PFAS in Bothell, WA Drinking Water
PFAS data for Bothell, Washington · 90,682 residents · 4 ZIP codes
Routine testing in Bothell, Washington turned up PFAS — samples from the public supply came back positive, placing this contaminant on the list of substances residents here have a concrete reason to look into.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-05-14
PFAS in Bothell Tap Water
PFAS has been detected in Bothell, Washington drinking water at a maximum level of 0.0094 ppt — below the EPA MCL of 4 ppt (PFOA/PFOS individually).
This analysis covers 90,682 residents across 4 ZIP codes in Bothell.
Bothell's overall water quality grade is B (84/100).
Is PFAS in Bothell Water Safe?
PFAS was detected in Bothell 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 |
|---|---|---|---|
| 98012 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
Average pfas level across Bothell: 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 Bothell 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.