Results from entry points (water leaving treatment, not household taps) of public water systems sampled under EPA's Fifth Unregulated Contaminant Monitoring Rule. Click a county to see every water system serving it, or turn on service areas and click a location to see the systems that serve that spot.
254 of the 2,771 public water systems listed for Washington were sampled. Sorted by the highest single result relative to EPA's 2024 limits. Each name links to a page with all of that system's results. All 2,771 Washington systems, including those not tested · Download all Washington results (CSV, gzip)
| System | PWSID | City | Population | PFOA (ppt) | PFOS (ppt) | HI | Highest single result |
|---|---|---|---|---|---|---|---|
| Artondale | WA5303160 | Tacoma | 5,828 | 6.3 | 153.6 | 5.595 | PFOS ≥ 3 × its limit |
| Moses Lake City Of | WA5356300 | Moses Lake | 32,428 | <MRL | 52.2 | 5.412 | PFOS ≥ 3 × its limit |
| Vancouver City Of | WA5391200 | Vancouver | 373,047 | 11.5 | 18.6 | 0.662 | PFOS ≥ 3 × its limit |
| Quistorff | WA5370550 | Tacoma | 1,113 | <MRL | 12 | 4.418 | Hazard Index ≥ 3 × its limit |
| Richland City Of | WA5372250 | Richland | 106,499 | 10.1 | 17 | 0.543 | PFOS ≥ 3 × its limit |
| Parkland Light & Water Company | WA5366200 | Tacoma | 33,775 | 6.2 | 13.8 | 0.473 | PFOS ≥ 3 × its limit |
| Camas Municipal Water Sewer System | WA5310800 | Camas | 31,794 | 4.4 | 12 | 0.002 | PFOS ≥ 3 × its limit |
| Trentwood Irrigation District 3 | WA5389250 | Spokane | 4,228 | 5.1 | 12 | 0.002 | PFOS ≥ 3 × its limit |
| Kennewick City Of | WA5338100 | Kennewick | 118,164 | 4.6 | 11.5 | 1.063 | PFOS 1–3 × its limit |
| Jblm Lewis | WA5326050 | Joint Base Lewis-Mcchord | 35,414 | 6.8 | 11.1 | 0.882 | PFOS 1–3 × its limit |
| Sammamish Plateau Water & Sewer | WA5340900 | Sammamish | 79,362 | <MRL | 11.1 | 1.654 | PFOS 1–3 × its limit |
| Coupeville Town Of | WA5315550 | Coupeville | 4,142 | 9.8 | <MRL | 0.383 | PFOA 1–3 × its limit |
| Southwood | WA5382844 | Tacoma | 64,155 | 6.2 | 8.9 | 0.003 | PFOS 1–3 × its limit |
| Benton City Water | WA5305800 | Benton City | 5,626 | <MRL | 8.7 | 1.432 | PFOS 1–3 × its limit |
| Covington Water District | WA5341650 | Kent | 56,172 | <MRL | 8.6 | 0.756 | PFOS 1–3 × its limit |
| Firgrove Mutual Inc | WA5325200 | Puyallup | 36,168 | 4.4 | 8.6 | 0.003 | PFOS 1–3 × its limit |
| Clark Public Utilities | WA5313333 | Vancouver | 153,526 | 8 | 8.4 | 0.532 | PFOS 1–3 × its limit |
| Spanaway Water Company | WA5382850 | Spanaway | 34,506 | 6.2 | 8.3 | 0.373 | PFOS 1–3 × its limit |
| Fairchild Air Force Base | WA5324350 | Fairchild Afb | 9,544 | <MRL | 7.9 | 1.702 | PFOS 1–3 × its limit |
| Washougal City Of | WA5393400 | Washougal | 21,441 | <MRL | 7.9 | 0.002 | PFOS 1–3 × its limit |
| Deer Park City Of | WA5318500 | Deer Park | 5,435 | <MRL | 7.5 | 0.43 | PFOS 1–3 × its limit |
| Spokane City Of | WA5383100 | Spokane | 346,138 | <MRL | 6.1 | 0.002 | PFOS 1–3 × its limit |
| Peacock Hill | WA5366637 | Tacoma | 7,401 | <MRL | <MRL | 1.498 | Hazard Index 1–3 × its limit |
| Lakewood Water District | WA5345550 | Lakewood | 82,425 | <MRL | 5.9 | 0.562 | PFOS 1–3 × its limit |
| Centralia Public Works - Water | WA5312200 | Centralia | 28,164 | <MRL | 5.8 | 0.002 | PFOS 1–3 × its limit |
| Olympia City Of | WA5363450 | Olympia | 126,966 | 4.3 | 5.8 | 0.002 | PFOS 1–3 × its limit |
| West Sound Utility District #1 | WA5302600 | Port Orchard | 28,930 | 5.7 | <MRL | 0.8 | PFOA 1–3 × its limit |
| East Spokane Water Dist 1 | WA5321650 | Spokane Valley | 4,285 | <MRL | 5.5 | 0 | PFOS 1–3 × its limit |
| Jblm Mcchord Field | WA5352200 | Joint Base Lewis-Mcchord | 7,290 | <MRL | 5.3 | 0.8 | PFOS 1–3 × its limit |
| Model Irrigation Dist #18 | WA5355550 | Spokane | 7,903 | 4.2 | 5.3 | 0.002 | PFOS 1–3 × its limit |
| Redmond Water System City Of | WA5371650 | Redmond | 163,335 | <MRL | 5 | 0.003 | PFOS 1–3 × its limit |
| Northwest Water Assoc. Inc. | WA5362000 | Lynden | 400 | 4.7 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Whitworth Water District 2 | WA5396601 | Mead | 26,883 | <MRL | 4.6 | 0.003 | PFOS 1–3 × its limit |
| Medical Lake City Of | WA5353400 | Medical Lake | 4,982 | <MRL | 4.4 | 0.53 | PFOS 1–3 × its limit |
| Lakehaven Water And Sewer District | WA5341997 | Federal Way | 148,809 | <MRL | 4.1 | 0.58 | PFOS 1–3 × its limit |
| Fruitland Mutual Water Company | WA5326800 | Puyallup | 15,313 | 4 | <MRL | 0.003 | PFOA 1–3 × its limit |
| Tacoma Water Division City Of | WA5386800 | Tacoma | 446,245 | <MRL | <MRL | 0.51 | Hazard Index below its limit |
| Fife Dept Of Public Works | WA5325050 | Fife | 29,091 | <MRL | <MRL | 0.502 | Hazard Index below its limit |
| Arlington City Of | WA5302950 | Arlington | 29,508 | <MRL | <MRL | 0.49 | Hazard Index below its limit |
| Airway Heights City Of | WA5300650 | Airway | 9,489 | <MRL | <MRL | 0.32 | Hazard Index below its limit |
| Lacey Water Department | WA5343500 | Lacey | 105,178 | <MRL | <MRL | 0.31 | Hazard Index below its limit |
| Cross Valley Water District | WA5316270 | Snohomish | 24,695 | <MRL | <MRL | 0.005 | Hazard Index below its limit |
| Pacific City Of | WA5365300 | Othello | 7,925 | <MRL | <MRL | 0.004 | Hazard Index below its limit |
| Fircrest City Of | WA5325150 | Fircrest | 7,927 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Parkview Terrace | WA5366215 | Tacoma | 3,730 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Sequim City Of | WA5377620 | Sequim | 14,293 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Tumwater City Of | WA5389700 | Tumwater | 51,924 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Auburn City Of | WA5303350 | Auburn | 107,655 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Bonney Lake Water Department City | WA5307650 | Buckley | 43,371 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Bremerton City Of | WA5308200 | Bremerton | 72,951 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Kent Water Department | WA5338150 | Kent | 166,421 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Liberty Lake Sewer & Water District | WA5347150 | Liberty Lake | 14,500 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Milton City Of | WA5354950 | Milton | 8,078 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Minterbrook | WA5354740 | Tacoma | 5,083 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Mountain View-Edgewood Water Co | WA5356820 | Edgewood | 9,680 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Puyallup City Of | WA5370050 | Puyallup | 94,520 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Quimper | WA5305783 | Port Townsend | 14,548 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Renton City Of | WA5371850 | Renton | 108,091 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Cedar River Water & Sewer District | WA5341800 | Maple Valley | 28,671 | <MRL | <MRL | 0 | Other PFAS detected |
| Horizons West | WA5334375 | Tacoma | 3,454 | <MRL | <MRL | 0 | Other PFAS detected |
| Irvin Water District #6 | WA5336050 | Spokane | 4,150 | <MRL | <MRL | 0 | Other PFAS detected |
| Lake Cushman System 5 | WA5303529 | Hoodsport | 3,675 | <MRL | <MRL | 0 | Other PFAS detected |
| Omak City Of | WA5363750 | Omak | 4,940 | <MRL | <MRL | 0 | Other PFAS detected |
| Port Angeles Composite | WA5343296 | Carlsborg | 8,872 | <MRL | <MRL | 0 | Other PFAS detected |
| Skagit County Pud 1 Judy Res | WA5379500 | Mount Vernon | 111,415 | <MRL | <MRL | 0 | Other PFAS detected |
| Stevens Co Pud - Suncrest | WA5385202 | Loon Lake | 7,484 | <MRL | <MRL | 0 | Other PFAS detected |
| Summit Water & Supply Co | WA5385050 | Tacoma | 19,125 | <MRL | <MRL | 0 | Other PFAS detected |
| Woodland City Of | WA5398200 | Woodland | 10,640 | <MRL | <MRL | 0 | Other PFAS detected |
| Aberdeen City Of | WA5300050 | Aberdeen | 22,867 | <MRL | <MRL | 0 | No PFAS detected |
| Alderwood Water District | WA5301300 | Lynnwood | 245,715 | <MRL | <MRL | 0 | No PFAS detected |
| Anacortes City Of | WA5302200 | Mount Vernon | 25,109 | <MRL | <MRL | 0 | No PFAS detected |
| Bainbridge Island City Of | WA5397650 | Bainbridge Island | 13,491 | <MRL | <MRL | 0 | No PFAS detected |
| Battle Ground Water Dept City Of | WA5304700 | Battle Ground | 30,237 | <MRL | <MRL | 0 | No PFAS detected |
| Bayshore | WA5304900 | Union | 130 | <MRL | <MRL | 0 | No PFAS detected |
| Beacon Hill Water & Sewer District | WA5315650 | Kelso | 11,969 | <MRL | <MRL | 0 | No PFAS detected |
| Bellevue City Of | WA5305575 | Bellevue | 321,349 | <MRL | <MRL | 0 | No PFAS detected |
| Bellingham-Water Division City Of | WA5305600 | Bellingham | 141,127 | <MRL | <MRL | 0 | No PFAS detected |
| Birch Bay Water & Sewer District | WA5395904 | Birch Bay | 9,046 | <MRL | <MRL | 0 | No PFAS detected |
| Blaine City Of | WA5307300 | Blaine | 6,800 | <MRL | <MRL | 0 | No PFAS detected |
| Bothell Water City Of | WA5307900 | Bothell | 33,643 | <MRL | <MRL | 0 | No PFAS detected |
| Buckley Water | WA5309000 | Buckley | 7,842 | <MRL | <MRL | 0 | No PFAS detected |
| Castle Rock Municipal Water | WA5311800 | Castle Rock | 4,367 | <MRL | <MRL | 0 | No PFAS detected |
| Cedar Grove Mobile Park | WA5336836 | Sequim | 40 | <MRL | <MRL | 0 | No PFAS detected |
| Chehalis Water Department | WA5312250 | Chehalis | 11,718 | <MRL | <MRL | 0 | No PFAS detected |
| Chelan Co Pud 1 | WA5312284 | Wenatchee | 16,190 | <MRL | <MRL | 0 | No PFAS detected |
| Chelan Water Dept City Of | WA5312300 | Chelan | 9,425 | <MRL | <MRL | 0 | No PFAS detected |
| Cheney City Of | WA5312400 | Cheney | 16,954 | <MRL | <MRL | 0 | No PFAS detected |
| Coal Creek Utility District | WA5341750 | Newcastle | 15,989 | <MRL | <MRL | 0 | No PFAS detected |
| Colfax Water Department City Of | WA5314000 | Colfax | 3,507 | <MRL | <MRL | 0 | No PFAS detected |
| College Place Water Dept | WA5314050 | College Place | 8,147 | <MRL | <MRL | 0 | No PFAS detected |
| Columbia Valley Water District | WA5366110 | Maple Falls | 2,648 | <MRL | <MRL | 0 | No PFAS detected |
| Colville Water Department | WA5314200 | Colville | 4,945 | <MRL | <MRL | 0 | No PFAS detected |
| Connell City Of | WA5314600 | Connell | 5,150 | <MRL | <MRL | 0 | No PFAS detected |
| Consolidated Irrig Dist 19 System 1 | WA5310220 | Greenacres | 9,434 | <MRL | <MRL | 0 | No PFAS detected |
| Consolidated Irrig Dist 19 System 2 | WA5310221 | Greenacres | 21,220 | <MRL | <MRL | 0 | No PFAS detected |
| Consolidated Support Services | WA5321850 | Medical Lake | 569 | <MRL | <MRL | 0 | No PFAS detected |
| Crescent Water Assn | WA5316020 | Joyce | 2,360 | <MRL | <MRL | 0 | No PFAS detected |
| Crystal Mountain Inc | WA5316400 | Raymond | 4,154 | <MRL | <MRL | 0 | No PFAS detected |
| Dungeness Meadows | WA5320445 | Sequim | 488 | <MRL | <MRL | 0 | No PFAS detected |
| Dupont Water System City Of | WA5320500 | Dupont | 13,141 | <MRL | <MRL | 0 | No PFAS detected |
| Duvall City Of | WA5320750 | Duvall | 11,050 | <MRL | <MRL | 0 | No PFAS detected |
| East Wenatchee Water District | WA5321800 | East Wenatchee | 26,519 | <MRL | <MRL | 0 | No PFAS detected |
| Eastern Washington University | WA5321900 | Cheney | 17,108 | <MRL | <MRL | 0 | No PFAS detected |
| Eastsound Water Users Association | WA5322170 | Eastsound | 3,711 | <MRL | <MRL | 0 | No PFAS detected |
| Eatonville Water Dept | WA5322300 | Eatonville | 3,945 | <MRL | <MRL | 0 | No PFAS detected |
| Edmonds City Of | WA5322500 | Edmonds | 34,065 | <MRL | <MRL | 0 | No PFAS detected |
| Ellensburg Water Dept | WA5322950 | Ellensburg | 20,900 | <MRL | <MRL | 0 | No PFAS detected |
| Elma City Of | WA5323100 | Elma | 6,638 | <MRL | <MRL | 0 | No PFAS detected |
| Emerald Lake | WA5323294 | Shelton | 329 | <MRL | <MRL | 0 | No PFAS detected |
| Energy Dept Of/200W | WA5300100 | Richland | 6,351 | <MRL | <MRL | 0 | No PFAS detected |
| Enumclaw Water Department | WA5323600 | Enumclaw | 23,276 | <MRL | <MRL | 0 | No PFAS detected |
| Ephrata Water Department | WA5323650 | Ephrata | 8,718 | <MRL | <MRL | 0 | No PFAS detected |
| Everett Public Works Dept. City Of | WA5324050 | Everett | 215,774 | <MRL | <MRL | 0 | No PFAS detected |
| Everson City Of | WA5324200 | Everson | 3,893 | <MRL | <MRL | 0 | No PFAS detected |
| Ferndale | WA5324850 | Ferndale | 19,305 | <MRL | <MRL | 0 | No PFAS detected |
| Forks Municipal Water Dept | WA5326000 | Forks | 3,468 | <MRL | <MRL | 0 | No PFAS detected |
| Friday Harbor Town Of | WA5326595 | Friday Harbor | 3,543 | <MRL | <MRL | 0 | No PFAS detected |
| Gig Harbor Water Dept | WA5327600 | Gig Harbor | 16,510 | <MRL | <MRL | 0 | No PFAS detected |
| Gold Bar City Of | WA5328300 | Goldbar | 2,745 | <MRL | <MRL | 0 | No PFAS detected |
| Goldendale City Of | WA5328450 | Goldendale | 4,314 | <MRL | <MRL | 0 | No PFAS detected |
| Grandview City Of | WA5328970 | Grandview | 11,010 | <MRL | <MRL | 0 | No PFAS detected |
| Granger Water Department | WA5329000 | Granger | 3,993 | <MRL | <MRL | 0 | No PFAS detected |
| Granite Falls City Of | WA5329050 | Granite Falls | 5,349 | <MRL | <MRL | 0 | No PFAS detected |
| Grays Harbor Co Water Dist 2 | WA5329250 | Montesano | 5,112 | <MRL | <MRL | 0 | No PFAS detected |
| Harrington City Of | WA5331450 | Waverly | 650 | <MRL | <MRL | 0 | No PFAS detected |
| Heights Water | WA5332300 | Vashon | 2,051 | <MRL | <MRL | 0 | No PFAS detected |
| Hi Valley View | WA5300431 | Yakima | 67 | <MRL | <MRL | 0 | No PFAS detected |
| Highline Water District | WA5340650 | Kent | 100,170 | <MRL | <MRL | 0 | No PFAS detected |
| Hoquiam Water Department | WA5334350 | Hoquiam | 11,456 | <MRL | <MRL | 0 | No PFAS detected |
| Issaquah Water System | WA5336350 | Issaquah | 43,584 | <MRL | <MRL | 0 | No PFAS detected |
| Kalama City Of | WA5337550 | Kalama | 8,020 | <MRL | <MRL | 0 | No PFAS detected |
| Kelso City Of | WA5338000 | Kelso | 15,775 | <MRL | <MRL | 0 | No PFAS detected |
| King County Water District #125 | WA5341998 | Seattle | 21,904 | <MRL | <MRL | 0 | No PFAS detected |
| King County Water District #20 | WA5338950 | Seattle | 48,469 | <MRL | <MRL | 0 | No PFAS detected |
| King County Water District #49 | WA5339800 | Burien | 23,492 | <MRL | <MRL | 0 | No PFAS detected |
| King County Water District #54 | WA5339950 | Kent | 5,373 | <MRL | <MRL | 0 | No PFAS detected |
| King County Water District 119 | WA5341985 | Duvall | 3,800 | <MRL | <MRL | 0 | No PFAS detected |
| King County Water District No 90 | WA5341150 | Renton | 20,100 | <MRL | <MRL | 0 | No PFAS detected |
| Kirkland City Of | WA5342250 | Kirkland | 69,243 | <MRL | <MRL | 0 | No PFAS detected |
| Lake Chelan Reclamation District | WA5343783 | Manson | 6,798 | <MRL | <MRL | 0 | No PFAS detected |
| Lake Forest Park Water District | WA5340950 | Lake Forest Park | 3,171 | <MRL | <MRL | 0 | No PFAS detected |
| Lake Meridian Water District | WA5341900 | Kent | 24,231 | <MRL | <MRL | 0 | No PFAS detected |
| Long Beach Water Department | WA5348000 | Long Beach | 4,628 | <MRL | <MRL | 0 | No PFAS detected |
| Longmire | WA53NP580 | Ashford | 4,871 | <MRL | <MRL | 0 | No PFAS detected |
| Longview Water Department | WA5348100 | Longview | 57,617 | <MRL | <MRL | 0 | No PFAS detected |
| Lost Lake Property Owners Assn | WA5348345 | Coupeville | 736 | <MRL | <MRL | 0 | No PFAS detected |
| Lummi Tribal Water District | 105300002 | Bellingham | 3,699 | <MRL | <MRL | 0 | No PFAS detected |
| Lwwsd - South Shore Water System | WA5395910 | Bellingham | 10,028 | <MRL | <MRL | 0 | No PFAS detected |
| Lynden Water Department | WA5349150 | Lynden | 20,062 | <MRL | <MRL | 0 | No PFAS detected |
| Lynnwood City Of | WA5349270 | Lynnwood | 68,204 | <MRL | <MRL | 0 | No PFAS detected |
| Manchester Water District | WA5350700 | Manchester | 10,475 | <MRL | <MRL | 0 | No PFAS detected |
| Marysville Utilities | WA5351900 | Marysville | 88,582 | <MRL | <MRL | 0 | No PFAS detected |
| Mattawa City Of | WA5352000 | Mattawa | 5,370 | <MRL | <MRL | 0 | No PFAS detected |
| Mccormick Woods | WA5340529 | Port Orchard | 2,760 | <MRL | <MRL | 0 | No PFAS detected |
| Mercer Island City Of | WA5353640 | Mercer Island | 31,057 | <MRL | <MRL | 0 | No PFAS detected |
| Modern Electric Water Co | WA5355600 | Spokane | 18,487 | <MRL | <MRL | 0 | No PFAS detected |
| Monroe Water System | WA5355820 | Monroe | 23,467 | <MRL | <MRL | 0 | No PFAS detected |
| Montesano City Of | WA5356000 | Montesano | 6,204 | <MRL | <MRL | 0 | No PFAS detected |
| Mountlake Terrace City Of | WA5357250 | Mountlake Terrace | 26,402 | <MRL | <MRL | 0 | No PFAS detected |
| Moxee Water Department | WA5357300 | Moxee | 5,599 | <MRL | <MRL | 0 | No PFAS detected |
| Mt. Vista - Dungeness Golf Course | 105388889 | Sequim | 517 | <MRL | <MRL | 0 | No PFAS detected |
| Mukilteo Water & Wastewater Distr | WA5357550 | Mukilteo | 31,437 | <MRL | <MRL | 0 | No PFAS detected |
| Naches Town Of | WA5358100 | Naches | 3,512 | <MRL | <MRL | 0 | No PFAS detected |
| Naval Air Station/Whidbey Island | WA5303420 | Nas Whidbey Island | 16,595 | <MRL | <MRL | 0 | No PFAS detected |
| Naval Base Kitsap At Bangor | WA5302714 | Silverdale | 16,828 | <MRL | <MRL | 0 | No PFAS detected |
| Naval Base Kitsap At Bremerton | WA5303468 | Silverdale | 11,792 | <MRL | <MRL | 0 | No PFAS detected |
| Ne Sammamish Sewer & Water District | WA5375265 | Sammamish | 9,702 | <MRL | <MRL | 0 | No PFAS detected |
| Nob Hill Water Association | WA5359700 | Yakima | 38,050 | <MRL | <MRL | 0 | No PFAS detected |
| North Bainbridge Water Co | WA5359994 | Poulsbo | 5,490 | <MRL | <MRL | 0 | No PFAS detected |
| North Beach Water | WA5363000 | Ocean Park | 8,093 | <MRL | <MRL | 0 | No PFAS detected |
| North Bend City Of | WA5360100 | North Bend | 8,710 | <MRL | <MRL | 0 | No PFAS detected |
| North City Water District | WA5339600 | Shoreline | 32,847 | <MRL | <MRL | 0 | No PFAS detected |
| North Peninsula | WA5305122 | Poulsbo | 16,449 | <MRL | <MRL | 0 | No PFAS detected |
| North Perry Ave Water District | WA5360950 | Bremerton | 24,402 | <MRL | <MRL | 0 | No PFAS detected |
| Northshore Utility District | WA5340800 | Kenmore | 99,789 | <MRL | <MRL | 0 | No PFAS detected |
| Northwest Trek | WA5361990 | Eatonville | 1,283 | <MRL | <MRL | 0 | No PFAS detected |
| Oak Harbor City Of | WA5362650 | Oak Harbor | 23,675 | <MRL | <MRL | 0 | No PFAS detected |
| Ocean Shores Water Dept | WA5363008 | Hoquiam | 9,347 | <MRL | <MRL | 0 | No PFAS detected |
| Olympic View Water & Sewer District | WA5363600 | Edmonds | 17,784 | <MRL | <MRL | 0 | No PFAS detected |
| Orchard Avenue Irrigation Dist 6 | WA5364000 | Spokane | 4,330 | <MRL | <MRL | 0 | No PFAS detected |
| Orting City Of | WA5364500 | Orting | 10,332 | <MRL | <MRL | 0 | No PFAS detected |
| Othello Water Department | WA5364850 | Othello | 8,755 | <MRL | <MRL | 0 | No PFAS detected |
| Pasadena Park Irr Dist 17 | WA5366300 | Spokane | 6,269 | <MRL | <MRL | 0 | No PFAS detected |
| Pasco Water Department | WA5366400 | Pasco | 115,102 | <MRL | <MRL | 0 | No PFAS detected |
| Pattison 500 | WA5366578 | Lacey | 4,643 | <MRL | <MRL | 0 | No PFAS detected |
| Point Evans | WA5368065 | Tacoma | 5,211 | <MRL | <MRL | 0 | No PFAS detected |
| Port Angeles City Of | WA5368550 | Port Angeles | 28,067 | <MRL | <MRL | 0 | No PFAS detected |
| Port Of Seattle/Seatac Airport | WA5303182 | Seattle | 49,483 | <MRL | <MRL | 0 | No PFAS detected |
| Port Orchard Water Dept | WA5368900 | Port Orchard | 15,355 | <MRL | <MRL | 0 | No PFAS detected |
| Port Townsend City Of | WA5369000 | Port Townsend | 17,053 | <MRL | <MRL | 0 | No PFAS detected |
| Poulsbo City Of | WA5369150 | Poulsbo | 18,400 | <MRL | <MRL | 0 | No PFAS detected |
| Prosser City Of | WA5369750 | Prosser | 8,030 | <MRL | <MRL | 0 | No PFAS detected |
| Pud #1 Of Asotin County | WA5393343 | Clarkston | 21,930 | <MRL | <MRL | 0 | No PFAS detected |
| Pullman Water Department City Of | WA5369880 | Pullman | 31,315 | <MRL | <MRL | 0 | No PFAS detected |
| Quil Ceda Village | 105300116 | Tulalip | 30,000 | <MRL | <MRL | 0 | No PFAS detected |
| Quincy Water Department City Of | WA5370450 | Quincy | 8,415 | <MRL | <MRL | 0 | No PFAS detected |
| Raymond Water Department | WA5371500 | Raymond | 4,620 | <MRL | <MRL | 0 | No PFAS detected |
| Ridgefield Public Works | WA5372400 | Ridgefield | 21,225 | <MRL | <MRL | 0 | No PFAS detected |
| Rogers Group Properties I Llc | WA5389470 | North Bend | 570 | <MRL | <MRL | 0 | No PFAS detected |
| Sallal Water Association Inc | WA5375560 | North Bend | 6,600 | <MRL | <MRL | 0 | No PFAS detected |
| Seabeck | WA5303134 | Poulsbo | 610 | <MRL | <MRL | 0 | No PFAS detected |
| Seascape Water Association | WA5307095 | Stanwood | 28 | <MRL | <MRL | 0 | No PFAS detected |
| Seattle Public Utilities | WA5377050 | Seattle | 1,161,961 | <MRL | <MRL | 0 | No PFAS detected |
| Selah City Of | WA5377400 | Selah | 9,331 | <MRL | <MRL | 0 | No PFAS detected |
| Seven Lakes Water Association | WA5377660 | Stanwood | 5,823 | <MRL | <MRL | 0 | No PFAS detected |
| Shelter Bay Community Inc | WA5378155 | La Conner | 2,212 | <MRL | <MRL | 0 | No PFAS detected |
| Shelton City Of | WA5378170 | Shelton | 15,273 | <MRL | <MRL | 0 | No PFAS detected |
| Shoalwater Bay | 105300019 | Tokeland | 898 | <MRL | <MRL | 0 | No PFAS detected |
| Silver Lake Water & Sewer District | WA5379250 | Bothell | 65,033 | <MRL | <MRL | 0 | No PFAS detected |
| Silverdale Water Dist 16 | WA5379300 | Silverdale | 35,163 | <MRL | <MRL | 0 | No PFAS detected |
| Skyway Water & Sewer | WA5338800 | Seattle | 12,036 | <MRL | <MRL | 0 | No PFAS detected |
| Snake River Housing Water System | WA5300710 | Yakima | 3,036 | <MRL | <MRL | 0 | No PFAS detected |
| Sno Pud 1 - Lake Stevens | WA5380907 | Everett | 67,710 | <MRL | <MRL | 0 | No PFAS detected |
| Snohomish City Of | WA5380915 | Snohomish | 16,367 | <MRL | <MRL | 0 | No PFAS detected |
| Snoqualmie Pass Utility District | WA5381048 | Snoqualmie Pass | 5,832 | <MRL | <MRL | 0 | No PFAS detected |
| Snoqualmie Water | WA5381080 | Snoqualime | 20,222 | <MRL | <MRL | 0 | No PFAS detected |
| Soos Creek Water & Sewer District | WA5340100 | Renton | 74,172 | <MRL | <MRL | 0 | No PFAS detected |
| Spo Co Water Dist 3 Sys 1 | WA5393351 | Spokane | 19,035 | <MRL | <MRL | 0 | No PFAS detected |
| Spo Co Water Dist 3 Sys 3 | WA5393353 | Spokane | 3,768 | <MRL | <MRL | 0 | No PFAS detected |
| Spo Co Water Dist 3 Sys 4 | WA5393354 | Spokane | 6,233 | <MRL | <MRL | 0 | No PFAS detected |
| Spokane Business & Industrial Park | WA5383027 | Spokane | 5,000 | <MRL | <MRL | 0 | No PFAS detected |
| Stanwood Water Dept City Of | WA5383650 | Stanwood | 17,586 | <MRL | <MRL | 0 | No PFAS detected |
| Steilacoom Town Of | WA5384000 | Steilacoom | 8,545 | <MRL | <MRL | 0 | No PFAS detected |
| Stevens Co Pud - Valley | WA5305520 | Loon Lake | 550 | <MRL | <MRL | 0 | No PFAS detected |
| Stevens Pass Water System | WA5384245 | Leavenworth | 4,053 | <MRL | <MRL | 0 | No PFAS detected |
| Sultan Water Department | WA5384770 | Sultan | 8,424 | <MRL | <MRL | 0 | No PFAS detected |
| Sumner City Of | WA5385120 | Sumner | 16,438 | <MRL | <MRL | 0 | No PFAS detected |
| Sunnyside City Of | WA5385400 | Sunnyside | 17,194 | <MRL | <MRL | 0 | No PFAS detected |
| Suquamish | WA5386400 | Poulsbo | 4,203 | <MRL | <MRL | 0 | No PFAS detected |
| Swinomish Casino & Lodge | 105338108 | La Conner | 2,400 | <MRL | <MRL | 0 | No PFAS detected |
| Tanglewilde Thompson Place 600 | WA5304397 | Lacey | 7,900 | <MRL | <MRL | 0 | No PFAS detected |
| Tenino City Of | WA5387400 | Tenino | 3,336 | <MRL | <MRL | 0 | No PFAS detected |
| Toppenish Water Department | WA5388850 | Toppenish | 13,382 | <MRL | <MRL | 0 | No PFAS detected |
| Tukwila Water Department | WA5389500 | Tukwila | 36,298 | <MRL | <MRL | 0 | No PFAS detected |
| Tulalip Bay Water Dist #1 | 105300003 | Tulalip | 5,968 | <MRL | <MRL | 0 | No PFAS detected |
| Union Gap Water | WA5390250 | Union Gap | 6,433 | <MRL | <MRL | 0 | No PFAS detected |
| Union Hill Water Association Inc | WA5390260 | Redmond | 8,720 | <MRL | <MRL | 0 | No PFAS detected |
| Vera Water & Power | WA5391450 | Spokane Valley | 24,692 | <MRL | <MRL | 0 | No PFAS detected |
| Vinland | WA5391923 | Poulsbo | 4,801 | <MRL | <MRL | 0 | No PFAS detected |
| Walla Walla Water Division | WA5392500 | Walla Walla | 42,959 | <MRL | <MRL | 0 | No PFAS detected |
| Wapato Waterworks | WA5392800 | Wapato | 5,255 | <MRL | <MRL | 0 | No PFAS detected |
| Warden City Of | WA5392850 | Warden | 4,674 | <MRL | <MRL | 0 | No PFAS detected |
| Washington State University | WA5393200 | Pullman | 21,506 | <MRL | <MRL | 0 | No PFAS detected |
| Water District 19 | WA5338900 | Vashon | 5,335 | <MRL | <MRL | 0 | No PFAS detected |
| Wenatchee City Of | WA5394350 | Wenatchee | 43,690 | <MRL | <MRL | 0 | No PFAS detected |
| West Richland City Of | WA5394900 | West Richland | 21,231 | <MRL | <MRL | 0 | No PFAS detected |
| West Sequim Bay Inc | WA5354192 | Sequim | 2,759 | <MRL | <MRL | 0 | No PFAS detected |
| Westport Water Department | WA5395300 | Westport | 5,346 | <MRL | <MRL | 0 | No PFAS detected |
| Whatcom County Water Dist 13 | WA5395914 | Maple Falls | 795 | <MRL | <MRL | 0 | No PFAS detected |
| White Salmon City Of | WA5396350 | White Salmon | 4,077 | <MRL | <MRL | 0 | No PFAS detected |
| Woodinville Water District | WA5341600 | Woodinville | 66,699 | <MRL | <MRL | 0 | No PFAS detected |
| Yak Co - Terrace Heights | WA5306029 | Yakima | 8,410 | <MRL | <MRL | 0 | No PFAS detected |
| Yakima Water Division City Of | WA5399150 | Yakima | 112,858 | <MRL | <MRL | 0 | No PFAS detected |
| Yelm City Of | WA5399350 | Yelm | 17,355 | <MRL | <MRL | 0 | No PFAS detected |
Highest single result for each system; PFOA and PFOS in ppt (ng/L). Entry-point samples, not tap water; screening comparisons, not compliance determinations.