Allegheny County tap water
2 of 26 water systems serving Allegheny County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 39 community water systems list this county as served; 25 serve 3,300+ people with full PFAS testing.
- 15 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 |
|---|---|---|---|---|
| PA Amer Water Co-Pittsburgh | Surface water | 686,000 | No | 0 |
| Pittsburgh Water & Sewer Auth | Surface water | 520,000 | No | 0 |
| West View Water Authority | Surface water | 200,000 | No | 0 |
| Wilkinsburg-Penn Jt Water Auth | Surface water | 125,000 | No | 2 |
| Hampton Shaler Water Authority | Purchased surface water | 61,949 | No | 0 |
| Monroeville Municipal Auth | Purchased surface water | 48,500 | No | 1 |
| Oakmont Water Authority | Surface water | 39,901 | No | 0 |
| Moon Twp Muni Auth | Surface water | 38,000 | Yes | 1 |
| West Cnty Muni Auth-Mckeesport | Surface water | 32,644 | No | 0 |
| Plum Boro Muni Auth | Purchased surface water | 27,500 | No | 1 |
| Western Allegheny County Mun A | Purchased surface water | 19,031 | No | 2 |
| Fox Chapel Auth | Purchased surface water | 18,500 | 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.