico, CA	100,435
Cal-water Service Company - Marysville	Chico, CA	12,017
Cal/am Water Company - Baldwin Hills	Rosemead, CA	18,397
Cal/Am Water Company - San Marino	Rosemead, CA	40,804
Calif State Polytechnical Univ - Pomona	Pomona, CA	24,880
California American Water Company - Antelope	Sacramento, CA	34,168
California American Water Company - Coronado	Imperial Beach, CA	96,000
California American Water Company - Lincoln Oaks	Sacramento, CA	46,606
California American Water Company - Monterey	Monterey, CA	96,754
California American Water Company - Parkway	Sacramento, CA	44,949
California American Water Company - Suburban	Sacramento, CA	111,768
California State Fair	Sacramento, CA	90,000
California State University Fresno	Fresno, CA	23,000
California Water Service (CWS) - Bakersfield	San Jose, CA	246,371

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.

Utility	Location	People Served	Violation Points
Sonoma County Mutual Water Company	Cazadero, CA	40	270
Rainbird Valley Mutual Water Company	Weldon, CA	188	230
Son Shine Properties	Edison, CA	438	210
East Wilson Road Water Company	Bakersfield, CA	35	205
Wilson Road Water Community	Bakersfield, CA	72	191
Hillview Water Company-oakhurst/sierra Lakes	Oakhurst, CA	2,805	190
Ironwood Camp	Newberry Springs, CA	1,000	180
Springfield Water Company	Watsonville, CA	200	170
Sierra Vista Association	Delano, CA	44	166
Gleanings For The Hungry	Sultana, CA	31	164
Quiet Oaks Mobile Home Park	Warner Springs, CA	120	160
Ramona Water Company	Anza, CA	250	154
Vista Del Toro Ws	Salinas, CA	87	146
River Rd. Ws #25	Gonzales, CA	65	141
El Camino Water Company Inc.	Spreckels, CA	90	141
Sierra Mutual Water Company	Porterville, CA	39	132
Brock Mutual Water Company	Bakersfield, CA	511	131
Del Oro Grandview Gardens District	Chico, CA	389	131
Apple Ave. Ws #03	Greenfield, CA	60	131
San Miguel Ws #01	Royal Oaks, CA	100	130
Triple R Mutual Water Company	Springville, CA	400	120
Land Project Mutual Water Company	Lancaster, CA	1,500	114
Encinal Rd. Ws #01	Salinas, CA	41	105
Fountain Trailer Park Water	Calabasas, CA	68	103
Panoche Water District	Firebaugh, CA	146	102
Rand Communities Water District	Randsburg, CA	450	102
Caruthers Community Services District	Caruthers, CA	2,497	100
Saint Anthony Trailer Park	Mecca, CA	300	100
Lake Of The Woods Mobile Village	Lake Of The Woods, CA	81	100
Kettleman City Community Services District	Kettleman City, CA	1,450	100

Large utilities that accumulated/accrued the most violation points as of April 2016 to March 2019 in California

Utility	Location	People Served	Violation Points
City of Lemoore	Lemoore, CA	24,945	85
US Army Fort Irwin	Fort Irwin, CA	16,000	81
City of Lindsay	Lindsay, CA	13,445	66
Coalinga	Coalinga, CA	19,362	42
City of Livingston	Livingston, CA	14,894	31
City of Napa	Napa, CA	172,102	25
City of Hanford	Hanford, CA	55,880	20
City of American Canyon	American Canyon, CA	20,082	15
Sonoma State University	Rohnert Park, CA	10,386	11
City of Sunnyvale	Sunnyvale, CA	147,055	10
Camp Pendleton (North)	Camp Pendleton, CA	15,600	10
City of Turlock	Turlock, CA	64,215	10
Oildale MWC	Oildale, CA	26,000	10
City of East Palo Alto	East Palo Alto, CA	28,000	10
City of Stockton	Lodi, CA	171,687	10
City of Fullerton	Fullerton, CA	138,251	10
Mid-Peninsula Water District	Belmont, CA	28,050	10
City of Menlo Park	Menlo Park, CA	14,139	10
City of Tulare	Tulare, CA	60,823	10
City of Palo Alto	Palo Alto, CA	62,000	10
Santa Maria Water Department	Santa Maria, CA	100,306	8
City of Rohnert Park	Rohnert Park, CA	40,971	6
City of Modesto, Salida	Modesto, CA	24,440	6
City of Calexico	Calexico, CA	38,572	5
City of Corona	Corona, CA	155,896	5
Montecito Water District	Santa Barbara, CA	13,500	5
City of Upland	Upland, CA	78,791	5
City of Ceres	Ceres, CA	42,666	5
City of Shafter	Shafter, CA	16,928	5
East Valley Water District	Highland, CA	87,000	5

Contaminants found in California above health guidelines

	Found above health guidelines			Found
Contaminant	# of Utilities	People Served		# of Utilities	People Served
Total trihalomethanes (TTHMs)		1,379	39,566,882			1,384	39,707,086
Chromium (hexavalent)		1,360	37,084,871			1,396	38,683,437
Bromodichloromethane		1,117	32,617,817			1,142	33,660,045
Dibromochloromethane		1,112	31,847,516			1,147	33,454,021
Chloroform		917	30,581,098			1,070	33,905,483
Nitrate		1,819	30,149,307			2,019	34,888,614
Uranium		888	28,641,870			924	29,990,153
Dichloroacetic acid		708	27,753,414			832	30,332,126
Bromoform		855	27,456,433			1,064	32,992,726
Nitrate and nitrite		1,012	26,550,558			1,056	30,574,962
Arsenic		1,199	26,205,494			1,197	26,186,994
Trichloroacetic acid		680	25,934,792			799	29,359,266
Bromate		206	19,675,257			202	19,886,212
Radium, combined (-226 & -228)		437	11,199,601			467	12,426,440
Strontium-90		104	8,250,976			141	10,448,781
Chlorate		96	5,254,191			529	37,276,612
Tetrachloroethylene (perchloroethylene)		99	4,523,923			121	10,931,487
Radon		81	3,643,348			81	3,643,348
1,2-Dibromo-3-chloropropane (DBCP)		103	3,364,563			113	4,457,333
1,2,3-Trichloropropane		84	2,911,745			97	7,553,816
1,4-Dioxane		51	2,802,474			190	17,720,771
N-Nitrosodimethylamine (NDMA)		19	2,251,189			61	4,088,419
Perfluorooctane sulfonate (PFOS)		20	2,031,706			20	2,031,706
Trichloroethylene		39	1,893,692			85	9,091,846
Chlorite		6	1,644,299			8	1,822,215
Perfluorooctanoic acid (PFOA)		22	1,558,124			22	1,558,124
Vanadium		88	1,275,126			907	38,636,064
Perfluorohexane sulfonate (PFHXS)		7	477,693			9	658,734
Perchlorate		28	380,007			89	4,626,559
Perfluoroheptanoic acid (PFHPA)		7	328,468			12	772,479
Manganese		252	325,360			1,007	20,490,681
Carbon tetrachloride		5	208,839			7	315,135
Cadmium		61	194,488			98	1,664,593
Aluminum		15	83,581			590	18,157,293
Ethylene dibromide		3	69,106			7	668,354
Di(2-ethylhexyl) phthalate		2	48,689			7	145,272
Strontium		3	43,301			523	37,838,134
Tritium		3	19,314			145	12,212,002
Molybdenum		4	17,663			476	34,697,124
Benzene		1	13,800			6	50,396
Thallium		15	10,491			35	924,702
Atrazine		1	6,309			1	6,309
Beryllium		3	3,747			29	1,098,025
Dichloromethane (methylene chloride)		6	3,513			58	2,466,693
Antimony		8	3,027			41	1,310,507
Selenium		11	2,409			387	10,920,175
1,2-Dichloropropane		3	1,511			11	572,318
Barium		4	761			1,169	23,132,338
Styrene		1	370			17	1,131,084
Chloromethane		1	290			86	3,340,577
Mercury (inorganic)		2	73			57	1,062,483

Contaminants found in California above legal limits

Contaminant	People Served
Nitrate and nitrite	20	208,493
Total trihalomethanes (TTHMs)	30	84,278
Arsenic	120	71,021
Nitrate	40	41,839
Trichloroethylene	1	32,230
Haloacetic acids (HAA5)	22	17,687
Uranium	41	16,727
Tetrachloroethylene (perchloroethylene)	2	8,200
Fluoride	4	1,589
Selenium	8	1,275
Dichloromethane (methylene chloride)	4	803
Radium, combined (-226 & -228)	1	707
1,2-Dibromo-3-chloropropane (DBCP)	1	438
Barium	1	330
Antimony	1	139
Cadmium	1	87

California

2,902 Utilities

Serving: 40,620,000

Data available: 2012-2017

Contaminants Found: 136

Large utilities in California

Utilities that accumulated/accrued the most violation points as of April 2016 to March 2019 in California

Large utilities that accumulated/accrued the most violation points as of April 2016 to March 2019 in California

Contaminants found in California above health guidelines

Contaminants found in California above legal limits