CALIFORNIA WATER SERVICE - SAN MATEO
PWSID: CA4110008 · SAN JOSE, CA · Serving 102,348 people
Type: CWSOwner: PSource: SW
Compliant
All PFAS compounds below EPA Maximum Contaminant Levels.
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
N/A ppt
Highest single detection
2024-08-15
Latest sample date
All PFAS detection results
Source: EPA UCMR5 (UCMR5) · 116 compounds tested
| Contaminant | Result (ppt) | MCL (ppt) | Status | Sample date |
|---|
| ADONA | ND | — | Below MRL | 2024-05-16 |
| PFMBA | ND | — | Below MRL | 2024-05-16 |
| PFPeA | ND | — | Below MRL | 2024-05-16 |
| PFMPA | ND | — | Below MRL | 2024-05-16 |
| PFPeS | ND | — | Below MRL | 2024-05-16 |