Washington utilities 401 to 500.

Each serves 643 to 1,173 people, as it reports to EPA. Your ZIP code finds yours faster.

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401 to 500 of 2,220, by people served

Washington utilities, 401 to 500 of 2,220, by people served
Utility	Based in	Serves	Regulated PFAS	Health-based violations since 2016
Town of Twisp	Twisp	1,173	Not sampled	0
Ponderosa Community Club Inc	Leavenworth	1,170	Not sampled	0
Monse - Riggan Camp	Brewster	1,165	Not sampled	1
Weiler - Martin Tracts Water Assn	Quincy	1,163	Not sampled	1
Basin Water Sources Inc	Cle Elum	1,158	Not sampled	0
Meadowmeer	Port Orchard	1,157	Not sampled	1
Boston Harbor	Olympia	1,153	Not sampled	5
Pateros Water Department	Pateros	1,149	Not sampled	0
Newberry Hill	Poulsbo	1,143	Not sampled	0
Ashford Water District	Ashford	1,141	Not sampled	0
Town of Waterville	Waterville	1,140	Not sampled	0
Quistorff	Tacoma	1,113	PFOS, PFHxS, PFBS	0
W&B Waterworks 1	Freeland	1,112	Not sampled	0
Crescent Bar System	Ephrata	1,108	Not sampled	0
Beards Cove	Shelton	1,100	Not sampled	0
City of Tekoa	Tekoa	1,076	Not sampled	0
Sunshine Acres	Tacoma	1,074	Not sampled	0
Miller Bay	Poulsbo	1,072	Not sampled	0
Camano Co - Op Water & Power Co	MT Vernon	1,071	Not sampled	0
Wilkeson Water Department	Wilkeson	1,071	Not sampled	0
Holiday Ranchettes	Tacoma	1,050	Not sampled	0
City of North Bonneville	North Bonneville	1,048	Not sampled	0
Fawn Lake Maintenance Comm	Shelton	1,044	Not sampled	0
Estates Inc	Sequim	1,043	Not sampled	0
Town of Wilbur	Spokane	1,040	Not sampled	0
Bayview Beach Water District	Freeland	1,035	Not sampled	0
City of George	George	1,035	Not sampled	0
Cape George Colony Club Inc	Belfair	1,022	Not sampled	0
Samish Farms Water Assn	Bow	1,017	Not sampled	0
Lake Quinault	Port Orchard	1,003	Not sampled	0
Sunserra at Crescent Bar	Quincy	1,000	Not sampled	0
Underwood	Carson	1,000	Not sampled	0
Dockton Water Association	Vashon	992	Not sampled	0
Glacier Springs Water Assn	Trout Lake	992	Not sampled	0
Amboy Clark Public Utilities	Vancouver	991	Not sampled	0
Odessa		986	Not sampled	0
Vader - Enchanted Valley	Chehalis	985	Not sampled	2
The Buttes	Puyallup	973	Not sampled	0
Marion Water Co Inc	Port Orchard	966	Not sampled	0
Burton Water Cooperative	Vashon	964	Not sampled	0
Yak Co - Buena Water System	Yakima	952	Not sampled	0
Town of Coulee City	Coulee City	944	Not sampled	0
Cape Horn Maintenance Company	MT Vernon	940	Not sampled	0
Lyle Water System	Goldendale	938	Not sampled	0
Preston Industrial Park Water Assn	Port Orchard	930	Not sampled	0
Sunwood Lakes Homeowners Assoc Inc	Port Orchard	925	Not sampled	0
Long Lake View Est 2 5	Poulsbo	923	Not sampled	0
Puget Island	Cathlamet	920	Not sampled	0
Lake Cushman System 3	Hoodsport	917	Not sampled	0
Country/Eldorado Water System	Puyallup	915	Not sampled	0
Lake Lawrence	Tacoma	914	Not sampled	0
Town of Lind	Lind	903	Not sampled	0
Scatchet Head Water District	Coupeville	900	Not sampled	1
Shoalwater Bay	Tokeland	898	None found	0
Solmar Water	Sequim	895	Not sampled	0
Island Lake	Freeland	883	Not sampled	0
Carbonado Water Dept	Carbonado	875	Not sampled	0
Rolling Hills - Glencairn	Oak Harbor	872	Not sampled	9
Adams County Water Dist #1	Othello	870	Not sampled	0
Admirals Cove Water District	Freeland	870	Not sampled	0
Lake of the Woods Community Club	Gig Harbor	870	Not sampled	1
Town of Pe Ell	Pe Ell	859	Not sampled	3
Town of Rosalia	Rosalia	831	Not sampled	0
Hangman Hills Water Dist 15	Spokane	827	Not sampled	0
Camaloch Association	Coupeville	825	Not sampled	0
Diamond Point	Freeland	810	Not sampled	1
Town of St John	St John	800	Not sampled	0
Rosedale East	Tacoma	798	Not sampled	0
Whatcom County Water Dist 13	Maple Falls	795	None found	0
Western Wahkiakum	Cathlamet	791	Not sampled	0
Valle Lindo Homes	Walla Walla	787	Not sampled	0
Sno PUD 1 - Storm Lake Ridge	Everett	786	Not sampled	0
Veterans Affair Med Ctr Dept of	Yakima	785	Not sampled	0
Hillcrest Village Water Co Inc	Oak Harbor	770	Not sampled	0
Scenic Shores Water Company	Port Orchard	761	Not sampled	0
Northgate Terrace Community Club	Coupeville	750	Not sampled	0
Lake Holiday Association	Port Orchard	740	Not sampled	0
Lewis Co Water Sewer Dist #6	Mossyrock	740	Not sampled	1
Lost Lake Property Owners Assn	Coupeville	736	None found	0
Stevens Co PUD - Clayton	Loon Lake	725	Not sampled	0
Lynch Cove	Freeland	721	Not sampled	0
Sun Cove Public Water System	Cashmere	716	Not sampled	0
Lyman Water Department	MT Vernon	705	Not sampled	0
Kittitas County Water District #5	Cle Elum	700	Not sampled	0
Union	Union	700	Not sampled	0
Oak Park	Shelton	695	Not sampled	0
Garfield Water Department	Tekoa	694	Not sampled	0
McNeil Island Water	Tumwater	692	Not sampled	14
Grandview Condominiums	Port Orchard	679	Not sampled	0
Town of Cusick	Cusick	672	Not sampled	3
Chinook Water District	Chinook	664	Not sampled	0
Wilderness Ridge Community Club	Coupeville	664	Not sampled	0
Del Mar Community Service	Anacortes	657	Not sampled	0
Great Basin Water Burbank	Pasco	656	Not sampled	5
City of Harrington	Waverly	650	None found	0
Three Lakes Water District	Malaga	650	Not sampled	0
Vistaire Water System	Clinton	647	Not sampled	1
Startup Water District	Startup	643	Not sampled	0
Town of Fairfield	Tekoa	643	Not sampled	0
Washington Soldiers Home Colony	Port Orchard	643	Not sampled	0

Every utility EPA sampled for PFAS under UCMR 5, any other community system serving 3,300 people or more, and any smaller one with results from 2020 on, from the state. Other systems appear in ZIP code results. People served is what each utility reports to EPA. Data: EPA SDWIS 2026 Q3, UCMR 5 and EPA’s 2012 to 2019 compliance results, and Washington State Department of Health, Office of Drinking Water.

401 to 500 of 2,220, by people served

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