Acton Water Supply District
PWSID MA2002000 · Acton, Massachusetts · serves 21,285 people · surface water source
F
Failing
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFBA | 20.6 ppt | — | 9/21/2023 |
| PFBA | 18.3 ppt | — | 1/5/2024 |
| PFBA | 14.1 ppt | — | 6/28/2023 |
| PFOA | 13.4 ppt | 4 ppt | 6/28/2023 |
| PFOA | 11.9 ppt | 4 ppt | 9/21/2023 |
| PFBA | 11.8 ppt | — | 3/15/2023 |
| PFOA | 11.3 ppt | 4 ppt | 3/15/2023 |
| PFOA | 9.6 ppt | 4 ppt | 1/5/2024 |
| PFPeA | 8.4 ppt | — | 12/6/2023 |
| PFPeA | 8.1 ppt | — | 6/5/2023 |
| PFPeA | 8.1 ppt | — | 9/18/2023 |
| PFOA | 7.3 ppt | 4 ppt | 9/18/2023 |
| PFOA | 7.2 ppt | 4 ppt | 12/6/2023 |
| PFOA | 7.1 ppt | 4 ppt | 6/5/2023 |
| PFHxA | 7.1 ppt | — | 6/5/2023 |
| PFHxA | 6.6 ppt | — | 12/6/2023 |
| PFPeA | 6.4 ppt | — | 3/15/2023 |
| PFHxA | 6.3 ppt | — | 9/18/2023 |
| PFOA | 6.1 ppt | 4 ppt | 3/15/2023 |
| PFHxA | 5.8 ppt | — | 6/28/2023 |
| PFHxA | 5.5 ppt | — | 3/15/2023 |
| PFHxA | 5.4 ppt | — | 9/21/2023 |
| PFHxA | 5.2 ppt | — | 3/15/2023 |
| PFHpA | 5.2 ppt | — | 6/28/2023 |
| PFOA | 5.1 ppt | 4 ppt | 3/13/2023 |
| PFPeA | 4.9 ppt | — | 6/28/2023 |
| PFPeA | 4.9 ppt | — | 1/5/2024 |
| PFOS | 4.9 ppt | 4 ppt | 3/13/2023 |
| PFHpA | 4.8 ppt | — | 9/21/2023 |
| PFHxA | 4.7 ppt | — | 1/5/2024 |
| PFOS | 4.7 ppt | 4 ppt | 9/18/2023 |
| PFOS | 4.7 ppt | 4 ppt | 12/6/2023 |
| PFOA | 4.7 ppt | 4 ppt | 9/25/2023 |
| PFHpA | 4.6 ppt | — | 3/15/2023 |
| PFPeA | 4.6 ppt | — | 9/21/2023 |
| PFOS | 4.6 ppt | 4 ppt | 6/5/2023 |
| PFPeA | 4.4 ppt | — | 3/15/2023 |
| PFOS | 4.2 ppt | 4 ppt | 3/15/2023 |
| PFOS | 4.2 ppt | 4 ppt | 9/25/2023 |
| PFHpA | 3.8 ppt | — | 1/5/2024 |
| PFBS | 3.7 ppt | — | 6/5/2023 |
| PFBS | 3.6 ppt | — | 12/6/2023 |
| PFBS | 3.5 ppt | — | 3/13/2023 |
| PFBS | 3.4 ppt | — | 9/18/2023 |
| PFHxS | 3.2 ppt | 10 ppt | 3/15/2023 |
| PFBS | 3.2 ppt | — | 3/15/2023 |
| PFHxA | 3 ppt | — | 3/13/2023 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2024-03-01 | Revised Total Coliform Rule | MON | No | Resolved |
| 2023-10-01 | Benzene | MR | No | Resolved |
| 2023-10-01 | Carbon tetrachloride | MR | No | Resolved |
| 2023-10-01 | 1,1-Dichloroethylene | MR | No | Resolved |
| 2023-10-01 | 1,2-Dichloroethane | MR | No | Resolved |
| 2023-10-01 | Trichloroethylene | MR | No | Resolved |
| 2023-10-01 | 1,1,1-Trichloroethane | MR | No | Resolved |
| 2023-10-01 | Vinyl chloride | MR | No | Resolved |
| 2023-10-01 | CHLOROBENZENE | MR | No | Resolved |
| 2023-10-01 | o-Dichlorobenzene | MR | No | Resolved |
| 2023-10-01 | trans-1,2-Dichloroethylene | MR | No | Resolved |
| 2023-10-01 | cis-1,2-Dichloroethylene | MR | No | Resolved |
| 2023-10-01 | 1,2-Dichloropropane | MR | No | Resolved |
| 2023-10-01 | Ethylbenzene | MR | No | Resolved |
| 2023-10-01 | Styrene | MR | No | Resolved |
| 2023-10-01 | Tetrachloroethylene | MR | No | Resolved |
| 2023-10-01 | Toluene | MR | No | Resolved |
| 2023-10-01 | p-Dichlorobenzene | MR | No | Resolved |
| 2023-10-01 | Xylenes, Total | MR | No | Resolved |
| 2023-10-01 | DICHLOROMETHANE | MR | No | Resolved |
| 2023-10-01 | 1,1,2-Trichloroethane | MR | No | Resolved |
| 2023-10-01 | 1,2,4-Trichlorobenzene | MR | No | Resolved |