CITY OF FRESNO
High Risk3 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.
10
PFAS Detected
3
Above EPA Limits
17
ZIPs Served
Groundwater
Water Source
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 30.00ppt | 750% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 16.00ppt | 400% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 30.00ppt | 300% of limit
| 10 ppt | ⚠ Exceeds MCL |
PFNA Perfluorononanoic acid | 8.00ppt | 80% of limit
| 10 ppt | Below limit |
PFPeA Perfluoropentanoic acid | 47.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 34.00ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 31.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 26.00ppt | No federal limit | — | Unregulated |
Show 2 more compounds detected at low levels
| PFBSPerfluorobutane sulfonic acid | 8.60 ppt | No federal limit |
| PFPeS | 5.30 ppt | No federal limit |
ZIP Codes Served by This Utility
93701 93702 93703 93704 93705 93706 93710 93711 93720 93721 93722 93723 93725 93726 93727 93728 93730
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About this data
Source
EPA UCMR 5 — January 2026 release
Sampling period
January 2023 – December 2025
Water system ID (PWSID)
CA1010007
Detection threshold (MRL)
~1.5–2 ppt — "Not detected" means below this floor