Wellesley Water Division
PWSID MA3317000 · Wellesley, Massachusetts · serves 29,550 people · surface water source
D
Poor
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFOS | 6.6 ppt | 4 ppt | 7/23/2025 |
| PFOS | 6.4 ppt | 4 ppt | 1/21/2025 |
| PFOA | 6.3 ppt | 4 ppt | 1/21/2025 |
| PFOA | 6.2 ppt | 4 ppt | 7/23/2025 |
| PFBS | 5.3 ppt | — | 7/23/2025 |
| PFOA | 5.2 ppt | 4 ppt | 1/21/2025 |
| PFBA | 5.2 ppt | — | 7/23/2025 |
| PFOA | 4.7 ppt | 4 ppt | 7/23/2025 |
| PFBS | 4.6 ppt | — | 1/21/2025 |
| PFPeA | 4.3 ppt | — | 7/23/2025 |
| PFHxA | 3.9 ppt | — | 1/21/2025 |
| PFBS | 3.7 ppt | — | 1/21/2025 |
| PFHxA | 3.6 ppt | — | 7/23/2025 |
| PFPeA | 3.5 ppt | — | 1/21/2025 |
| PFPeA | 3.5 ppt | — | 1/21/2025 |
| PFHxA | 3.3 ppt | — | 7/23/2025 |
| PFPeA | 3.1 ppt | — | 7/23/2025 |
| PFBS | 3.1 ppt | — | 7/23/2025 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2022-07-01 | Lead and Copper Rule | MR | No | Addressed |