Drinking water / WA
PFAS in Washington drinking water
248 Washington public water systems tested under UCMR5. 68 detected at least one PFAS compound; 180 detected none at the reporting thresholds. Values are the highest single result per compound, in ng/L (parts per trillion). The federal limit for PFOA and PFOS is 4 ng/L.
| Water system | Serves | Highest results (ng/L) | Reading |
|---|---|---|---|
| ARTONDALE WATER SYSTEM WA5303160 | Pierce | PFOS 153.6 *PFHxS 55.8PFBS 28.9PFPeS 19.4 | above final limit |
| BENTON CITY WATER WA5305800 | Benton | PFHxS 14.3PFOS 8.7 *PFHxA 5.5PFPeA 5.3 | above final limit |
| CAMAS MUNICIPAL WATER SEWER SYSTEM WA5310800 | Clark | PFOS 12 *PFOA 4.4 *PFBS 3.8 | above final limit |
| CENTRALIA PUBLIC WORKS - WATER WA5312200 | Lewis | PFOS 5.8 *PFBS 4.2 | above final limit |
| CLARK PUBLIC UTILITIES WA5313333 | Clark | PFOS 8.4 *PFOA 8 *PFHxS 5.3PFBS 4.1 | above final limit |
| COUPEVILLE TOWN OF WA5315550 | Island | PFHxA 17PFPeA 12PFOA 9.8 *PFBS 6.7 | above final limit |
| COVINGTON WATER DISTRICT WA5341650 | King | PFBS 14PFOS 8.6 *PFHxS 7.5PFPeA 3.9 | above final limit |
| DEER PARK CITY OF WA5318500 | Spokane | PFOS 7.5 *PFNA 4.3PFBS 3.1 | above final limit |
| EAST SPOKANE WATER DIST 1 WA5321650 | Spokane | PFOS 5.5 * | above final limit |
| FAIRCHILD AIR FORCE BASE WA5324350 | Spokane | PFHxS 17PFOS 7.9 *PFPeA 3.6PFBS 3.6 | above final limit |
| FIRGROVE MUTUAL INC WA5325200 | Pierce | PFOS 8.6 *PFBS 5.4PFOA 4.4 * | above final limit |
| JBLM Lewis WA5326050 | Pierce | PFOS 11.1 *PFHxS 8.8PFOA 6.8 *PFBS 5.4 | above final limit |
| JBLM McChord Field WA5352200 | Pierce | PFHxS 8PFOS 5.3 * | above final limit |
| KENNEWICK CITY OF WA5338100 | Benton | PFOS 11.5 *PFHxS 10.6PFPeA 7.5PFHxA 6.5 | above final limit |
| LAKEHAVEN WATER AND SEWER DISTRICT WA5341997 | King | PFPeA 13.7PFHxA 7.6PFHxS 5.8PFOS 4.1 * | above final limit |
| LAKEWOOD WATER DISTRICT WA5345550 | Pierce | PFPeA 8.2PFBA 6.6PFOS 5.9 *PFHxS 5.6 | above final limit |
| MEDICAL LAKE CITY OF WA5353400 | Spokane | PFHxS 5.3PFOS 4.4 * | above final limit |
| MODEL IRRIGATION DIST #18 WA5355550 | Spokane | PFPeA 5.8PFOS 5.3 *PFOA 4.2 *PFHxA 3.9 | above final limit |
| MOSES LAKE CITY OF WA5356300 | Grant | PFHxS 54.1PFOS 52.2 *PFHxA 7.3PFPeS 5.3 | above final limit |
| Northwest Water Assoc. Inc. WA5362000 | Whatcom | PFOA 4.7 *PFBS 4.1 | above final limit |
| OLYMPIA CITY OF WA5363450 | Thurston | PFOS 5.8 *PFBS 4.8PFOA 4.3 *PFHxA 4 | above final limit |
| PARKLAND LIGHT & WATER COMPANY WA5366200 | Pierce | PFOS 13.8 *PFBS 7.5PFOA 6.2 *PFPeA 5.5 | above final limit |
| QUISTORFF WA5370550 | Pierce | PFHxS 44PFBS 35PFPeS 20PFPeA 17 | above final limit |
| REDMOND WATER SYSTEM CITY OF WA5371650 | King | PFBS 5PFOS 5 * | above final limit |
| RICHLAND CITY OF WA5372250 | Benton | PFOS 17 *PFPeA 14.5PFHxA 11.6PFOA 10.1 * | above final limit |
| SAMMAMISH PLATEAU WATER & SEWER WA5340900 | King | PFHxS 16.5PFOS 11.1 *PFBS 8.8PFHxA 4.3 | above final limit |
| SOUTHWOOD WATER SYSTEM WA5382844 | Pierce | PFPeA 110PFHxA 48PFBA 14PFOS 8.9 * | above final limit |
| SPANAWAY WATER COMPANY WA5382850 | Pierce | PFOS 8.3 *PFBS 7.5PFOA 6.2 *PFHxA 5.9 | above final limit |
| SPOKANE CITY OF WA5383100 | Spokane | PFOS 6.1 *PFBS 3.9PFHxA 3.5PFPeA 3.3 | above final limit |
| TRENTWOOD IRRIGATION DISTRICT 3 WA5389250 | Spokane | PFOS 12 *PFOA 5.1 *PFBS 4.9PFHxA 4 | above final limit |
| VANCOUVER CITY OF WA5391200 | Clark | PFOS 18.6 *PFOA 11.5 *PFBS 7.6PFPeA 7.4 | above final limit |
| WASHOUGAL CITY OF WA5393400 | Clark | PFOS 7.9 *PFBS 3.3PFPeA 3.1 | above final limit |
| West Sound Utility District #1 WA5302600 | Kitsap | PFHxS 8PFOA 5.7 *PFPeA 5.3PFHxA 4.9 | above final limit |
| WHITWORTH WATER DISTRICT 2 WA5396601 | Spokane | PFBS 5.2PFOS 4.6 *PFPeA 3.5PFHxA 3.1 | above final limit |
| AIRWAY HEIGHTS CITY OF WA5300650 | Spokane | PFPeA 139.3PFBA 79.2PFHxA 23.7PFHxS 3.2 | detected |
| ARLINGTON WATER DEPT WA5302950 | Snohomish | PFHxS 4.9 | detected |
| Auburn City of WA5303350 | King | PFBS 4.1 | detected |
| BONNEY LAKE WATER DEPARTMENT CITY WA5307650 | Pierce | PFBS 4.7 | detected |
| BREMERTON CITY OF WA5308200 | Kitsap | PFBS 4.9 | detected |
| CEDAR RIVER WATER & SEWER DISTRICT WA5341800 | King | PFBA 12.2 | detected |
| CROSS VALLEY WATER DISTRICT WA5316270 | Snohomish | PFBS 9.4PFHxA 6.4PFPeA 4.9 | detected |
| FIFE DEPT OF PUBLIC WORKS WA5325050 | Pierce | PFHxS 5PFBS 4 | detected |
| FIRCREST CITY OF WA5325150 | Pierce | PFBS 5.4 | detected |
| FRUITLAND MUTUAL WATER COMPANY WA5326800 | Pierce | PFBS 5.1PFOA 4PFPeA 3.4PFHxA 3.4 | detected |
| HORIZONS WEST WA5334375 | Kitsap | 6:2 FTS 9.5 | detected |
| IRVIN WATER DISTRICT #6 WA5336050 | Spokane | PFPeA 4.2 | detected |
| KENT WATER DEPARTMENT WA5338150 | King | PFBS 3.5 | detected |
| LACEY WATER DEPARTMENT WA5343500 | Thurston | PFPeA 18.8PFHxA 9.8PFBS 4.2PFHxS 3.1 | detected |
| LAKE CUSHMAN SYSTEM 5 WA5303529 | Mason | PFPeA 6.3PFHxA 4.6 | detected |
| LIBERTY LAKE SEWER & WATER DISTRICT WA5347150 | Spokane | PFBS 3.2 | detected |
| MILTON CITY OF WA5354950 | Pierce | PFPeA 6.6PFBA 5.5PFHxA 5.3PFBS 3.7 | detected |
| MINTERBROOK WA5354740 | Pierce | PFBS 4PFPeA 3.8PFHxA 3.3 | detected |
| MOUNTAIN VIEW-EDGEWOOD WATER CO WA5356820 | Pierce | PFBS 3.6 | detected |
| OMAK CITY OF WA5363750 | Okanogan | PFPeA 3.4 | detected |
| PACIFIC, CITY OF WA5365300 | King | PFBS 8.3 | detected |
| PARKVIEW TERRACE WA5366215 | Kitsap | PFBS 5.5 | detected |
| PEACOCK HILL WA5366637 | Pierce | PFPeA 25.6PFHxA 18.8PFBS 16PFHxS 14.9 | detected |
| PORT ANGELES COMPOSITE WA5343296 | Clallam | PFBA 5 | detected |
| PUYALLUP CITY OF WA5370050 | Pierce | PFBS 4.4 | detected |
| QUIMPER WA5305783 | Jefferson | PFBS 3.1 | detected |
| RENTON CITY OF WA5371850 | King | PFBS 3 | detected |
| SEQUIM CITY OF WA5377620 | Clallam | PFBS 5.8 | detected |
| SKAGIT COUNTY PUD 1 JUDY RES WA5379500 | Skagit | PFBA 21.1 | detected |
| STEVENS CO PUD - SUNCREST WA5385202 | Stevens | PFHxA 4.4PFPeA 3.4 | detected |
| SUMMIT WATER & SUPPLY CO WA5385050 | Pierce | PFPeA 3.1 | detected |
| TACOMA WATER DIVISION CITY OF WA5386800 | Pierce | PFHxS 5.1PFBS 3.3 | detected |
| TUMWATER CITY OF WA5389700 | Thurston | PFBS 6.8 | detected |
| WOODLAND CITY OF WA5398200 | Cowlitz | PFBA 23.4 | detected |
* exceeds the final federal MCL for that compound. Detections of compounds whose limits EPA proposed to rescind in May 2026 are shown for information.
Systems with no PFAS detected
180 tested systems reported no PFAS above the laboratory reporting limits. Each has its own page with its sampling detail.
- ABERDEEN CITY OF
- ALDERWOOD WATER DISTRICT
- ANACORTES CITY OF
- BAINBRIDGE ISLAND CITY OF
- BATTLE GROUND WATER DEPT CITY OF
- BAYSHORE
- BEACON HILL WATER & SEWER DISTRICT
- BELLEVUE CITY OF
- BELLINGHAM-WATER DIVISION CITY OF
- BIRCH BAY WATER & SEWER DISTRICT
- BLAINE CITY OF
- BOTHELL WATER CITY OF
- BUCKLEY WATER
- CASTLE ROCK MUNICIPAL WATER
- CEDAR GROVE MOBILE PARK
- CHEHALIS WATER DEPARTMENT
- CHELAN CO PUD 1
- CHELAN WATER DEPT CITY OF
- CHENEY CITY OF
- COAL CREEK UTILITY DISTRICT
- COLFAX WATER DEPARTMENT CITY OF
- COLLEGE PLACE WATER DEPT
- Columbia Valley Water District
- COLVILLE WATER DEPARTMENT
- CONNELL CITY OF
- CONSOLIDATED IRRIG DIST 19 SYSTEM 1
- CONSOLIDATED IRRIG DIST 19 SYSTEM 2
- CONSOLIDATED SUPPORT SERVICES
- CRESCENT WATER ASSN
- CRYSTAL MOUNTAIN INC
- DUNGENESS MEADOWS
- DUPONT WATER SYSTEM CITY OF
- DUVALL CITY OF
- EAST WENATCHEE WATER DISTRICT
- EASTERN WASHINGTON UNIVERSITY
- EASTSOUND WATER USERS ASSOCIATION
- EATONVILLE WATER DEPT
- EDMONDS CITY OF
- ELLENSBURG WATER DEPT
- ELMA, CITY OF
- EMERALD LAKE
- ENERGY DEPT OF/200W
- ENUMCLAW WATER DEPARTMENT
- EPHRATA WATER DEPARTMENT
- EVERETT PUBLIC WORKS DEPT. CITY OF
- EVERSON CITY OF
- FERNDALE WA
- FORKS MUNICIPAL WATER DEPT
- FRIDAY HARBOR TOWN OF
- GIG HARBOR WATER DEPT
- GOLD BAR CITY OF
- GOLDENDALE CITY OF
- GRANDVIEW CITY OF
- GRANGER WATER DEPARTMENT
- GRANITE FALLS CITY OF
- GRAYS HARBOR CO WATER DIST 2
- HARRINGTON CITY OF
- HEIGHTS WATER
- HI VALLEY VIEW
- HIGHLINE WATER DISTRICT
- HOQUIAM WATER DEPARTMENT
- ISSAQUAH WATER SYSTEM
- KALAMA CITY OF
- KELSO CITY OF
- KING COUNTY WATER DISTRICT #125
- KING COUNTY WATER DISTRICT #20
- KING COUNTY WATER DISTRICT #49
- KING COUNTY WATER DISTRICT #54
- KING COUNTY WATER DISTRICT 119
- KING COUNTY WATER DISTRICT NO 90
- KIRKLAND CITY OF
- LAKE CHELAN RECLAMATION DISTRICT
- LAKE FOREST PARK WATER DISTRICT
- Lake Meridian Water District
- LONG BEACH WATER DEPARTMENT
- LONGMIRE
- LONGVIEW WATER DEPARTMENT
- LOST LAKE PROPERTY OWNERS ASSN
- LWWSD - SOUTH SHORE WATER SYSTEM
- LYNDEN WATER DEPARTMENT
- LYNNWOOD CITY OF
- MANCHESTER WATER DISTRICT
- MARYSVILLE UTILITIES
- Mattawa City of
- MCCORMICK WOODS
- MERCER ISLAND CITY OF
- MODERN ELECTRIC WATER CO
- MONROE WATER SYSTEM, WA
- MONTESANO CITY OF
- MOUNTLAKE TERRACE CITY OF
- MOXEE WATER DEPARTMENT
- Mukilteo Water & Wastewater Distr
- NACHES TOWN OF
- NAVAL AIR STATION/WHIDBEY ISLAND
- NAVAL BASE KITSAP AT BANGOR
- NAVAL BASE KITSAP AT BREMERTON
- NE SAMMAMISH SEWER & WATER DISTRICT
- NOB HILL WATER ASSOCIATION
- NORTH BAINBRIDGE WATER CO
- NORTH BEACH WATER
- NORTH BEND, CITY OF
- North City Water District
- NORTH PENINSULA
- NORTH PERRY AVE WATER DISTRICT
- NORTHSHORE UTILITY DISTRICT
- NORTHWEST TREK
- OAK HARBOR CITY OF
- OCEAN SHORES WATER DEPT
- OLYMPIC VIEW WATER & SEWER DISTRICT
- ORCHARD AVENUE IRRIGATION DIST 6
- ORTING CITY OF
- OTHELLO WATER DEPARTMENT
- PASADENA PARK IRR DIST 17
- PASCO WATER DEPARTMENT
- PATTISON
- POINT EVANS
- PORT ANGELES CITY OF
- PORT OF SEATTLE/SEATAC AIRPORT
- Port Orchard Water
- PORT TOWNSEND CITY OF
- POULSBO CITY OF
- PROSSER CITY OF
- PUD #1 OF ASOTIN COUNTY
- PULLMAN WATER DEPARTMENT CITY OF
- QUINCY WATER DEPARTMENT CITY OF
- Raymond Water Department
- RIDGEFIELD PUBLIC WORKS
- Rogers Group Properties I LLC
- SALLAL WATER ASSOCIATION INC
- SEABECK
- SEASCAPE WATER ASSOCIATION
- SEATTLE PUBLIC UTILITIES
- SELAH CITY OF
- SEVEN LAKES WATER ASSOCIATION
- SHELTER BAY COMMUNITY INC
- SHELTON CITY OF
- SILVER LAKE WATER & SEWER DISTRICT
- SILVERDALE WATER DIST 16
- SKYWAY WATER & SEWER
- Snake River Housing Water System
- SNO PUD 1 - LAKE STEVENS
- SNOHOMISH CITY OF
- SNOQUALMIE PASS UTILITY DISTRICT
- SNOQUALMIE WATER
- SOOS CREEK WATER & SEWER DISTRICT
- SPO CO WATER DIST 3 SYS 2
- SPO CO WATER DIST 3 SYS 3
- SPO CO WATER DIST 3 SYS 4
- SPOKANE BUSINESS & INDUSTRIAL PARK
- STANWOOD WATER DEPT CITY OF
- STEILACOOM TOWN OF
- STEVENS CO PUD - VALLEY
- STEVENS PASS WATER SYSTEM
- SULTAN WATER DEPARTMENT
- SUMNER CITY OF
- SUNNYSIDE CITY OF
- SUQUAMISH
- Tanglewilde-Thompson Place 600
- Tenino City of
- TOPPENISH WATER DEPARTMENT
- TUKWILA WATER DEPARTMENT
- UNION GAP WATER
- UNION HILL WATER ASSOCIATION INC
- VERA WATER & POWER
- VINLAND
- WALLA WALLA WATER DIVISION
- WAPATO WATERWORKS
- WARDEN CITY OF
- WASHINGTON STATE UNIVERSITY
- WATER DISTRICT 19
- WENATCHEE CITY OF
- WEST RICHLAND CITY OF
- WEST SEQUIM BAY INC
- WESTPORT WATER DEPARTMENT
- WHATCOM COUNTY WATER DIST 13
- WHITE SALMON CITY OF
- WOODINVILLE WATER DISTRICT
- YAK CO - TERRACE HEIGHTS
- YAKIMA WATER DIVISION CITY OF
- YELM CITY OF
A detection at the system level does not tell you what reaches one specific tap: levels vary by entry point, treatment train and plumbing. A certified lab test of your own tap settles it. Testing and treatment options