Aquarion-Plainville Regional
PWSID CT1100011 · Shelton, Connecticut · serves 18,231 people · groundwater source
F
Failing
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFOS | 6.8 ppt | 4 ppt | 2/13/2023 |
| PFBA | 6.4 ppt | — | 8/8/2023 |
| PFBA | 6.3 ppt | — | 2/13/2023 |
| PFOS | 6.2 ppt | 4 ppt | 8/8/2023 |
| PFOA | 5.2 ppt | 4 ppt | 2/13/2023 |
| PFOA | 4.7 ppt | 4 ppt | 8/8/2023 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2026-02-01 | Groundwater Rule | TT | Yes | Resolved |