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Washington utilities 501 to 600.

Each serves 457 to 639 people, as it reports to EPA. Your ZIP code finds yours faster.

Matched to your utility using EPA records.

501 to 600 of 2,220, by people served

Washington utilities, 501 to 600 of 2,220, by people served
UtilityBased inServesRegulated PFASHealth-based violations since 2016
Cedar Creek Corrections CenterLittlerock639Not sampled0
Jaw Farms IncMalott636Not sampled0
Alderwood EstatesPuyallup635Not sampled0
Duck Lake Water AssociationOkanogan635Not sampled0
Colton Water DepartmentColton632Not sampled0
Glenwood Water SystemGoldendale629Not sampled0
Bywater BayPort Townsend628Not sampled0
Priest Point Beach Water IncArlington624Not sampled0
Bridgehaven Community ClubPort Ludlow623Not sampled2
Mecca Community AssociationCoupeville619Not sampled0
Lacamas FarmsteadsTacoma615Not sampled0
Ridge Water AssociationSpokane615Not sampled0
Wicks Lake RanchesTacoma615Not sampled0
Lewis Co Water Dist #3Randle611Not sampled0
SeabeckPoulsbo610None found0
Albion Water DeptAlbion600Not sampled0
Jefferson County Water Dist #1Port Ludlow600Not sampled0
McKenna Water DistrictMcKenna600Not sampled0
Wishram Water SystemGoldendale599Not sampled0
Dallesport Water DistrictDallesport598Not sampled0
Sandy Hook Park Community ClubPort Orchard593Not sampled0
Town of Metaline FallsNewport593Not sampled0
Camano Vista Water DistrictCoupeville591Not sampled0
Bay CenterRaymond579Not sampled0
Bucoda Water DeptBucoda579Not sampled0
Meadowbrook Water AssociationLynden579Not sampled0
Raft IslandTacoma575Not sampled0
City of SpragueSprague570Not sampled0
Town of RockfordRockford570Not sampled0
Consolidated Support ServicesMedical Lake569None found0
Acme Water District No 18Acme568Not sampled0
North Whidbey Water DistrictOak Harbor568Not sampled0
Westside Water AssnVashion Island562Not sampled0
Key Center Water SystemGig Harbor561Not sampled0
Sno PUD 1 - Sunday LakeEverett561Not sampled0
Tahuyeh Lake Community ClubPort Orchard560Not sampled0
Dungeness HeightsYelm558Not sampled0
Oasis Water CorporationPasco556Not sampled0
Rainier SchoolBuckley556Not sampled1
Green Tank Irr District 11Walla Walla553Not sampled0
Klickitat Water SystemGoldendale551Not sampled0
Crescent Park 355Lacey550Not sampled0
Stevens Co PUD - ValleyLoon Lake550None found0
FoxhallTacoma549Not sampled0
Brewster Flat Domestic Water AssnBrewster542Not sampled0
South Cle Elum Water DeptSouth Cle Elum541Not sampled0
Hamilton Water DepartmentMaple Falls540Not sampled0
Inchelium Water DistrictTonasket540Not sampled1
Old Settlers Water AssociationCuster540Not sampled0
Sandy Hook Yacht Club EstatesFreeland540Not sampled0
Shore Acres Water CompanyGig Harbor540Not sampled0
Madrona Beach Comm Water SystemStanwood539Not sampled0
Stevens Co PUD - Spokane Lake ParkLoon Lake532Not sampled0
Burbank Irrigation District 4Pasco527Not sampled0
Bethel Green Acres Water AssnTacoma522Not sampled0
Town of PrescottWalla Walla522Not sampled0
Great Basin Water KionaPasco520Not sampled0
MT. Vista - Dungeness Golf CourseSequim517None found0
Rolling Firs Evergreen TerraceTacoma514Not sampled0
Kittitas County Water District #4Thorp510Not sampled0
Nespelem Water DeptNespelem510Not sampled0
Stevens Co PUD - West ShoreLoon Lake505Not sampled0
Deming Water Assoc.Deming501Not sampled0
Columbia View Water SystemWest Richland500Not sampled0
Home Valley Water DistrictStevenson500Not sampled0
Mount Baker Water AssociationBellingham500Not sampled1
Sunvista Sunlight Beach HOACoupeville500Not sampled0
Silver HawkPort Orchard499Not sampled0
Sea View Water LLCFreeland496Not sampled0
Lagoon Point Water DistrictGreenbank495Not sampled0
Mesa Water DepartmentMesa495Not sampled0
Newaukum Hill Water AssnChehalis493Not sampled0
Quail Run 667Lacey493Not sampled0
South Fox Island Water SystemGig Harbor493Not sampled0
Town of OakesdaleOaksdale492Not sampled0
P and G Orchards Camp 2Brewster489Not sampled0
Town of South PrairieSouth Prairie489Not sampled0
Countrywood Estates 680Lacey488Not sampled0
Dungeness MeadowsSequim488None found0
Endicott Water DeptWaverly488Not sampled0
Roosevelt Lake RanchWilbur487Not sampled0
Spo Co Water Dist 3 Sys 5Spokane485Not sampled0
S & ITacoma482Not sampled0
Twanoh Falls Beach ClubShelton481Not sampled0
Arlenes AdditionBurbank480Not sampled0
Classic HeightsTacoma480Not sampled0
Black Lake Bible Camp & Conf CtrOlympia477Not sampled1
Saratoga Water DistrictCoupeville477Not sampled10
Louie Joe Water AssociationEverson471Not sampled0
Pomona View Mobile ParkYakima470Not sampled0
Sugarloaf Water SystemKent468Not sampled0
MonterraSequim464Not sampled0
Kittitas County Water District #7Cle Elum463Not sampled0
Lake AlysonFreeland463Not sampled1
Dungeness Bay PlatSequim461Not sampled0
Hartstene PointeShelton460Not sampled4
Penn Cove Water and Sewer DistrictOak Harbor460Not sampled20
Wilkshire Lane Water District IncArlington460Not sampled0
Dugualla Community IncOak Harbor459Not sampled0
Wandering Creek Homeowners AssocBothell457Not sampled0

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.