PFAS in Washington Water
Based on EPA UCMR 5 testing of 66 public water systems in Washington.
See Washington on the national heatmap66
Systems Tested
66
With PFAS Detected
34
Above EPA Limits
52%
Exceed MCL
Most Commonly Detected PFAS in Washington
Systems with detections · EPA UCMR 5 (2023–2025)
PFBS 50 systems
PFPeA 35 systems
PFHxA 31 systems
PFOS 30 systems
PFHxS 25 systems
PFOA 17 systems
Check your Washington ZIP code
Get specific results for your neighborhood's water utility.
Water Systems in Washington (66)
Click any row to see ZIP-level details| Water System | PWSID | PFAS Detected | Above MCL | Risk |
|---|---|---|---|---|
| ARTONDALE WATER SYSTEM Groundwater | WA5303160 | 8 | 3 | High Risk |
| KENNEWICK CITY OF GU | WA5338100 | 6 | 3 | High Risk |
| RICHLAND CITY OF Groundwater | WA5372250 | 8 | 2 | High Risk |
| QUISTORFF Groundwater | WA5370550 | 7 | 2 | High Risk |
| VANCOUVER CITY OF Groundwater | WA5391200 | 7 | 2 | High Risk |
| BENTON CITY WATER Groundwater | WA5305800 | 6 | 2 | High Risk |
| SAMMAMISH PLATEAU WATER & SEWER Groundwater | WA5340900 | 6 | 2 | High Risk |
| PARKLAND LIGHT & WATER COMPANY Groundwater | WA5366200 | 6 | 2 | High Risk |
| SOUTHWOOD WATER SYSTEM Groundwater | WA5382844 | 6 | 2 | High Risk |
| SPANAWAY WATER COMPANY Groundwater | WA5382850 | 6 | 2 | High Risk |
| CLARK PUBLIC UTILITIES Groundwater | WA5313333 | 5 | 2 | High Risk |
| FAIRCHILD AIR FORCE BASE Groundwater | WA5324350 | 5 | 2 | High Risk |
| JBLM Lewis Groundwater | WA5326050 | 5 | 2 | High Risk |
| MOSES LAKE CITY OF Groundwater | WA5356300 | 5 | 2 | High Risk |
| OLYMPIA CITY OF Groundwater | WA5363450 | 5 | 2 | High Risk |
| TRENTWOOD IRRIGATION DISTRICT 3 Groundwater | WA5389250 | 5 | 2 | High Risk |
| CAMAS MUNICIPAL WATER SEWER SYSTEM Groundwater | WA5310800 | 3 | 2 | High Risk |
| FIRGROVE MUTUAL INC Groundwater | WA5325200 | 3 | 2 | High Risk |
| COUPEVILLE TOWN OF Groundwater | WA5315550 | 7 | 1 | High Risk |
| PEACOCK HILL Groundwater | WA5366637 | 7 | 1 | High Risk |
| LAKEHAVEN WATER AND SEWER DISTRICT Groundwater | WA5341997 | 6 | 1 | High Risk |
| COVINGTON WATER DISTRICT Groundwater | WA5341650 | 5 | 1 | High Risk |
| LAKEWOOD WATER DISTRICT Groundwater | WA5345550 | 5 | 1 | High Risk |
| West Sound Utility District #1 Groundwater | WA5302600 | 4 | 1 | High Risk |
| MODEL IRRIGATION DIST #18 Groundwater | WA5355550 | 4 | 1 | High Risk |
| SPOKANE CITY OF Groundwater | WA5383100 | 4 | 1 | High Risk |
| WHITWORTH WATER DISTRICT 2 Groundwater | WA5396601 | 4 | 1 | High Risk |
| DEER PARK CITY OF Groundwater | WA5318500 | 3 | 1 | High Risk |
| WASHOUGAL CITY OF Groundwater | WA5393400 | 3 | 1 | High Risk |
| CENTRALIA PUBLIC WORKS - WATER Groundwater | WA5312200 | 2 | 1 | High Risk |
| JBLM McChord Field Groundwater | WA5352200 | 2 | 1 | High Risk |
| MEDICAL LAKE CITY OF Groundwater | WA5353400 | 2 | 1 | High Risk |
| REDMOND WATER SYSTEM CITY OF Groundwater | WA5371650 | 2 | 1 | High Risk |
| EAST SPOKANE WATER DIST 1 Groundwater | WA5321650 | 1 | 1 | High Risk |
| AIRWAY HEIGHTS CITY OF Groundwater | WA5300650 | 4 | 0 | Low Level |
| FRUITLAND MUTUAL WATER COMPANY Groundwater | WA5326800 | 4 | 0 | Low Level |
| LACEY WATER DEPARTMENT Groundwater | WA5343500 | 4 | 0 | Low Level |
| MILTON CITY OF Groundwater | WA5354950 | 4 | 0 | Low Level |
| CROSS VALLEY WATER DISTRICT Groundwater | WA5316270 | 3 | 0 | Low Level |
| MINTERBROOK Groundwater | WA5354740 | 3 | 0 | Low Level |
| LAKE CUSHMAN SYSTEM 5 Groundwater | WA5303529 | 2 | 0 | Low Level |
| STEVENS CO PUD - SUNCREST Groundwater | WA5385202 | 2 | 0 | Low Level |
| TACOMA WATER DIVISION CITY OF Groundwater | WA5386800 | 2 | 0 | Low Level |
| ARLINGTON WATER DEPT Groundwater | WA5302950 | 1 | 0 | Low Level |
| Auburn City of Groundwater | WA5303350 | 1 | 0 | Low Level |
| QUIMPER Groundwater | WA5305783 | 1 | 0 | Low Level |
| BONNEY LAKE WATER DEPARTMENT CITY Groundwater | WA5307650 | 1 | 0 | Low Level |
| BREMERTON CITY OF Groundwater | WA5308200 | 1 | 0 | Low Level |
| FIRCREST CITY OF Groundwater | WA5325150 | 1 | 0 | Low Level |
| HORIZONS WEST Groundwater | WA5334375 | 1 | 0 | Low Level |
| IRVIN WATER DISTRICT #6 Groundwater | WA5336050 | 1 | 0 | Low Level |
| KENT WATER DEPARTMENT Groundwater | WA5338150 | 1 | 0 | Low Level |
| CEDAR RIVER WATER & SEWER DISTRICT Surface Water | WA5341800 | 1 | 0 | Low Level |
| PORT ANGELES COMPOSITE Surface Water | WA5343296 | 1 | 0 | Low Level |
| LIBERTY LAKE SEWER & WATER DISTRICT Groundwater | WA5347150 | 1 | 0 | Low Level |
| MOUNTAIN VIEW-EDGEWOOD WATER CO Groundwater | WA5356820 | 1 | 0 | Low Level |
| Northwest Water Assoc. Inc. Groundwater | WA5362000 | 1 | 0 | Low Level |
| OMAK CITY OF Groundwater | WA5363750 | 1 | 0 | Low Level |
| PARKVIEW TERRACE Groundwater | WA5366215 | 1 | 0 | Low Level |
| PUYALLUP CITY OF Groundwater | WA5370050 | 1 | 0 | Low Level |
| RENTON CITY OF Groundwater | WA5371850 | 1 | 0 | Low Level |
| SEQUIM CITY OF Groundwater | WA5377620 | 1 | 0 | Low Level |
| SKAGIT COUNTY PUD 1 JUDY RES Surface Water | WA5379500 | 1 | 0 | Low Level |
| SUMMIT WATER & SUPPLY CO Groundwater | WA5385050 | 1 | 0 | Low Level |
| TUMWATER CITY OF Groundwater | WA5389700 | 1 | 0 | Low Level |
| WOODLAND CITY OF Surface Water | WA5398200 | 1 | 0 | Low Level |