Montgomery County tap water
3 of 15 water systems serving Montgomery County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 23 community water systems list this county as served; 14 serve 3,300+ people with full PFAS testing.
- 5 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 |
|---|---|---|---|---|
| Montgomery County Water Services 1 PWS | Purchased surface water | 150,207 | Yes | 0 |
| Dayton Public Water System | Surface water | 141,407 | Yes | 0 |
| Montgomery County Water Services 2 PWS | Purchased surface water | 83,033 | No | 0 |
| Huber Heights Public Water System | Groundwater | 43,439 | No | 0 |
| Miamisburg City PWS | Groundwater | 19,790 | No | 0 |
| Englewood City PWS | Groundwater | 13,463 | No | 0 |
| Oakwood City PWS | Groundwater | 9,572 | No | 0 |
| Trotwood City PWS | Purchased surface water | 9,000 | No | 0 |
| West Carrollton City PWS | Groundwater | 8,361 | No | 1 |
| Union City PWS | Groundwater | 7,000 | No | 0 |
| Brookville Municipality PWS | Purchased surface water | 5,923 | No | 0 |
| Germantown City PWS | Groundwater | 5,547 | 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.