PFAS in Wilmington, DE Drinking Water
PFAS data for Wilmington, Delaware · 219,376 residents · 26 ZIP codes
ZipCheckup's reading of PFAS in Wilmington, Delaware: the highest detected level is 0.106 ppt; the EPA limit is 4 ppt (PFOA/PFOS individually). PFAS carries a high health-risk designation.
At elevated levels, PFAS is a recognized health concern in drinking water; in Wilmington, Delaware, it has been detected in recent samples logged through federal compliance reporting.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-07-13
PFAS in Wilmington Tap Water
PFAS has been detected in Wilmington, Delaware drinking water at a maximum level of 0.106 detections — relative to the EPA MCL of 4 ppt (PFOA/PFOS individually).
This analysis covers 219,376 residents across 26 ZIP codes in Wilmington.
Wilmington's overall water quality grade is B (80/100).
Is PFAS in Wilmington 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 |
|---|---|---|---|
| 19804 | 175 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
| 19805 | 116 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
| 19801 | 99 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
| 19802 | 99 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
| 19803 | 99 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
| 19809 | 99 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
| 19810 | 99 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
| 19806 | 40 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
| 19807 | 40 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
| 19808 | 40 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
| 19850 | 40 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
| 19880 | 40 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
| 19884 | 40 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
| 19898 | 40 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
| 19899 | 40 detections | 4 ppt (PFOA/PFOS individually) | Not comparable |
Average pfas level across Wilmington: 73.73 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 Wilmington 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.