Home › PFAS › WA

PFAS in drinking water: Washington

EPA UCMR 5 results for 248 public water systems. 68 had at least one PFAS detected; 34 had a highest single PFOA or PFOS result above 4.0 ppt.

UCMR 5 is a one-time EPA monitoring program, not a compliance determination. The values shown are the highest single sample result at any of the system's sampling points; one result above 4.0 ppt does not mean the system violates the PFAS rule, which is judged on running annual averages under separate compliance monitoring. Results describe the public water system, not an individual home.

Water systemServesPFOA max (ppt)PFOS max (ppt)PFAS detected
Aberdeen City Of
WA5300050		Grays Harbor CountyNDND0
Airway Heights City Of
WA5300650		Spokane CountyNDND4
Alderwood Water District
WA5301300		Snohomish CountyNDND0
Anacortes City Of
WA5302200		Skagit CountyNDND0
Arlington Water Dept
WA5302950		Snohomish CountyNDND1
Artondale Water System
WA5303160		Pierce County6.3153.68
Auburn City Of
WA5303350		King CountyNDND1
Bainbridge Island City Of
WA5397650		Kitsap CountyNDND0
Battle Ground Water Dept City Of
WA5304700		Clark CountyNDND0
Bayshore
WA5304900		Mason CountyNDND0
Beacon Hill Water & Sewer District
WA5315650		Cowlitz CountyNDND0
Bellevue City Of
WA5305575		King CountyNDND0
Bellingham-Water Division City Of
WA5305600		Whatcom CountyNDND0
Benton City Water
WA5305800		Benton CountyND8.76
Birch Bay Water & Sewer District
WA5395904		Whatcom CountyNDND0
Blaine City Of
WA5307300		Whatcom CountyNDND0
Bonney Lake Water Department City
WA5307650		Pierce CountyNDND1
Bothell Water City Of
WA5307900		King CountyNDND0
Bremerton City Of
WA5308200		Kitsap CountyNDND1
Buckley Water
WA5309000		Pierce CountyNDND0
Camas Municipal Water Sewer System
WA5310800		Clark County4.4123
Castle Rock Municipal Water
WA5311800		Cowlitz CountyNDND0
Cedar Grove Mobile Park
WA5336836		Clallam CountyNDND0
Cedar River Water & Sewer District
WA5341800		King CountyNDND1
Centralia Public Works - Water
WA5312200		Lewis CountyND5.82
Chehalis Water Department
WA5312250		Lewis CountyNDND0
Chelan Co PUD 1
WA5312284		Chelan CountyNDND0
Chelan Water Dept City Of
WA5312300		Chelan CountyNDND0
Cheney City Of
WA5312400		Spokane CountyNDND0
Clark Public Utilities
WA5313333		Clark County88.45
Coal Creek Utility District
WA5341750		King CountyNDND0
Colfax Water Department City Of
WA5314000		Whitman CountyNDND0
College Place Water Dept
WA5314050		Walla Walla CountyNDND0
Columbia Valley Water District
WA5366110		Whatcom CountyNDND0
Colville Water Department
WA5314200		Stevens CountyNDND0
Connell City Of
WA5314600		Franklin CountyNDND0
Consolidated Irrig Dist 19 System 1
WA5310220		Spokane CountyNDND0
Consolidated Irrig Dist 19 System 2
WA5310221		Spokane CountyNDND0
Consolidated Support Services
WA5321850		Spokane CountyNDND0
Coupeville Town Of
WA5315550		Island County9.8ND7
Covington Water District
WA5341650		King CountyND8.65
Crescent Water Assn
WA5316020		Clallam CountyNDND0
Cross Valley Water District
WA5316270		Snohomish CountyNDND3
Crystal Mountain Inc
WA5316400		Pierce CountyNDND0
Deer Park City Of
WA5318500		Spokane CountyND7.53
Dungeness Meadows
WA5320445		Clallam CountyNDND0
Dupont Water System City Of
WA5320500		Pierce CountyNDND0
Duvall City Of
WA5320750		King CountyNDND0
East Spokane Water Dist 1
WA5321650		Spokane CountyND5.51
East Wenatchee Water District
WA5321800		Douglas CountyNDND0
Eastern Washington University
WA5321900		Spokane CountyNDND0
Eastsound Water Users Association
WA5322170		San Juan CountyNDND0
Eatonville Water Dept
WA5322300		Pierce CountyNDND0
Edmonds City Of
WA5322500		Snohomish CountyNDND0
Ellensburg Water Dept
WA5322950		Kittitas CountyNDND0
Elma, City Of
WA5323100		Grays Harbor CountyNDND0
Emerald Lake
WA5323294		Mason CountyNDND0
Energy Dept Of/200W
WA5300100		Benton CountyNDND0
Enumclaw Water Department
WA5323600		King CountyNDND0
Ephrata Water Department
WA5323650		Grant CountyNDND0
Everett Public Works Dept. City Of
WA5324050		Snohomish CountyNDND0
Everson City Of
WA5324200		Whatcom CountyNDND0
Fairchild Air Force Base
WA5324350		Spokane CountyND7.95
Ferndale WA
WA5324850		Whatcom CountyNDND0
Fife Dept of Public Works
WA5325050		Pierce CountyNDND2
Fircrest City Of
WA5325150		Pierce CountyNDND1
Firgrove Mutual Inc
WA5325200		Pierce County4.48.63
Forks Municipal Water Dept
WA5326000		Clallam CountyNDND0
Friday Harbor Town Of
WA5326595		San Juan CountyNDND0
Fruitland Mutual Water Company
WA5326800		Pierce County4ND4
Gig Harbor Water Dept
WA5327600		Pierce CountyNDND0
Gold Bar City Of
WA5328300		Snohomish CountyNDND0
Goldendale City Of
WA5328450		Klickitat CountyNDND0
Grandview City Of
WA5328970		Yakima CountyNDND0
Granger Water Department
WA5329000		Yakima CountyNDND0
Granite Falls City Of
WA5329050		Snohomish CountyNDND0
Grays Harbor Co Water Dist 2
WA5329250		Grays Harbor CountyNDND0
Harrington City Of
WA5331450		Lincoln CountyNDND0
Heights Water
WA5332300		King CountyNDND0
Hi Valley View
WA5300431		Yakima CountyNDND0
Highline Water District
WA5340650		King CountyNDND0
Hoquiam Water Department
WA5334350		Grays Harbor CountyNDND0
Horizons West
WA5334375		Kitsap CountyNDND1
Irvin Water District #6
WA5336050		Spokane CountyNDND1
Issaquah Water System
WA5336350		King CountyNDND0
JBLM Lewis
WA5326050		Pierce County6.811.15
JBLM Mcchord Field
WA5352200		Pierce CountyND5.32
Kalama City Of
WA5337550		Cowlitz CountyNDND0
Kelso City Of
WA5338000		Cowlitz CountyNDND0
Kennewick City Of
WA5338100		Benton County4.611.56
Kent Water Department
WA5338150		King CountyNDND1
King County Water District #125
WA5341998		King CountyNDND0
King County Water District #20
WA5338950		King CountyNDND0
King County Water District #49
WA5339800		King CountyNDND0
King County Water District #54
WA5339950		King CountyNDND0
King County Water District 119
WA5341985		King CountyNDND0
King County Water District No 90
WA5341150		King CountyNDND0
Kirkland City Of
WA5342250		King CountyNDND0
Lacey Water Department
WA5343500		Thurston CountyNDND4
Lake Chelan Reclamation District
WA5343783		Chelan CountyNDND0
Lake Cushman System 5
WA5303529		Mason CountyNDND2
Lake Forest Park Water District
WA5340950		King CountyNDND0
Lake Meridian Water District
WA5341900		King CountyNDND0
Lakehaven Water and Sewer District
WA5341997		King CountyND4.16
Lakewood Water District
WA5345550		Pierce CountyND5.95
Liberty Lake Sewer & Water District
WA5347150		Spokane CountyNDND1
Long Beach Water Department
WA5348000		Pacific CountyNDND0
Longmire
WA53NP580		Pierce CountyNDND0
Longview Water Department
WA5348100		Cowlitz CountyNDND0
Lost Lake Property Owners Assn
WA5348345		Island CountyNDND0
Lwwsd - South Shore Water System
WA5395910		Whatcom CountyNDND0
Lynden Water Department
WA5349150		Whatcom CountyNDND0
Lynnwood City Of
WA5349270		Snohomish CountyNDND0
Manchester Water District
WA5350700		Kitsap CountyNDND0
Marysville Utilities
WA5351900		Snohomish CountyNDND0
Mattawa City Of
WA5352000		Grant CountyNDND0
Mccormick Woods
WA5340529		Kitsap CountyNDND0
Medical Lake City Of
WA5353400		Spokane CountyND4.42
Mercer Island City Of
WA5353640		King CountyNDND0
Milton City Of
WA5354950		Pierce CountyNDND4
Minterbrook
WA5354740		Pierce CountyNDND3
Model Irrigation Dist #18
WA5355550		Spokane County4.25.35
Modern Electric Water Co
WA5355600		Spokane CountyNDND0
Monroe Water System, WA
WA5355820		Snohomish CountyNDND0
Montesano City Of
WA5356000		Grays Harbor CountyNDND0
Moses Lake City Of
WA5356300		Grant CountyND52.25
Mountain View-Edgewood Water Co
WA5356820		Pierce CountyNDND1
Mountlake Terrace City Of
WA5357250		Snohomish CountyNDND0
Moxee Water Department
WA5357300		Yakima CountyNDND0
Mukilteo Water & Wastewater Distr
WA5357550		Snohomish CountyNDND0
Naches Town Of
WA5358100		Yakima CountyNDND0
Naval Air Station/Whidbey Island
WA5303420		Island CountyNDND0
Naval Base Kitsap At Bangor
WA5302714		Kitsap CountyNDND0
Naval Base Kitsap At Bremerton
WA5303468		Kitsap CountyNDND0
Ne Sammamish Sewer & Water District
WA5375265		King CountyNDND0
Nob Hill Water Association
WA5359700		Yakima CountyNDND0
North Bainbridge Water Co
WA5359994		Kitsap CountyNDND0
North Beach Water
WA5363000		Pacific CountyNDND0
North Bend, City Of
WA5360100		King CountyNDND0
North City Water District
WA5339600		King CountyNDND0
North Peninsula
WA5305122		Kitsap CountyNDND0
North Perry Ave Water District
WA5360950		Kitsap CountyNDND0
Northshore Utility District
WA5340800		King CountyNDND0
Northwest Trek
WA5361990		Pierce CountyNDND0
Northwest Water Assoc. Inc.
WA5362000		Whatcom County4.7ND2
Oak Harbor City Of
WA5362650		Island CountyNDND0
Ocean Shores Water Dept
WA5363008		Grays Harbor CountyNDND0
Olympia City Of
WA5363450		Thurston County4.35.85
Olympic View Water & Sewer District
WA5363600		Snohomish CountyNDND0
Omak City Of
WA5363750		Okanogan CountyNDND1
Orchard Avenue Irrigation Dist 6
WA5364000		Spokane CountyNDND0
Orting City Of
WA5364500		Pierce CountyNDND0
Othello Water Department
WA5364850		Adams CountyNDND0
PUD #1 of Asotin County
WA5393343		Asotin CountyNDND0
Pacific, City Of
WA5365300		King CountyNDND1
Parkland Light & Water Company
WA5366200		Pierce County6.213.86
Parkview Terrace
WA5366215		Kitsap CountyNDND1
Pasadena Park Irr Dist 17
WA5366300		Spokane CountyNDND0
Pasco Water Department
WA5366400		Franklin CountyNDND0
Pattison
WA5366578		Thurston CountyNDND0
Peacock Hill
WA5366637		Pierce CountyNDND7
Point Evans
WA5368065		Pierce CountyNDND0
Port Angeles City Of
WA5368550		Clallam CountyNDND0
Port Angeles Composite
WA5343296		Clallam CountyNDND1
Port Orchard Water
WA5368900		Kitsap CountyNDND0
Port Townsend City Of
WA5369000		Jefferson CountyNDND0
Port of Seattle/Seatac Airport
WA5303182		King CountyNDND0
Poulsbo City Of
WA5369150		Kitsap CountyNDND0
Prosser City Of
WA5369750		Benton CountyNDND0
Pullman Water Department City Of
WA5369880		Whitman CountyNDND0
Puyallup City Of
WA5370050		Pierce CountyNDND1
Quimper
WA5305783		Jefferson CountyNDND1
Quincy Water Department City Of
WA5370450		Grant CountyNDND0
Quistorff
WA5370550		Pierce CountyND127
Raymond Water Department
WA5371500		Pacific CountyNDND0
Redmond Water System City Of
WA5371650		King CountyND52
Renton City Of
WA5371850		King CountyNDND1
Richland City Of
WA5372250		Benton County10.1178
Ridgefield Public Works
WA5372400		Clark CountyNDND0
Rogers Group Properties I LLC
WA5389470		King CountyNDND0
Sallal Water Association Inc
WA5375560		King CountyNDND0
Sammamish Plateau Water & Sewer
WA5340900		King CountyND11.16
Seabeck
WA5303134		Kitsap CountyNDND0
Seascape Water Association
WA5307095		Island CountyNDND0
Seattle Public Utilities
WA5377050		King CountyNDND0
Selah City Of
WA5377400		Yakima CountyNDND0
Sequim City Of
WA5377620		Clallam CountyNDND1
Seven Lakes Water Association
WA5377660		Snohomish CountyNDND0
Shelter Bay Community Inc
WA5378155		Skagit CountyNDND0
Shelton City Of
WA5378170		Mason CountyNDND0
Silver Lake Water & Sewer District
WA5379250		Snohomish CountyNDND0
Silverdale Water Dist 16
WA5379300		Kitsap CountyNDND0
Skagit County PUD 1 Judy Res
WA5379500		Skagit CountyNDND1
Skyway Water & Sewer
WA5338800		King CountyNDND0
Snake River Housing Water System
WA5300710		Walla Walla CountyNDND0
Sno PUD 1 - Lake Stevens
WA5380907		Snohomish CountyNDND0
Snohomish City Of
WA5380915		Snohomish CountyNDND0
Snoqualmie Pass Utility District
WA5381048		King CountyNDND0
Snoqualmie Water
WA5381080		King CountyNDND0
Soos Creek Water & Sewer District
WA5340100		King CountyNDND0
Southwood Water System
WA5382844		Pierce County6.28.96
Spanaway Water Company
WA5382850		Pierce County6.28.36
Spo Co Water Dist 3 Sys 2
WA5393351		Spokane CountyNDND0
Spo Co Water Dist 3 Sys 3
WA5393353		Spokane CountyNDND0
Spo Co Water Dist 3 Sys 4
WA5393354		Spokane CountyNDND0
Spokane Business & Industrial Park
WA5383027		Spokane CountyNDND0
Spokane City Of
WA5383100		Spokane CountyND6.14
Stanwood Water Dept City Of
WA5383650		Snohomish CountyNDND0
Steilacoom Town Of
WA5384000		Pierce CountyNDND0
Stevens Co PUD - Suncrest
WA5385202		Stevens CountyNDND2
Stevens Co PUD - Valley
WA5305520		Stevens CountyNDND0
Stevens Pass Water System
WA5384245		King CountyNDND0
Sultan Water Department
WA5384770		Snohomish CountyNDND0
Summit Water & Supply Co
WA5385050		Pierce CountyNDND1
Sumner City Of
WA5385120		Pierce CountyNDND0
Sunnyside City Of
WA5385400		Yakima CountyNDND0
Suquamish
WA5386400		Kitsap CountyNDND0
Tacoma Water Division City Of
WA5386800		Pierce CountyNDND2
Tanglewilde-Thompson Place 600
WA5304397		Thurston CountyNDND0
Tenino City Of
WA5387400		Thurston CountyNDND0
Toppenish Water Department
WA5388850		Yakima CountyNDND0
Trentwood Irrigation District 3
WA5389250		Spokane County5.1125
Tukwila Water Department
WA5389500		King CountyNDND0
Tumwater City Of
WA5389700		Thurston CountyNDND1
Union Gap Water
WA5390250		Yakima CountyNDND0
Union Hill Water Association Inc
WA5390260		King CountyNDND0
Vancouver City Of
WA5391200		Clark County11.518.67
Vera Water & Power
WA5391450		Spokane CountyNDND0
Vinland
WA5391923		Kitsap CountyNDND0
Walla Walla Water Division
WA5392500		Walla Walla CountyNDND0
Wapato Waterworks
WA5392800		Yakima CountyNDND0
Warden City Of
WA5392850		Grant CountyNDND0
Washington State University
WA5393200		Whitman CountyNDND0
Washougal City Of
WA5393400		Clark CountyND7.93
Water District 19
WA5338900		King CountyNDND0
Wenatchee City Of
WA5394350		Chelan CountyNDND0
West Richland City Of
WA5394900		Benton CountyNDND0
West Sequim Bay Inc
WA5354192		Clallam CountyNDND0
West Sound Utility District #1
WA5302600		Kitsap County5.7ND4
Westport Water Department
WA5395300		Grays Harbor CountyNDND0
Whatcom County Water Dist 13
WA5395914		Whatcom CountyNDND0
White Salmon City Of
WA5396350		Klickitat CountyNDND0
Whitworth Water District 2
WA5396601		Spokane CountyND4.64
Woodinville Water District
WA5341600		King CountyNDND0
Woodland City Of
WA5398200		Cowlitz CountyNDND1
Yak Co - Terrace Heights
WA5306029		Yakima CountyNDND0
Yakima Water Division City Of
WA5399150		Yakima CountyNDND0
Yelm City Of
WA5399350		Thurston CountyNDND0

ND = not detected (below the 4 ppt UCMR 5 reporting level). Values are the highest single sample result, not an annual average.

Source: EPA UCMR 5 final occurrence data (EPA page last updated 2026-08-28; samples collected January 2023 – December 2025) ↗.

PFAS disclaimer: PFAS results are copied from EPA's UCMR 5 dataset and describe samples taken at a public water system's entry points between 2023 and 2025, not water at any specific address. Levels may have changed since sampling (for example, after new treatment). “Not detected” means below EPA's UCMR 5 minimum reporting level, not zero. This is not a compliance determination or a water test. Contact your water utility for current information.