Hyannis Water System, Town Of Barnstable
PWSID MA4020004 · Hyannis, Massachusetts · serves 35,000 people · groundwater source
B
Good
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFPeA | 29.8 ppt | — | 5/16/2023 |
| PFPeA | 18.7 ppt | — | 11/15/2023 |
| PFBA | 16.8 ppt | — | 5/16/2023 |
| PFBA | 11.5 ppt | — | 11/15/2023 |
| PFBA | 9.3 ppt | — | 4/9/2024 |
| PFHxA | 6.5 ppt | — | 11/15/2023 |
| PFHxA | 5.8 ppt | — | 5/16/2023 |
| PFPeA | 5.1 ppt | — | 4/9/2024 |
| PFPeA | 4.3 ppt | — | 5/16/2023 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2025-04-01 | Total Haloacetic Acids (HAA5) | MR | No | Archived |
| 2025-04-01 | TTHM | MR | No | Archived |