CALISTOGA, CITY OF
PWSID: CA2810002 · CALISTOGA, CA · Serving 5,610 people
Type: CWSOwner: LSource: 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
12.2 ppt
Highest single detection
2024-08-13
Latest sample date
All PFAS detection results
Source: EPA UCMR5 (UCMR5) · 232 compounds tested
| Contaminant | Result (ppt) | MCL (ppt) | Status | Sample date |
|---|
| 4:2 FTS | ND | — | Below MRL | 2025-04-08 |
| PFUnA | ND | — | Below MRL | 2024-06-04 |
| 11Cl-PF3OUdS | ND | — | Below MRL | 2024-06-04 |
| 9Cl-PF3ONS | ND | — | Below MRL | 2024-06-04 |
| ADONA | ND | — | Below MRL | 2024-06-04 |