LOUISVILLE WATER COMPANY
PWS ID: KY0560258 · LOUISVILLE, Kentucky 40202
PFAS Detected
4 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
764,769
Total Violations
660
Health-Based Violations
38
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 311,310
- County
- Jefferson
- School/Daycare
- No
- MCL Violations
- 38
- Monitoring Violations
- 418
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Thallium, Total | MR | 26 | 1999 |
| Coliform (TCR) | MCL | 24 | 1997 |
| Coliform (TCR) | MR | 21 | 2004 |
| Beryllium, Total | MR | 14 | 1999 |
| Cadmium | MR | 14 | 1999 |
| Nitrate | MR | 12 | 1998 |
| Dalapon | MR | 12 | 1996 |
| Picloram | MR | 12 | 1996 |
| Dinoseb | MR | 12 | 1996 |
| Aldicarb sulfone | MR | 12 | 1996 |
| Aldicarb | MR | 12 | 1996 |
| Pentachlorophenol | MR | 12 | 1996 |
| Vinyl chloride | MR | 12 | 1996 |
| 1,2-Dichloroethane | MR | 12 | 1996 |
| 1,1,1-Trichloroethane | MR | 12 | 1996 |
| Carbon tetrachloride | MR | 12 | 1996 |
| Trichloroethylene | MR | 12 | 1996 |
| Aldicarb sulfoxide | MR | 12 | 1996 |
| Carbofuran | MR | 12 | 1996 |
| 1,1-Dichloroethylene | MR | 12 | 1996 |
| OXAMYL | MR | 12 | 1996 |
| p-Dichlorobenzene | MR | 12 | 1996 |
| Benzene | MR | 12 | 1996 |
| Mercury | MR | 11 | 1996 |
| Selenium | MR | 6 | 1996 |
| Thallium, Total | MCL | 6 | 1997 |
| 1,2,4-Trichlorobenzene | MR | 6 | 1996 |
| cis-1,2-Dichloroethylene | MR | 6 | 1996 |
| DICHLOROMETHANE | MR | 6 | 1996 |
| trans-1,2-Dichloroethylene | MR | 6 | 1996 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 6 of 180 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFOA | 9/27/2023 | 0.0075 µg/L | 0.004 µg/L | Detected |
| PFOS | 9/27/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFNA | 9/27/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxS | 9/27/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 9/27/2023 | 0.0030 µg/L | 0.003 µg/L | Detected |
| PFDA | 9/27/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 9/27/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBA | 9/27/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMBA | 9/27/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 9/27/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 9/27/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 9/27/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 9/27/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 9/27/2023 | 0.0039 µg/L | 0.003 µg/L | Detected |
| PFDoA | 9/27/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFEESA | 9/27/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 9/27/2023 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFPeS | 9/27/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFUnA | 9/27/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHxA | 9/27/2023 | 0.0034 µg/L | 0.003 µg/L | Detected |
| PFHpS | 9/27/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 11Cl-PF3OUdS | 9/27/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 9Cl-PF3ONS | 9/27/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| HFPO-DA | 9/27/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| ADONA | 9/27/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTA | 8/16/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| NMeFOSAA | 8/16/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFTrDA | 8/16/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NEtFOSAA | 8/16/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| lithium | 8/16/2023 | <9 µg/L | 9 µg/L | Not Detected |
| PFMBA | 8/16/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 8/16/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| NMeFOSAA | 8/16/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| NEtFOSAA | 8/16/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 8/16/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFTA | 8/16/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFHpS | 8/16/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 8/16/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| NFDHA | 8/16/2023 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFEESA | 8/16/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeA | 8/16/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 8/16/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 8/16/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 8/16/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 8/16/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| HFPO-DA | 8/16/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| lithium | 8/16/2023 | <9 µg/L | 9 µg/L | Not Detected |
| 11Cl-PF3OUdS | 8/16/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFUnA | 8/16/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHxA | 8/16/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
PFAS data from EPA UCMR5 monitoring program (2023-2025).
This data is provided for informational purposes only.