What is PFAS?
Water suppliers
PFAS value per supplier, 2023–2025. EPA limit — 4 ppt (0.004 µg/L) for PFOA and PFOS, set in 2024. Suppliers that detected PFOA or PFOS
are highlighted and listed first. “Not detected” means the contaminant was measured but
not found.
| Supplier | City | Population | PFAS (ug/L) |
|---|---|---|---|
| Artondale | Tacoma | 5,828 | 0.1536 µg/L |
| Moses Lake City of | Moses Lake | 32,428 | 0.0522 µg/L |
| Vancouver City of | Vancouver | 373,047 | 0.0186 µg/L |
| Richland City of | Richland | 106,499 | 0.0170 µg/L |
| Parkland Light & Water Company | Tacoma | 33,775 | 0.0138 µg/L |
| Camas Municipal Water Sewer System | Camas | 31,794 | 0.0120 µg/L |
| Trentwood Irrigation District 3 | Spokane | 4,228 | 0.0120 µg/L |
| Quistorff | Tacoma | 1,113 | 0.0120 µg/L |
| Kennewick City of | Kennewick | 118,164 | 0.0115 µg/L |
| Sammamish Plateau Water & Sewer | Sammamish | 79,362 | 0.0111 µg/L |
| Jblm Lewis | Joint Base Lewis-Mcchord | 35,414 | 0.0111 µg/L |
| Coupeville Town of | Coupeville | 4,142 | 0.0098 µg/L |
| Southwood | Tacoma | 64,155 | 0.0089 µg/L |
| Benton City Water | Benton City | 5,626 | 0.0087 µg/L |
| Covington Water District | Kent | 56,172 | 0.0086 µg/L |
| Firgrove Mutual Inc | Puyallup | 36,168 | 0.0086 µg/L |
| Clark Public Utilities | Vancouver | 153,526 | 0.0084 µg/L |
| Spanaway Water Company | Spanaway | 34,506 | 0.0083 µg/L |
| Washougal City of | Washougal | 21,441 | 0.0079 µg/L |
| Fairchild Air Force Base | Fairchild Afb | 9,544 | 0.0079 µg/L |
| Deer Park City of | Deer Park | 5,435 | 0.0075 µg/L |
| Spokane City of | Spokane | 346,138 | 0.0061 µg/L |
| Lakewood Water District | Lakewood | 82,425 | 0.0059 µg/L |
| Olympia City of | Olympia | 126,966 | 0.0058 µg/L |
| Centralia Public Works - Water | — | 28,164 | 0.0058 µg/L |
| West Sound Utility District #1 | Port Orchard | 28,930 | 0.0057 µg/L |
| East Spokane Water Dist 1 | Spokane Valley | 4,285 | 0.0055 µg/L |
| Jblm Mcchord Field | Joint Base Lewis-Mcchord | 7,290 | 0.0053 µg/L |
| Redmond Water System City of | Redmond | 163,335 | 0.0050 µg/L |
| Whitworth Water District 2 | Mead | 26,883 | 0.0046 µg/L |
| Medical Lake City of | Medical Lake | 4,982 | 0.0044 µg/L |
| Model Irrigation Dist #18 | Spokane | 7,903 | 0.0042 µg/L |
| Lakehaven Water and Sewer District | — | 148,809 | 0.0041 µg/L |
| Fruitland Mutual Water Company | Puyallup | 15,313 | 0.0040 µg/L |
| Seattle Public Utilities | Seattle | 1,161,961 | Not detected |
| Tacoma Water Division City of | Tacoma | 446,170 | Not detected |
| Bellevue City of | Bellevue | 321,349 | Not detected |
| Alderwood Water District | Lynnwood | 245,715 | Not detected |
| Everett Public Works Dept. City of | Everett | 215,774 | Not detected |
| Kent Water Department | Kent | 166,421 | Not detected |
| Bellingham-Water Division City of | Bellingham | 141,127 | Not detected |
| Pasco Water Department | Pasco | 115,102 | Not detected |
| Yakima Water Division City of | Yakima | 112,858 | Not detected |
| Skagit County Pud 1 Judy Res | Mount Vernon | 111,415 | Not detected |
| Renton City of | Renton | 108,091 | Not detected |
| Auburn City of | Auburn | 107,655 | Not detected |
| Lacey Water Department | Lacey | 105,178 | Not detected |
| Highline Water District | Kent | 100,170 | Not detected |
| Northshore Utility District | Kenmore | 99,789 | Not detected |
| Puyallup City of | Puyallup | 94,520 | Not detected |
| Marysville Utilities | Marysville | 88,582 | Not detected |
| Soos Creek Water & Sewer District | Renton | 74,172 | Not detected |
| Bremerton City of | Bremerton | 72,951 | Not detected |
| Kirkland City of | Kirkland | 69,243 | Not detected |
| Lynnwood City of | Lynnwood | 68,204 | Not detected |
| Sno Pud 1 - Lake Stevens | Everett | 67,710 | Not detected |
| Woodinville Water District | — | 66,699 | Not detected |
| Silver Lake Water & Sewer District | Bothell | 65,033 | Not detected |
| Longview Water Department | Longview | 57,617 | Not detected |
| Tumwater City of | Tumwater | 51,802 | Not detected |
| King County Water District #20 | Seattle | 48,469 | Not detected |
| Wenatchee City of | Wenatchee | 43,690 | Not detected |
| Issaquah Water System | Issaquah | 43,584 | Not detected |
| Bonney Lake Water Department City | Buckley | 43,371 | Not detected |
| Walla Walla Water Division | Walla Walla | 42,959 | Not detected |
| Nob Hill Water Association | Yakima | 38,050 | Not detected |
| Tukwila Water Department | Tukwila | 36,298 | Not detected |
| Silverdale Water Dist 16 | Silverdale | 35,163 | Not detected |
| Edmonds City of | Edmonds | 34,065 | Not detected |
| Bothell Water City of | — | 33,643 | Not detected |
| North City Water District | Shoreline | 32,847 | Not detected |
| Mukilteo Water & Wastewater Distr | — | 31,437 | Not detected |
| Pullman Water Department City of | Pullman | 31,315 | Not detected |
| Mercer Island City of | Mercer Island | 31,057 | Not detected |
| Arlington City of | Arlington | 29,508 | Not detected |
| Fife Dept of Public Works | Fife | 29,091 | Not detected |
| Cedar River Water & Sewer District | Maple Valley | 28,671 | Not detected |
| Port Angeles City of | Port Angeles | 28,067 | Not detected |
| East Wenatchee Water District | — | 26,519 | Not detected |
| Mountlake Terrace City of | — | 26,402 | Not detected |
| Anacortes City of | Mount Vernon | 25,109 | Not detected |
| Cross Valley Water District | Snohomish | 24,695 | Not detected |
| Vera Water & Power | Spokane Valley | 24,692 | Not detected |
| North Perry Ave Water District | Bremerton | 24,402 | Not detected |
| Lake Meridian Water District | Kent | 24,231 | Not detected |
| Oak Harbor City of | — | 23,675 | Not detected |
| King County Water District #49 | Burien | 23,492 | Not detected |
| Monroe Water System | Monroe | 23,467 | Not detected |
| Enumclaw Water Department | Enumclaw | 23,276 | Not detected |
| Aberdeen City of | Aberdeen | 22,867 | Not detected |
| Pud #1 of Asotin County | Clarkston | 21,930 | Not detected |
| King County Water District #125 | Seattle | 21,904 | Not detected |
| Washington State University | Pullman | 21,506 | Not detected |
| West Richland City of | West Richland | 21,231 | Not detected |
| Ridgefield Public Works | Ridgefield | 21,225 | Not detected |
| Consolidated Irrig Dist 19 System 2 | Greenacres | 21,220 | Not detected |
| Ellensburg Water Dept | Ellensburg | 20,900 | Not detected |
| Snoqualmie Water | Snoqualime | 20,222 | Not detected |
| King County Water District No 90 | Renton | 20,100 | Not detected |
| Lynden Water Department | Lynden | 20,062 | Not detected |