CALIFORNIA WATER SERVICE - STOCKTON
PWSID: CA3910001 · SAN JOSE, CA · Serving 176,266 people
Type: CWSOwner: PSource: SW
Settlement eligible
Settlement details
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Upgrade to ProExceeds MCL
One or more PFAS compounds exceed EPA Maximum Contaminant Levels. Corrective action required by 2031.
Key contaminants vs MCL
EPA MCL: 4 ppt (parts per trillion) for PFOA and PFOS individually. Compliance deadline: 2031-12-31
Exact contamination levels
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Upgrade to ProDetection summary
5.2 ppt
Highest single detection
2025-09-09
Latest sample date
All PFAS detection results
Source: EPA UCMR5 (UCMR5) · 1000 compounds tested
| Contaminant | Result (ppt) | MCL (ppt) | Status | Sample date |
|---|
| PFBS | ND | — | Below MRL | 2025-07-15 |
| PFMBA | ND | — | Below MRL | 2025-08-07 |
| PFPeS | ND | — | Below MRL | 2025-01-08 |
| PFHpS | ND | — | Below MRL | 2025-07-15 |
| NEtFOSAA | ND | — | Below MRL | 2025-01-08 |