PFAS in Seattle, WA Drinking Water
PFAS data for Seattle, Washington · 994,393 residents · 36 ZIP codes
ZipCheckup's reading of PFAS in Seattle, Washington: PFAS carries a high health-risk designation.
Water quality records for Seattle, Washington show PFAS detections on file - a finding that places it among the contaminants worth tracking for this area.
Data: EPA SDWIS, CCR Reports, ECHO
PFAS in Seattle Tap Water
This analysis covers 994,393 residents across 36 ZIP codes in Seattle.
Is PFAS in Seattle Water Safe?
PFAS was detected in Seattle water, but the available unit could not be normalized to the EPA MCL. ZipCheckup therefore cannot classify the result as within or above the federal limit.
Check the source utility record and consider independent testing before making a safety decision.
Health Effects of PFAS
- Increased risk of kidney and testicular cancer
- Thyroid disease and immune system suppression
- Reproductive problems and reduced fertility
- Elevated cholesterol and liver effects
- Developmental effects in infants and children
Health risk severity: High. Governed by the PFAS National Primary Drinking Water Regulation (2024).
How PFAS Gets Into Drinking Water
- Firefighting foam (AFFF) used at military bases and airports
- Industrial manufacturing (non-stick coatings, stain-resistant fabrics)
- Wastewater treatment plants that receive industrial discharge
- Landfill leachate from PFAS-containing consumer products
What to Do About PFAS in Seattle Water
- Install a reverse osmosis system (most effective — removes 90%+ of PFAS)
- Granular activated carbon (GAC) filters remove some PFAS compounds
- Look for NSF 53 or NSF 58 certification specifically tested for PFAS
- Pitcher filters with activated carbon provide partial reduction
Look for filters certified under NSF 53 / NSF 58 for pfas removal.