Norwalk First Taxing District
PWSID CT1030011 · Norwalk, Connecticut · serves 40,256 people · surface water source
D
Poor
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFOS | 11.2 ppt | 4 ppt | 6/25/2024 |
| PFOA | 9.5 ppt | 4 ppt | 6/25/2024 |
| PFOS | 8.9 ppt | 4 ppt | 4/2/2024 |
| PFOA | 7.9 ppt | 4 ppt | 4/2/2024 |
| PFBS | 6.4 ppt | — | 4/2/2024 |
| PFBS | 6.4 ppt | — | 6/25/2024 |
| PFPeA | 5.4 ppt | — | 6/25/2024 |
| PFHxA | 4.8 ppt | — | 6/25/2024 |
| PFPeA | 4.5 ppt | — | 4/2/2024 |
| PFOA | 4.3 ppt | 4 ppt | 11/1/2023 |
| PFHxS | 4.2 ppt | 10 ppt | 6/25/2024 |
| PFOA | 4.2 ppt | 4 ppt | 8/14/2024 |
| PFOA | 4.1 ppt | 4 ppt | 9/10/2024 |
| PFHxS | 3.5 ppt | 10 ppt | 4/2/2024 |
| PFHxA | 3.1 ppt | — | 4/2/2024 |
| PFPeA | 3 ppt | — | 9/10/2024 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2021-12-30 | Lead and Copper Rule | MR | No | Resolved |