Franklin County tap water
0 of 13 water systems serving Franklin County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 31 community water systems list this county as served; 11 serve 3,300+ people with full PFAS testing.
- 7 had a health-based violation since 2021-10-26.
Largest systems serving this county
| System | Source | People served (whole system) | PFAS above a 2024 level? | Violations since 2021-10-26 |
|---|---|---|---|---|
| Columbus Public Water System | Surface water | 1,309,468 | No | 0 |
| Westerville City PWS | Surface water | 39,000 | No | 0 |
| Reynoldsburg City PWS | Purchased surface water | 37,847 | No | 0 |
| Gahanna City PWS | Purchased surface water | 33,258 | No | 0 |
| Bexley City PWS | Purchased surface water | 14,250 | No | 0 |
| Jefferson Water and Sewer District PWS | Groundwater | 11,294 | No | 0 |
| Canal Winchester City PWS | Groundwater | 9,286 | No | 0 |
| Sanitary District #4 | Purchased surface water | 8,575 | No | 1 |
| Aqua Ohio - Blacklick | Groundwater | 7,100 | No | 0 |
| Aqua Ohio - Huber Ridge PWS | Groundwater | 5,393 | No | 0 |
| Aqua Ohio - Lake Darby | Groundwater | 3,562 | No | 0 |
Which one is yours? A county usually has several utilities. Your bill or your utility's annual water-quality report names yours. Population is for the whole system, which can cross county lines.
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.