PA AMERICAN WATER CO WEST
High Risk2 PFAS compound(s) exceed EPA Maximum Contaminant Levels
This utility has until 2029 to install treatment under the EPA's April 2024 PFAS rule. In the meantime, a point-of-use filter certified NSF/ANSI 58 for PFOA/PFOS provides reliable interim protection.
4
PFAS Detected
2
Above EPA Limits
21
ZIPs Served
Surface
Water Source
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 10.40ppt | 260% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 4.90ppt | 123% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFPeA Perfluoropentanoic acid | 3.40ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.20ppt | No federal limit | — | Unregulated |
ZIP Codes Served by This Utility
15101 17001 17011 17015 17025 17043 17050 17055 17067 17070 17072 17074 17078 17093 17105 17317 17319 17339 17370 17575 18706
Click any ZIP to see the full result page for that area.
About this data
Source
EPA UCMR 5 — January 2026 release
Sampling period
January 2023 – December 2025
Water system ID (PWSID)
PA7210029
Detection threshold (MRL)
~1.5–2 ppt — "Not detected" means below this floor