PFAS in Danbury, CT Drinking Water
PFAS data for Danbury, Connecticut · 63,789 residents · 6 ZIP codes
Recent water testing in Danbury, Connecticut has returned PFAS readings above detection thresholds.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-05-14
PFAS in Danbury Tap Water
PFAS has been detected in Danbury, Connecticut drinking water at a maximum level of 5.4 ppt — 1.35x the EPA MCL.
This analysis covers 63,789 residents across 6 ZIP codes in Danbury.
Danbury's overall water quality grade is C (65/100).
Is PFAS in Danbury Water Safe?
If you live in an affected ZIP code, consider installing a reverse osmosis or granular activated carbon filter certified under NSF 53 / NSF 58 and testing your water independently.
PFAS Levels by ZIP Code
| ZIP Code | PFAS Level | EPA Limit | Status |
|---|---|---|---|
| 06810 | 16 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 06811 | 16 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 06810 | 5.4 ppt | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 06811 | 5.4 ppt | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 06813 | 5.4 ppt | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 06814 | 5.4 ppt | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 06816 | 5.4 ppt | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 06817 | 5.4 ppt | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 06810 | 2.7 ppt | 4 ppt (PFOA/PFOS individually) | OK |
| 06811 | 2.7 ppt | 4 ppt (PFOA/PFOS individually) | OK |
| 06813 | 2.7 ppt | 4 ppt (PFOA/PFOS individually) | OK |
| 06814 | 2.7 ppt | 4 ppt (PFOA/PFOS individually) | OK |
| 06816 | 2.7 ppt | 4 ppt (PFOA/PFOS individually) | OK |
| 06817 | 2.7 ppt | 4 ppt (PFOA/PFOS individually) | OK |
Average pfas level across Danbury: 5.76 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 Danbury 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.