Washington utilities 201 to 261.

Each serves 28 to 4,414 people, as it reports to EPA. Your ZIP code finds yours faster.

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201 to 261 of 261, by people served

Washington utilities, 201 to 261 of 261, by people served
Utility	Based in	Serves	Regulated PFAS	Health-based violations since 2016
South Bainbridge	Poulsbo	4,414	Not sampled	0
Castle Rock Municipal Water	Castle Rock	4,367	None found	0
Orchard Avenue Irrigation Dist 6	Spokane	4,330	None found	0
City of Goldendale	Goldendale	4,314	None found	0
East Spokane Water Dist 1	Spokane Valley	4,285	PFOS	0
Trentwood Irrigation District 3	Spokane	4,228	PFOA, PFOS, PFBS	0
Suquamish	Poulsbo	4,203	None found	0
Crystal Mountain Inc	Raymond	4,154	None found	0
Irvin Water District #6	Spokane	4,150	None found	0
Town of Coupeville	Coupeville	4,142	PFOA, PFHxS, PFBS	0
City of White Salmon	White Salmon	4,077	None found	4
Granger Water Department	Granger	3,993	None found	0
Eatonville Water Dept	Eatonville	3,945	None found	0
City of Everson	Everson	3,893	None found	0
City of Brewster	Brewster	3,843	Not sampled	0
City of Okanogan Water Department	Okanogan	3,817	Not sampled	0
King County Water District 119	Duvall	3,800	None found	0
Spo Co Water Dist 3 Sys 3	Spokane	3,768	None found	0
Grand Mound	Olympia	3,764	Not sampled	0
Parkview Terrace	Tacoma	3,730	PFBS	0
Eastsound Water Users Association	Eastsound	3,711	None found	1
Lummi Tribal Water District	Ferndale	3,699	None found	1
Lake Cushman System 5	Hoodsport	3,675	None found	0
Town of Friday Harbor	Friday Harbor	3,543	None found	0
Roosevelt Water Association	Snohomish	3,530	Not sampled	0
City of Zillah	Zillah	3,518	Not sampled	1
Town of Naches	Naches	3,512	None found	0
City of Colfax Water Department	Colfax	3,507	None found	0
City of Winlock	Winlock	3,502	Not sampled	0
Forks Municipal Water Dept	Forks	3,468	None found	0
Horizons West	Tacoma	3,454	None found	0
Royal City Water	Royal City	3,389	Not sampled	0
Dayton Water Department	Dayton	3,374	Not sampled	0
City of Tenino	Tenino	3,336	None found	0
City of Newport	Newport	3,331	Not sampled	0
Algona Water Dept	Algona	3,300	Not sampled	0
Lake Forest Park Water District	Lake Forest Park	3,171	None found	0
Snake River Housing Water System	Yakima	3,036	None found	0
McCormick Woods	Port Orchard	2,760	None found	0
West Sequim Bay Inc	Sequim	2,759	None found	0
City of Gold Bar	Goldbar	2,745	None found	0
Columbia Valley Water District	Maple Falls	2,648	None found	0
Crescent Water Assn	Joyce	2,360	None found	1
Shelter Bay Community Inc	La Conner	2,212	None found	0
Heights Water	Vashon	2,051	None found	0
Quistorff	Tacoma	1,113	PFOS, PFHxS, PFBS	0
Shoalwater Bay	Tokeland	898	None found	0
Whatcom County Water Dist 13	Maple Falls	795	None found	0
Lost Lake Property Owners Assn	Coupeville	736	None found	0
City of Harrington	Waverly	650	None found	0
Seabeck	Poulsbo	610	None found	0
Consolidated Support Services	Medical Lake	569	None found	0
Stevens Co PUD - Valley	Loon Lake	550	None found	0
MT. Vista - Dungeness Golf Course	Sequim	517	None found	0
Dungeness Meadows	Sequim	488	None found	0
Northwest Water Assoc. Inc.	Lynden	400	PFOA, PFBS	0
Emerald Lake	Shelton	331	None found	0
Bayshore	Union	130	None found	0
Hi Valley View	Yakima	67	None found	0
Cedar Grove Mobile Park	Sequim	40	None found	0
Seascape Water Association	Stanwood	28	None found	0

Utilities EPA sampled under UCMR 5, plus any other community system serving 3,300 people or more. Smaller systems appear in ZIP code results. People served is what each utility reports to EPA. Data: EPA SDWIS 2026 Q2 and UCMR 5.