PHILADELPHIA WATER DEPARTMENT
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.
8
PFAS Detected
2
Above EPA Limits
48
ZIPs Served
Surface
Water Source
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 8.10ppt | 203% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 6.00ppt | 150% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFNA Perfluorononanoic acid | 4.50ppt | 45% of limit
| 10 ppt | Below limit |
PFBS Perfluorobutane sulfonic acid | 10.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 9.90ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 9.10ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 7.60ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 3.30ppt | No federal limit | — | Unregulated |
ZIP Codes Served by This Utility
19102 19103 19104 19106 19107 19111 19112 19113 19114 19115 19116 19118 19119 19120 19121 19122 19123 19124 19125 19126 19127 19128 19129 19130 19131 19132 19133 19134 19135 19136 19137 19138 19139 19140 19141 19142 19143 19144 19145 19146 19147 19148 19149 19150 19151 19152 19153 19154
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About this data
Source
EPA UCMR 5 — January 2026 release
Sampling period
January 2023 – December 2025
Water system ID (PWSID)
PA1510001
Detection threshold (MRL)
~1.5–2 ppt — "Not detected" means below this floor