PFAS in Snohomish, WA Drinking Water
PFAS data for Snohomish, Washington · 66,933 residents · 3 ZIP codes
ZipCheckup's reading of PFAS in Snohomish, Washington: the highest detected level is 0.0094 ppt; the EPA limit is 4 ppt (PFOA/PFOS individually). PFAS carries a high health-risk designation.
Across the water systems that serve Snohomish, Washington, PFAS has appeared in EPA compliance samples - standard municipal treatment targets this contaminant, though detections in the compliance record indicate it has reached household taps at measurable levels.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-07-13
PFAS in Snohomish Tap Water
PFAS has been detected in Snohomish, Washington drinking water at a maximum level of 0.0094 detections — relative to the EPA MCL of 4 ppt (PFOA/PFOS individually).
This analysis covers 66,933 residents across 3 ZIP codes in Snohomish.
Snohomish's overall water quality grade is B (84/100).
Is PFAS in Snohomish Water Safe?
PFAS was detected in Snohomish water but currently falls within EPA limits. However, some health organizations argue the EPA MCL may not be protective enough.
If you are concerned, a reverse osmosis or granular activated carbon filter can reduce pfas levels further.
PFAS Levels by ZIP Code
| ZIP Code | PFAS Level | EPA Limit | Status |
|---|---|---|---|
| 98296 | 6 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
Average pfas level across Snohomish: 6 ppt
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 Snohomish 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.