Washington PFAS compliance
PFAS contamination data for 500 water systems in Washington, serving 9,381,084 people.
Total systems
500
Exceed MCL
33
At risk
1
Compliant
202
Settlement eligible
93
Washington PFAS regulatory overview
State standards
State standardsWashington has its own PFAS standards
PFOA MCL: 10 ppt(EPA: 4 ppt)
PFOS MCL: 15 ppt(EPA: 4 ppt)
WA state action levels: PFOA 10 ppt, PFOS 15 ppt, PFHxS 65 ppt, PFNA 9 ppt, PFBS 345 ppt. CAS Phase 5 PFAS actions ongoing.
Regulatory agency
Washington state has action levels and is actively investigating PFAS contamination. Significant contamination near Fairchild AFB (cleanup pushed to 2032) and Whidbey Island NAS (pushed to 2034).
Get weekly PFAS compliance alerts for Washington
Water systems
| System | City | Population | PFOA (ppt) | PFOS (ppt) | Status |
|---|---|---|---|---|---|
| SEATTLE PUBLIC UTILITIES WA5377050 | Seattle | 1,091,904 | — | — | Compliant |
| TACOMA WATER DIVISION CITY OF WA5386800 | TACOMA | 448,771 | — | — | Compliant |
| VANCOUVER CITY OF WA5391200 | Vancouver | 373,047 | 11.5 | 18.6 | Exceeds |
| SPOKANE CITY OF WA5383100 | Spokane | 343,167 | — | 6.1 | Exceeds |
| BELLEVUE CITY OF WA5305575 | Bellevue | 317,330 | — | — | Compliant |
| EVERETT PUBLIC WORKS DEPT. CITY OF WA5324050 | Everett | 215,774 | — | — | Compliant |
| ALDERWOOD WATER DISTRICT WA5301300 | Lynnwood | 200,000 | — | — | Compliant |
| KENT WATER DEPARTMENT WA5338150 | Kent | 166,421 | — | — | Compliant |
| REDMOND WATER SYSTEM CITY OF WA5371650 | Redmond | 163,335 | — | 5 | Exceeds |
| BELLINGHAM-WATER DIVISION CITY OF WA5305600 | Bellingham | 139,912 | — | — | Compliant |
| LAKEHAVEN WATER AND SEWER DISTRICT WA5341997 | FEDERAL WAY | 118,273 | — | 4.1 | Exceeds |
| CLARK PUBLIC UTILITIES WA5313333 | VANCOUVER | 116,876 | 8 | 8.4 | Exceeds |
| PASCO WATER DEPARTMENT WA5366400 | Pasco | 116,342 | — | — | Compliant |
| HIGHLINE WATER DISTRICT WA5340650 | Kent | 115,950 | — | — | Compliant |
| KENNEWICK CITY OF WA5338100 | Kennewick | 114,468 | 4.6 | 11.5 | Exceeds |
| OLYMPIA CITY OF WA5363450 | OLYMPIA | 113,584 | 4.3 | 5.8 | Exceeds |
| Auburn City of WA5303350 | Auburn | 113,095 | — | — | Compliant |
| YAKIMA WATER DIVISION CITY OF WA5399150 | Yakima | 112,858 | — | — | Compliant |
| SKAGIT COUNTY PUD 1 JUDY RES WA5379500 | Mount Vernon | 111,415 | — | — | Compliant |
| RENTON CITY OF WA5371850 | Renton | 107,119 | — | — | Compliant |
| RICHLAND CITY OF WA5372250 | Richland | 106,248 | 10.1 | 17 | Exceeds |
| NORTHSHORE UTILITY DISTRICT WA5340800 | Kenmore | 105,105 | — | — | Compliant |
| LACEY WATER DEPARTMENT WA5343500 | Lacey | 103,755 | — | — | Compliant |
| MARYSVILLE UTILITIES WA5351900 | Marysville | 88,589 | — | — | Compliant |
| SAMMAMISH PLATEAU WATER & SEWER WA5340900 | Sammamish | 79,362 | — | 11.1 | Exceeds |
| BREMERTON CITY OF WA5308200 | Bremerton | 70,913 | — | — | Compliant |
| LYNNWOOD CITY OF WA5349270 | Lynnwood | 68,204 | — | — | Compliant |
| KIRKLAND CITY OF WA5342250 | Kirkland | 67,107 | — | — | Compliant |
| TUMWATER CITY OF WA5389700 | Tumwater | 66,373 | — | — | Compliant |
| SOOS CREEK WATER & SEWER DISTRICT WA5340100 | Renton | 64,534 | — | — | Compliant |
| SOUTHWOOD WA5382844 | Tacoma | 64,155 | 6.2 | 8.9 | Exceeds |
| LAKEWOOD WATER DISTRICT WA5345550 | LAKEWOOD | 62,089 | — | 5.9 | Exceeds |
| SNO PUD 1 - LAKE STEVENS WA5380907 | Everett | 60,064 | — | — | Compliant |
| WOODINVILLE WATER DISTRICT WA5341600 | Woodinville | 59,873 | — | — | Compliant |
| JBLM Lewis WA5326050 | Joint Base Lewis-McChord | 58,497 | 6.8 | 11.1 | Exceeds |
| SILVER LAKE WATER & SEWER DISTRICT WA5379250 | Bothell | 56,582 | — | — | Compliant |
| COVINGTON WATER DISTRICT WA5341650 | Kent | 52,276 | — | 8.6 | Exceeds |
| PORT OF SEATTLE/SEATAC AIRPORT WA5303182 | Seattle | 49,483 | — | — | Compliant |
| LONGVIEW WATER DEPARTMENT WA5348100 | Longview | 49,111 | — | — | Compliant |
| TUKWILA WATER DEPARTMENT WA5389500 | Tukwila | 45,374 | — | — | Compliant |
| WENATCHEE CITY OF WA5394350 | Wenatchee | 43,690 | — | — | Compliant |
| ISSAQUAH WATER SYSTEM WA5336350 | ISSAQUAH | 43,584 | — | — | Compliant |
| WALLA WALLA WATER DIVISION WA5392500 | Walla Walla | 42,959 | — | — | Compliant |
| BONNEY LAKE WATER DEPARTMENT CITY WA5307650 | Buckley | 42,654 | — | — | Compliant |
| PUYALLUP CITY OF WA5370050 | Puyallup | 39,100 | — | — | Compliant |
| KING COUNTY WATER DISTRICT #20 WA5338950 | Seattle | 38,974 | — | — | Compliant |
| FIRGROVE MUTUAL INC WA5325200 | Puyallup | 36,168 | 4.4 | 8.6 | Exceeds |
| NOB HILL WATER ASSOCIATION WA5359700 | Yakima | 36,026 | — | — | Compliant |
| EDMONDS CITY OF WA5322500 | Edmonds | 34,023 | — | — | Compliant |
| BOTHELL WATER CITY OF WA5307900 | Bothell | 33,643 | — | — | Compliant |
| MOSES LAKE CITY OF WA5356300 | Moses Lake | 32,428 | — | 52.2 | Exceeds |
| FIFE DEPT OF PUBLIC WORKS WA5325050 | FIFE | 32,380 | — | — | Compliant |
| SPANAWAY WATER COMPANY WA5382850 | Spanaway | 31,908 | 6.2 | 8.3 | Exceeds |
| CAMAS MUNICIPAL WATER SEWER SYSTEM WA5310800 | Camas | 31,794 | 4.4 | 12 | Exceeds |
| North City Water District WA5339600 | Shoreline | 31,744 | — | — | Compliant |
| MERCER ISLAND CITY OF WA5353640 | Mercer Island | 30,689 | — | — | Compliant |
| QUIL CEDA VILLAGE 105300116 | TULALIP | 30,000 | — | — | Compliant |
| PULLMAN WATER DEPARTMENT CITY OF WA5369880 | Pullman | 29,690 | — | — | Compliant |
| PARKLAND LIGHT & WATER COMPANY WA5366200 | Tacoma | 29,595 | 6.2 | 13.8 | Exceeds |
| PORT ANGELES CITY OF WA5368550 | Port Angeles | 28,946 | — | — | Compliant |
| West Sound Utility District #1 WA5302600 | Port Orchard | 28,928 | 5.7 | — | Exceeds |
| CEDAR RIVER WATER & SEWER DISTRICT WA5341800 | Maple Valley | 28,671 | — | — | Compliant |
| CENTRALIA PUBLIC WORKS - WATER WA5312200 | Centralia | 28,164 | — | 5.8 | Exceeds |
| WHITWORTH WATER DISTRICT 2 WA5396601 | Mead | 26,883 | — | 4.6 | Exceeds |
| SILVERDALE WATER DIST 16 WA5379300 | Silverdale | 26,634 | — | — | Compliant |
| EAST WENATCHEE WATER DISTRICT WA5321800 | East Wenatchee | 26,519 | — | — | Compliant |
| MOUNTLAKE TERRACE CITY OF WA5357250 | Mountlake Terrace | 26,402 | — | — | Compliant |
| Mukilteo Water & Wastewater Distr WA5357550 | Mukilteo | 25,182 | — | — | Compliant |
| VERA WATER & POWER WA5391450 | Spokane Valley | 24,692 | — | — | Compliant |
| NORTH PERRY AVE WATER DISTRICT WA5360950 | Bremerton | 24,402 | — | — | Compliant |
| Lake Meridian Water District WA5341900 | Kent | 24,231 | — | — | Compliant |
| OAK HARBOR CITY OF WA5362650 | Oak Harbor | 23,767 | — | — | Compliant |
| MONROE WATER SYSTEM WA5355820 | Monroe | 23,467 | — | — | Compliant |
| ENUMCLAW WATER DEPARTMENT WA5323600 | Enumclaw | 23,276 | — | — | Compliant |
| CROSS VALLEY WATER DISTRICT WA5316270 | Snohomish | 23,054 | — | — | Compliant |
| PUD #1 OF ASOTIN COUNTY WA5393343 | Clarkston | 21,930 | — | — | Compliant |
| WASHINGTON STATE UNIVERSITY WA5393200 | Pullman | 21,506 | — | — | Compliant |
| WASHOUGAL CITY OF WA5393400 | Washougal | 21,441 | — | 7.9 | Exceeds |
| CONSOLIDATED IRRIG DIST 19 SYSTEM 2 WA5310221 | Greenacres | 21,220 | — | — | Compliant |
| ANACORTES CITY OF WA5302200 | Mount Vernon | 21,105 | — | — | Compliant |
| RIDGEFIELD PUBLIC WORKS WA5372400 | Ridgefield | 20,967 | — | — | Compliant |
| ELLENSBURG WATER DEPT WA5322950 | Ellensburg | 20,900 | — | — | Compliant |
| ARLINGTON CITY OF WA5302950 | Arlington | 20,418 | — | — | Compliant |
| KING COUNTY WATER DISTRICT NO 90 WA5341150 | Renton | 20,100 | — | — | Compliant |
| FERNDALE WA5324850 | Ferndale | 19,305 | — | — | Compliant |
| SPO CO WATER DIST 3 SYS 1 WA5393351 | Spokane | 18,983 | — | — | Compliant |
| MODERN ELECTRIC WATER CO WA5355600 | Spokane | 18,487 | — | — | Compliant |
| WEST RICHLAND CITY OF WA5394900 | West Richland | 18,280 | — | — | Compliant |
| LYNDEN WATER DEPARTMENT WA5349150 | Lynden | 17,969 | — | — | Compliant |
| ABERDEEN CITY OF WA5300050 | Aberdeen | 17,958 | — | — | Compliant |
| SHELTON CITY OF WA5378170 | SHELTON | 17,575 | — | — | Compliant |
| KING COUNTY WATER DISTRICT #125 WA5341998 | SEATTLE | 17,546 | — | — | Compliant |
| POULSBO CITY OF WA5369150 | Poulsbo | 17,180 | — | — | Compliant |
| EASTERN WASHINGTON UNIVERSITY WA5321900 | Cheney | 17,108 | — | — | Compliant |
| SUNNYSIDE CITY OF WA5385400 | Sunnyside | 17,037 | — | — | Compliant |
| PORT TOWNSEND CITY OF WA5369000 | Port Townsend | 16,977 | — | — | Compliant |
| NAVAL BASE KITSAP AT BANGOR WA5302714 | Silverdale | 16,828 | — | — | Compliant |
| YELM CITY OF WA5399350 | Yelm | 16,633 | — | — | Compliant |
| NAVAL AIR STATION/WHIDBEY ISLAND WA5303420 | NAS Whidbey Island | 16,595 | — | — | Compliant |
| NORTH PENINSULA WA5305122 | Poulsbo | 16,449 | — | — | Compliant |
| OLYMPIC VIEW WATER & SEWER DISTRICT WA5363600 | Edmonds | 16,403 | — | — | Compliant |
| SUMMIT WATER & SUPPLY CO WA5385050 | Tacoma | 16,109 | — | — | Compliant |
| KING COUNTY WATER DISTRICT #49 WA5339800 | Burien | 16,065 | — | — | Compliant |
| COAL CREEK UTILITY DISTRICT WA5341750 | Newcastle | 15,989 | — | — | Compliant |
| SNOQUALMIE WATER WA5381080 | SNOQUALIME | 15,848 | — | — | Compliant |
| CHELAN CO PUD 1 WA5312284 | Wenatchee | 15,840 | — | — | Compliant |
| PORT ORCHARD WATER DEPT WA5368900 | PORT ORCHARD | 15,810 | — | — | Compliant |
| SUMNER CITY OF WA5385120 | Sumner | 15,530 | — | — | Compliant |
| FRUITLAND MUTUAL WATER COMPANY WA5326800 | PUYALLUP | 15,313 | 4 | — | At risk |
| KELSO CITY OF WA5338000 | KELSO | 15,097 | — | — | Compliant |
| GIG HARBOR WATER DEPT WA5327600 | Gig Harbor | 14,902 | — | — | Compliant |
| CHENEY CITY OF WA5312400 | Cheney | 14,621 | — | — | Compliant |
| QUIMPER WA5305783 | Port Townsend | 14,500 | — | — | Compliant |
| SEQUIM CITY OF WA5377620 | SEQUIM | 14,293 | — | — | Compliant |
| LIBERTY LAKE SEWER & WATER DISTRICT WA5347150 | Liberty Lake | 14,212 | — | — | Compliant |
| STANWOOD WATER DEPT CITY OF WA5383650 | Stanwood | 13,785 | — | — | Compliant |
| DUPONT WATER SYSTEM CITY OF WA5320500 | DuPont | 13,141 | — | — | Compliant |
| JBLM McChord Field WA5352200 | Joint Base Lewis-McChord | 13,115 | — | 5.3 | Exceeds |
| SELAH CITY OF WA5377400 | Selah | 12,515 | — | — | Compliant |
| BAINBRIDGE ISLAND CITY OF WA5397650 | Bainbridge Island | 12,486 | — | — | Compliant |
| NAVAL BASE KITSAP AT BREMERTON WA5303468 | Silverdale | 12,078 | — | — | Compliant |
| SKYWAY WATER & SEWER WA5338800 | Seattle | 12,036 | — | — | Compliant |
| BEACON HILL WATER & SEWER DISTRICT WA5315650 | Kelso | 11,969 | — | — | Compliant |
| HOQUIAM WATER DEPARTMENT WA5334350 | HOQUIAM | 11,456 | — | — | Compliant |
| CHEHALIS WATER DEPARTMENT WA5312250 | Chehalis | 11,426 | — | — | Compliant |
| SNOHOMISH CITY OF WA5380915 | Snohomish | 11,258 | — | — | Compliant |
| GRANDVIEW CITY OF WA5328970 | Grandview | 11,010 | — | — | Compliant |
| WOODLAND CITY OF WA5398200 | WOODLAND | 10,640 | — | — | Compliant |
| MANCHESTER WATER DISTRICT WA5350700 | MANCHESTER | 10,437 | — | — | Compliant |
| ORTING CITY OF WA5364500 | Orting | 10,332 | — | — | Compliant |
| DUVALL CITY OF WA5320750 | DUVALL | 10,267 | — | — | Compliant |
| LWWSD - SOUTH SHORE WATER SYSTEM WA5395910 | Bellingham | 10,028 | — | — | Compliant |
| PORT ANGELES COMPOSITE WA5343296 | Carlsborg | 9,879 | — | — | Compliant |
| MOUNTAIN VIEW-EDGEWOOD WATER CO WA5356820 | Edgewood | 9,680 | — | — | Compliant |
| AIRWAY HEIGHTS CITY OF WA5300650 | Airway | 9,489 | — | — | Compliant |
| CONSOLIDATED IRRIG DIST 19 SYSTEM 1 WA5310220 | Greenacres | 9,434 | — | — | Compliant |
| CHELAN WATER DEPT CITY OF WA5312300 | Chelan | 9,425 | — | — | Compliant |
| OCEAN SHORES WATER DEPT WA5363008 | Hoquiam | 9,347 | — | — | Compliant |
| BIRCH BAY WATER & SEWER DISTRICT WA5395904 | Birch Bay | 9,019 | — | — | Compliant |
| TOPPENISH WATER DEPARTMENT WA5388850 | Toppenish | 8,950 | — | — | Compliant |
| OTHELLO WATER DEPARTMENT WA5364850 | Othello | 8,755 | — | — | Compliant |
| UNION HILL WATER ASSOCIATION INC WA5390260 | Redmond | 8,720 | — | — | Compliant |
| EPHRATA WATER DEPARTMENT WA5323650 | Ephrata | 8,620 | — | — | Compliant |
| STEILACOOM TOWN OF WA5384000 | Steilacoom | 8,545 | — | — | Compliant |
| NE SAMMAMISH SEWER & WATER DISTRICT WA5375265 | Sammamish | 8,516 | — | — | Compliant |
| QUINCY WATER DEPARTMENT CITY OF WA5370450 | Quincy | 8,415 | — | — | Compliant |
| YAK CO - TERRACE HEIGHTS WA5306029 | Yakima | 8,410 | — | — | Compliant |
| COLLEGE PLACE WATER DEPT WA5314050 | College Place | 8,147 | — | — | Compliant |
| NORTH BEACH WATER WA5363000 | Ocean Park | 8,093 | — | — | Compliant |
| MILTON CITY OF WA5354950 | MILTON | 8,078 | — | — | Compliant |
| KALAMA CITY OF WA5337550 | KALAMA | 8,020 | — | — | Compliant |
| FIRCREST CITY OF WA5325150 | Fircrest | 7,927 | — | — | Compliant |
| PACIFIC CITY OF WA5365300 | Buckley | 7,925 | — | — | Compliant |
| MODEL IRRIGATION DIST #18 WA5355550 | Spokane | 7,903 | 4.2 | — | Exceeds |
| TANGLEWILDE THOMPSON PLACE 600 WA5304397 | Lacey | 7,900 | — | — | Compliant |
| STEVENS CO PUD - SUNCREST WA5385202 | Loon Lake | 7,484 | — | — | Compliant |
| BUCKLEY WATER WA5309000 | BUCKLEY | 7,411 | — | — | Compliant |
| PEACOCK HILL WA5366637 | Tacoma | 7,401 | — | — | Exceeds |
| NORTH BEND CITY OF WA5360100 | North Bend | 7,228 | — | — | Compliant |
| SULTAN WATER DEPARTMENT WA5384770 | Sultan | 7,160 | — | — | Compliant |
| GRANITE FALLS CITY OF WA5329050 | Granite Falls | 6,926 | — | — | Compliant |
| LAKE CHELAN RECLAMATION DISTRICT WA5343783 | Manson | 6,798 | — | — | Compliant |
| ELMA CITY OF WA5323100 | ELMA | 6,638 | — | — | Compliant |
| SALLAL WATER ASSOCIATION INC WA5375560 | North Bend | 6,600 | — | — | Compliant |
| UNION GAP WATER WA5390250 | Union Gap | 6,433 | — | — | Compliant |
| ENERGY DEPT OF/200W WA5300100 | Richland | 6,351 | — | — | Compliant |
| BLAINE CITY OF WA5307300 | BLAINE | 6,319 | — | — | Compliant |
| PASADENA PARK IRR DIST 17 WA5366300 | Spokane | 6,269 | — | — | Compliant |
| PROSSER CITY OF WA5369750 | Prosser | 6,211 | — | — | Compliant |
| SPO CO WATER DIST 3 SYS 4 WA5393354 | Spokane | 6,155 | — | — | Compliant |
| TULALIP BAY WATER DIST #1 105300003 | TULALIP | 5,968 | — | — | Compliant |
| ARTONDALE WA5303160 | Tacoma | 5,828 | 6.3 | 153.6 | Exceeds |
| SEVEN LAKES WATER ASSOCIATION WA5377660 | Stanwood | 5,823 | — | — | Compliant |
| SNOQUALMIE PASS UTILITY DISTRICT WA5381048 | Snoqualmie Pass | 5,805 | — | — | Compliant |
| BENTON CITY WATER WA5305800 | Benton City | 5,626 | — | 8.7 | Exceeds |
| MOXEE WATER DEPARTMENT WA5357300 | MOXEE | 5,599 | — | — | Compliant |
| FAIRCHILD AIR FORCE BASE WA5324350 | Fairchild AFB | 5,553 | — | 7.9 | Exceeds |
| MONTESANO CITY OF WA5356000 | Montesano | 5,492 | — | — | Compliant |
| NORTH BAINBRIDGE WATER CO WA5359994 | Poulsbo | 5,490 | — | — | Compliant |
| WESTPORT WATER DEPARTMENT WA5395300 | WESTPORT | 5,346 | — | — | Compliant |
| WAPATO WATERWORKS WA5392800 | Wapato | 5,255 | — | — | Compliant |
| POINT EVANS WA5368065 | Tacoma | 5,211 | — | — | Compliant |
| CONNELL CITY OF WA5314600 | Connell | 5,150 | — | — | Compliant |
| GRAYS HARBOR CO WATER DIST 2 WA5329250 | Montesano | 5,112 | — | — | Compliant |
| MINTERBROOK WA5354740 | Tacoma | 5,083 | — | — | Compliant |
| DEER PARK CITY OF WA5318500 | Deer Park | 5,045 | — | 7.5 | Exceeds |
| KING COUNTY WATER DISTRICT #54 WA5339950 | Des Moines | 5,037 | — | — | Compliant |
| Mattawa City of WA5352000 | Mattawa | 5,015 | — | — | Compliant |
| SPOKANE BUSINESS & INDUSTRIAL PARK WA5383027 | Spokane | 5,000 | — | — | Compliant |
| MEDICAL LAKE CITY OF WA5353400 | Medical Lake | 4,982 | — | 4.4 | Exceeds |
| COLVILLE WATER DEPARTMENT WA5314200 | Colville | 4,955 | — | — | Compliant |
| OMAK CITY OF WA5363750 | Omak | 4,940 | — | — | Compliant |
| LONGMIRE WA53NP580 | Ashford | 4,871 | — | — | Compliant |
| VINLAND WA5391923 | Poulsbo | 4,801 | — | — | Compliant |
| FORKS MUNICIPAL WATER DEPT WA5326000 | FORKS | 4,744 | — | — | Compliant |
| WARDEN CITY OF WA5392850 | Warden | 4,674 | — | — | Compliant |
| Raymond Water Department WA5371500 | RAYMOND | 4,620 | — | — | Compliant |
| LONG BEACH WATER DEPARTMENT WA5348000 | LONG BEACH | 4,592 | — | — | Compliant |
| CASTLE ROCK MUNICIPAL WATER WA5311800 | CASTLE ROCK | 4,367 | — | — | Compliant |
| ORCHARD AVENUE IRRIGATION DIST 6 WA5364000 | Spokane | 4,330 | — | — | Compliant |
| GOLDENDALE CITY OF WA5328450 | Goldendale | 4,314 | — | — | Compliant |
| PATTISON 500 WA5366578 | Lacey | 4,302 | — | — | Compliant |
| EAST SPOKANE WATER DIST 1 WA5321650 | Spokane Valley | 4,285 | — | 5.5 | Exceeds |
| TRENTWOOD IRRIGATION DISTRICT 3 WA5389250 | SPOKANE | 4,228 | 5.1 | 12 | Exceeds |
| SUQUAMISH WA5386400 | Poulsbo | 4,203 | — | — | Compliant |
| CRYSTAL MOUNTAIN INC WA5316400 | Raymond | 4,154 | — | — | Compliant |
| IRVIN WATER DISTRICT #6 WA5336050 | Spokane | 4,150 | — | — | Compliant |
| WHITE SALMON CITY OF WA5396350 | White Salmon | 4,077 | — | — | Compliant |
| COUPEVILLE TOWN OF WA5315550 | Coupeville | 4,077 | 9.8 | — | Exceeds |
| STEVENS PASS WATER SYSTEM WA5384245 | Leavenworth | 4,053 | — | — | Compliant |
| GRANGER WATER DEPARTMENT WA5329000 | Granger | 3,993 | — | — | Compliant |
| KING COUNTY WATER DISTRICT 119 WA5341985 | Duvall | 3,796 | — | — | Compliant |
| EVERSON CITY OF WA5324200 | Everson | 3,788 | — | — | Compliant |
| SPO CO WATER DIST 3 SYS 3 WA5393353 | Spokane | 3,765 | — | — | Compliant |
| PARKVIEW TERRACE WA5366215 | Tacoma | 3,730 | — | — | Compliant |
| WATER DISTRICT 19 WA5338900 | Vashon | 3,723 | — | — | Compliant |
| EASTSOUND WATER USERS ASSOCIATION WA5322170 | Eastsound | 3,711 | — | — | Compliant |
| LUMMI TRIBAL WATER DISTRICT 105300002 | BELLINGHAM | 3,699 | — | — | Compliant |
| LAKE CUSHMAN SYSTEM 5 WA5303529 | Hoodsport | 3,675 | — | — | Compliant |
| EATONVILLE WATER DEPT WA5322300 | Eatonville | 3,645 | — | — | Compliant |
| FRIDAY HARBOR TOWN OF WA5326595 | Friday Harbor | 3,543 | — | — | Compliant |
| NACHES TOWN OF WA5358100 | Naches | 3,512 | — | — | Compliant |
| COLFAX WATER DEPARTMENT CITY OF WA5314000 | Colfax | 3,507 | — | — | Compliant |
| HORIZONS WEST WA5334375 | Tacoma | 3,454 | — | — | Compliant |
| Tenino City of WA5387400 | TENINO | 3,336 | — | — | Compliant |
| MT. VISTA - DUNGENESS GOLF COURSE 105388889 | SEQUIM | 3,200 | — | — | Compliant |
| LAKE FOREST PARK WATER DISTRICT WA5340950 | Lake Forest Park | 3,171 | — | — | Compliant |
| Snake River Housing Water System WA5300710 | Yakima | 3,036 | — | — | Compliant |
| MCCORMICK WOODS WA5340529 | PORT ORCHARD | 2,760 | — | — | Compliant |
| WEST SEQUIM BAY INC WA5354192 | SEQUIM | 2,759 | — | — | Compliant |
| GOLD BAR CITY OF WA5328300 | Goldbar | 2,745 | — | — | Compliant |
| Columbia Valley Water District WA5366110 | Maple Falls | 2,648 | — | — | Compliant |
| SWINOMISH CASINO & LODGE 105338108 | LA CONNER | 2,400 | — | — | Compliant |
| CRESCENT WATER ASSN WA5316020 | JOYCE | 2,360 | — | — | Compliant |
| SHELTER BAY COMMUNITY INC WA5378155 | La Conner | 2,212 | — | — | Compliant |
| HEIGHTS WATER WA5332300 | Vashon | 2,051 | — | — | Compliant |