Sonoma, City Of
PWSID CA4910012 · Sonoma, California · serves 10,619 people · groundwater source
D
Poor
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFOA | 6.2 ppt | 4 ppt | 1/16/2024 |
| PFHxA | 6.1 ppt | — | 1/16/2024 |
| PFHxA | 4.3 ppt | — | 7/19/2023 |
| PFOA | 4 ppt | 4 ppt | 7/19/2023 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2025-07-02 | LEAD AND COPPER RULE REVISIONS | RPT | No | Unaddressed |