PFAS in Louisville, KY Drinking Water
PFAS data for Louisville, Kentucky · 764,769 residents · 66 ZIP codes
Across the water systems that serve Louisville, Kentucky, 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: 2026-05-14
PFAS in Louisville Tap Water
PFAS has been detected in Louisville, Kentucky drinking water at a maximum level of 0.0107 ppt — below the EPA MCL of 4 ppt (PFOA/PFOS individually).
This analysis covers 764,769 residents across 66 ZIP codes in Louisville.
Louisville's overall water quality grade is C (64/100).
Is PFAS in Louisville 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 |
|---|---|---|---|
| 40233 | 17 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40291 | 9 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40299 | 9 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40245 | 8 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40202 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40203 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40204 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40205 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40206 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40207 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40208 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40209 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40210 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40211 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40212 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40213 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40214 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40215 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40216 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40217 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40218 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40219 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40220 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40222 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| 40223 | 6 detections | 4 ppt (PFOA/PFOS individually) | Exceeds limit |
| ...9 more ZIP codes |
Average pfas level across Louisville: 6.56 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 Louisville 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.