Is pfas a problem in Washington drinking water?

PFAS was detected in Washington water systems but within the EPA limit of 4 ppt (PFOA/PFOS). Check the ZIP code table on this page for area-specific data.

How widespread is pfas in Washington water?

No pfas detections were reported in Washington in the exported EPA records.

PFAS · Washington

PFAS in Washington Drinking Water — 0 Violations

EPA data analysis for pfas in Washington drinking water systems

ZIPs with Violations

4 ppt (PFOA/PFOS)

EPA Limit

High

Health Risk

Reverse Osmosis or Granular Activated Carbon

Best Filter Method

PFAS Contamination in Washington

ZipCheckup analyzed EPA enforcement records across 422 ZIP codes in Washington. 0 ZIP codes have pfas-related violations on record.

EPA Standard for PFAS

The EPA maximum contaminant level (MCL) for pfas is 4 ppt (PFOA/PFOS), governed by the PFAS NPDWR (2024). Water systems that exceed this limit must take corrective action and notify consumers.

Health Effects of PFAS

PFAS (per- and polyfluoroalkyl substances) are linked to cancer (kidney, testicular), thyroid disease, immune system suppression, reproductive problems, and elevated cholesterol. These "forever chemicals" persist in the body for years.

How to Remove PFAS From Drinking Water

The most effective treatment for pfas removal is Reverse Osmosis or Granular Activated Carbon. Look for filters certified under NSF 53 / NSF 58 standards.

Check Your ZIP Code

Use the ZipCheckup water quality search to see pfas data for your specific water system in Washington.

Cities with PFAS Data in Washington

62 cities in Washington have pfas testing data available.

Airway Heights Arlington Auburn Battle Ground Bellingham Benton City Bonney Lake Bothell Bremerton Brush Prairie Buckley Burlington Camas Centralia Cheney Colbert Coupeville Deer Park Enumclaw Federal Way

+ 42 more cities

Washington Water Quality Overview: See statewide water quality rankings on the Washington water quality page.

Learn more about PFAS: Read the full guide on PFAS in drinking water.

Home → Contaminants → PFAS → Washington

How to cite this page

APA

ZipCheckup. (2026). PFAS in Washington Drinking Water — 0 Violations. https://zipcheckup.com/contaminants/pfas/washington/

BibTeX

@misc{zipcheckup-contaminants-pfas-washington,
  author = {{ZipCheckup}},
  title  = {{PFAS in Washington Drinking Water — 0 Violations}},
  year   = {2026},
  url    = {https://zipcheckup.com/contaminants/pfas/washington/}
}

Page version: August 2026.