PFAS in Greenlawn, NY Drinking Water
PFAS data for Greenlawn, New York · 42,000 residents · 1 ZIP code
Routine testing in Greenlawn, New York 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 Greenlawn Tap Water
PFAS has been detected in Greenlawn, New York drinking water at a maximum level of 6.4 ppt — 1.6x the EPA MCL.
This analysis covers 42,000 residents across 1 ZIP code in Greenlawn.
Greenlawn's overall water quality grade is B (83/100).
Is PFAS in Greenlawn Water Safe?
PFAS was detected in Greenlawn 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 |
|---|---|---|---|
| 11740 | 6.4 ng/L | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 11740 | 4 detections | 4 ppt (PFOA/PFOS individually) | OK |
Average pfas level across Greenlawn: 5.2 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 Greenlawn 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.