York County tap water
6 of 12 water systems serving York County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 45 community water systems list this county as served; 12 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 |
|---|---|---|---|---|
| York Water CO | Surface water | 206,762 | No | 1 |
| Hanover Muni Water Works | Surface water | 40,900 | No | 0 |
| Dover Twp Water Sys | Purchased surface water | 21,097 | Yes | 0 |
| Red Lion Municipal Authority | Surface water | 15,882 | No | 0 |
| Dallastown Yoe Water Auth | Purchased surface water | 12,300 | No | 0 |
| West Manchester Twp Auth | Groundwater | 9,960 | Yes | 0 |
| Dillsburg Area Authority | Groundwater | 8,962 | Yes | 0 |
| Veolia Newberry System | Groundwater | 6,480 | Yes | 0 |
| Stewartstown Boro Water Auth | Purchased surface water | 5,206 | Yes | 0 |
| Shrewsbury Borough | Groundwater | 4,727 | Yes | 0 |
| New Freedom Boro Water Auth | Purchased surface water | 4,464 | No | 0 |
| Wrightsville Boro Muni Auth | Surface water | 4,076 | 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.