Kentucky tap water
9 of 229 Kentucky water systems with full PFAS testing (4%) averaged above a 2024 federal PFAS level at one or more sampling points.
- 372 active community water systems in the EPA file; 217 serve 3,300+ people and have a full PFAS set.
- 82 systems had at least one health-based violation since 2021-10-26.
- 1 systems report a lead 90th percentile above 15 ppb (some results are old; check each system page).
Largest systems
| System | People served | PFAS above a 2024 level? | Health-based violations since 2021-10-26 |
|---|---|---|---|
| Louisville Water Company | 806,997 | No | 0 |
| Kentucky-American Water CO | 669,042 | No | 0 |
| Northern Kentucky Water District | 259,949 | No | 0 |
| Warren County Water District | 91,118 | No | 0 |
| Hardin County Water District #2 | 76,326 | No | 0 |
| Boone CO Water & Sewer District | 66,300 | No | 0 |
| Paducah Water Works | 65,004 | Yes, at one or more sampling points | 0 |
| Owensboro Municipal Utilities | 60,473 | No | 0 |
All 14 utilities with a page in Kentucky
- Ashland Water Works 44,402
- Boone CO Water & Sewer District 66,300
- Bowling Green Municipal Utilities 53,601
- Frankfort Plant Board 52,153
- Georgetown Municipal Water Service 44,608
- Hardin County Water District #2 76,326
- Hopkinsville Water Environment Authority 41,350
- Kentucky-American Water CO 669,042
- Louisville Water Company 806,997
- Mountain Water Dist 44,057
- Northern Kentucky Water District 259,949
- Owensboro Municipal Utilities 60,473
- Paducah Water Works 65,004
- Warren County Water District 91,118
Why not "the state's water quality"? You drink from one utility, not a state. Rollups count systems, not people, so one large utility counts the same as a small one. Use the system pages for your actual water.
Not medical or legal advice. UCMR 5 results are screening data, not compliance determinations.
Sources and freshness
Public-water-system facts, violations and lead/copper results: EPA ECHO SDWA download (SDWIS snapshot 2026-10-13). PFAS and lithium results: EPA UCMR 5 final data (sampling 2023–2025). Both are U.S. government works, downloaded 2026-10-26. Numbers are computed by the published method; the same fields are in the open data files.