SAN JOSE WATER
High Risk1 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.
3
PFAS Detected
1
Above EPA Limits
30
ZIPs Served
Groundwater
Water Source
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 6.20ppt | 155% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 5.50ppt | 55% of limit
| 10 ppt | Below limit |
lithium | 10000.00ppt | No federal limit | — | Unregulated |
ZIP Codes Served by This Utility
95008 95014 95030 95032 95033 95050 95070 95110 95111 95112 95113 95116 95117 95118 95120 95121 95122 95123 95124 95125 95126 95127 95128 95129 95130 95131 95132 95133 95136 95148
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)
CA4310011
Detection threshold (MRL)
~1.5–2 ppt — "Not detected" means below this floor