Washington

2,289 Utilities
Serving: 6,467,000
Data available: 2014-2019
Contaminants Found: 108

EWG's drinking water quality report for Washington shows results of tests conducted by the water utilities in Washington and provided to EWG by the Washington State Department of Health.

LARGE UTILITIES

ALL UTILITIES WITH VIOLATIONS

LARGE UTILITIES WITH VIOLATIONS

Below are utilities in Washington 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 Washington

Utility	Location	People Served
Alderwood Water District	Lynnwood, WA	190,177
Arlington Water Department	Arlington, WA	18,952
Battle Ground Water Department	Battle Ground, WA	20,890
Beacon Hill Water & Sewer District	Kelso, WA	10,800
Bonney Lake Water Department	Bonney Lake, WA	37,780
Camas Municipal Water Sewer System	Camas, WA	23,020
Cedar River Water & Sewer District	Maple Valley, WA	25,323
Centralia Utilities	Centralia, WA	17,170
Chelan County PUD 1	Wenatchee, WA	14,189
Cheney, City of	Cheney, WA	10,700
City of Aberdeen	Aberdeen, WA	16,760
City of Anacortes	Mount Vernon, WA	16,780
City of Auburn	Auburn, WA	58,864
City of Bellevue	Bellevue, WA	150,206
City of Bellingham Water Division	Bellingham, WA	90,000
City of Bothell Water	Bothell, WA	17,248
City of Bremerton	Bremerton, WA	56,565
City of Edmonds	Edmonds, WA	27,300
City of Everett Public Works Department	Everett, WA	103,000
City of Grandview	Grandview, WA	11,010
City of Kelso	Kelso, WA	12,130
City of Kennewick	Richland, WA	86,115
City of Kirkland	Kirkland, WA	52,630
City of Lynnwood	Lynnwood, WA	36,950
City of Mercer Island	Mercer Island, WA	22,699
City of Moses Lake	Moses Lake, WA	22,930
City of Mountlake Terrace	Mountlake Terrace, WA	20,090
City of Oak Harbor	Oak Harbor, WA	17,084
City of Olympia	Olympia, WA	65,360
City of Port Angeles	Port Angeles, WA	19,038

Utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in Washington

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
Coxville Water Association #1	Benton City, WA	52	90
Red Gate Mobile Home Park	Port Orchard, WA	23	55
Country Club Estates	Port Orchard, WA	103	50
Mcneil Island Water	Steilacoom, WA	271	40
Lisecc	Lummi Island, WA	182	40
Marble Water System	Northport, WA	90	33
Devries Road Community Association	Oak Harbor, WA	76	30
Tanglewood Mobile Home Park	Wa, WA	63	26
Kontree Apartments Water System	Lynden, WA	60	25
Penn Cove Water and Sewer District	Oak Harbor, WA	460	25
Oysterville	Ilwaco, WA	59	25
Trails West Subdivision	Spokane, WA	25	22
Pinecroft Mobile Home Park	Port Orchard, WA	248	21
Alta Lake Golf Course Plat	Pateros, WA	89	21
Rainier Tracts Water Association	Othello, WA	61	21
Kahlotus City Of	Kahlotus, WA	182	20
Kepps Acres Association	Pasco, WA	35	20
Canyon Village Water System Inc.	Pasco, WA	310	20
Long Beach Water Department	Long Beach, WA	3,052	20
East Monitor Water Association	Monitor, WA	80	19
Johnson Creek Water Users Association	Tonasket, WA	48	17
Tiger Mtn Tracts	Issaquah, WA	30	16
Riverside Town Of	Riverside, WA	349	15
Ridgeview Estates Community Association	Freeland, WA	75	15
Fisherman Bay Water Association	Lopez Island, WA	230	15
Western State Hospital	Spanaway, WA	1,000	15
Home Valley Water District	Stevenson, WA	360	14
Fourth Of July Creek Estates	Colville, WA	25	14
Mesa Water Department	Mesa, WA	495	13
George City Of	George, WA	700	12

Large utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in Washington

Utility	Location	People Served	Violation Points
Ellensburg Water Department	Ellensburg, WA	19,960	6
City of Yakima Water Division	Yakima, WA	72,806	6
City of Grandview	Grandview, WA	11,010	1
City of Sunnyside	Sunnyside, WA	16,280	1
East Wenatchee Water District	East Wenatchee, WA	26,495	1
City of Richland	Richland, WA	57,303	1

Contaminants found in Washington above health guidelines

	Found above health guidelines			Found
Contaminant	# of Utilities	People Served		# of Utilities	People Served
Total trihalomethanes (TTHMs)		1,004	6,011,637			1,013	6,025,555
Bromodichloromethane		829	5,880,566			832	5,907,735
Chromium (hexavalent)		203	5,467,238			204	5,491,602
Haloacetic acids (HAA5)		665	5,334,557			667	5,377,349
Haloacetic acids (HAA9)		174	5,239,828			195	5,478,248
Chloroform		737	5,206,836			864	5,884,234
Nitrate		1,385	4,927,620			1,642	5,313,291
Trichloroacetic acid		471	4,836,751			474	4,872,548
Dichloroacetic acid		513	4,825,011			523	5,153,615
Dibromochloromethane		724	3,170,265			744	4,687,755
Nitrate and nitrite		834	3,159,009			888	3,263,465
Arsenic		935	3,037,088			935	3,037,088
Bromochloroacetic acid		287	2,109,876			293	3,243,116
Radium, combined (-226 & -228)		716	1,394,973			743	1,520,186
Dibromoacetic acid		278	1,295,701			279	1,314,801
Bromoform		316	506,808			452	2,210,646
Radon		5	240,523			5	240,523
Thallium		93	219,343			108	354,711
Chlorate		5	106,702			156	4,578,677
Chlorite		3	83,488			3	83,488
Manganese		189	81,027			1,183	5,730,079
Perfluorooctanoic acid (PFOA)		3	61,690			3	61,690
Bromate		7	37,804			35	1,598,432
Perfluorononanoic acid (PFNA)		1	32,603			1	32,603
Perfluoroheptanoic acid (PFHPA)		1	32,603			2	53,491
Perfluorooctane sulfonate (PFOS)		1	32,603			1	32,603
Perfluorohexane sulfonate (PFHXS)		1	32,603			1	32,603
Perfluorobutane sulfonate (PFBS)		1	32,603			1	32,603
Trichloroethylene		8	26,198			15	60,509
Tetrachloroethylene (perchloroethylene)		7	25,741			7	25,741
Uranium		21	12,360			27	13,672
Ethylene dibromide		1	2,765			1	2,765
Styrene		1	2,750			1	2,750
Cadmium		10	1,963			10	1,963
1,2-Dichloropropane		2	1,265			4	25,695
Carbon tetrachloride		2	820			3	860
Antimony		7	499			48	130,862
Chloromethane		2	240			51	200,709
Di(2-ethylhexyl) phthalate		2	168			17	16,911
Vanadium		1	100			196	5,303,949
Atrazine		1	48			2	348
Beryllium		1	45			4	200

Contaminants found in Washington above legal limits

Contaminant	People Served
Arsenic	14	7,162
Total trihalomethanes (TTHMs)	8	837
Nitrate and nitrite	4	690
Nitrate	4	568
Haloacetic acids (HAA5)	6	366
Radium, combined (-226 & -228)	1	349
Dinoseb	1	60
Uranium	1	48

Washington

2,289 Utilities

Serving: 6,467,000

Data available: 2014-2019

Contaminants Found: 108

Large utilities in Washington

Utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in Washington

Large utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in Washington

Contaminants found in Washington above health guidelines

Contaminants found in Washington above legal limits