Westborough Water Department
PWSID MA2328000 · Westborough, Massachusetts · serves 21,567 people · surface water source
F
Failing
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFOS | 7.5 ppt | 4 ppt | 5/16/2023 |
| PFOA | 5.8 ppt | 4 ppt | 5/16/2023 |
| PFOA | 4 ppt | 4 ppt | 1/22/2024 |
| PFBS | 3.4 ppt | — | 7/12/2023 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2025-11-01 | Surface Water Treatment Rule | TT | Yes | Resolved |
| 2025-08-01 | TTHM | MR | No | Archived |
| 2025-08-01 | Total Haloacetic Acids (HAA5) | MR | No | Archived |
| 2023-10-01 | Lead and Copper Rule | MR | No | Resolved |
| 2023-07-01 | Arsenic | MR | No | Resolved |
| 2023-04-01 | Ethylbenzene | MR | No | Archived |
| 2023-04-01 | Styrene | MR | No | Archived |
| 2023-04-01 | Tetrachloroethylene | MR | No | Archived |
| 2023-04-01 | Toluene | MR | No | Archived |
| 2023-04-01 | p-Dichlorobenzene | MR | No | Archived |
| 2023-04-01 | Xylenes, Total | MR | No | Archived |
| 2023-04-01 | DICHLOROMETHANE | MR | No | Archived |
| 2023-04-01 | 1,1,2-Trichloroethane | MR | No | Archived |
| 2023-04-01 | 1,2,4-Trichlorobenzene | MR | No | Archived |
| 2023-04-01 | Benzene | MR | No | Archived |
| 2023-04-01 | Carbon tetrachloride | MR | No | Archived |
| 2023-04-01 | 1,1-Dichloroethylene | MR | No | Archived |
| 2023-04-01 | 1,2-Dichloroethane | MR | No | Archived |
| 2023-04-01 | Trichloroethylene | MR | No | Archived |
| 2023-04-01 | 1,1,1-Trichloroethane | MR | No | Archived |
| 2023-04-01 | Vinyl chloride | MR | No | Archived |
| 2023-04-01 | CHLOROBENZENE | MR | No | Archived |
| 2023-04-01 | o-Dichlorobenzene | MR | No | Archived |
| 2023-04-01 | trans-1,2-Dichloroethylene | MR | No | Archived |
| 2023-04-01 | cis-1,2-Dichloroethylene | MR | No | Archived |
| 2023-04-01 | 1,2-Dichloropropane | MR | No | Archived |
| 2023-02-01 | Revised Total Coliform Rule | MON | No | Resolved |
| 2022-10-01 | LASSO | MR | No | Resolved |
| 2022-10-01 | Atrazine | MR | No | Resolved |
| 2022-10-01 | Carbofuran | MR | No | Resolved |
| 2022-10-01 | Chlordane | MR | No | Resolved |
| 2022-10-01 | 2,4-D | MR | No | Resolved |
| 2022-10-01 | Endrin | MR | No | Resolved |
| 2022-10-01 | ETHYLENE DIBROMIDE | MR | No | Resolved |
| 2022-10-01 | Heptachlor epoxide | MR | No | Resolved |
| 2022-10-01 | Heptachlor | MR | No | Resolved |
| 2022-10-01 | Pentachlorophenol | MR | No | Resolved |
| 2022-10-01 | Toxaphene | MR | No | Resolved |
| 2022-10-01 | 2,4,5-TP | MR | No | Resolved |
| 2022-10-01 | Methoxychlor | MR | No | Resolved |
| 2022-10-01 | BHC-GAMMA | MR | No | Resolved |
| 2022-10-01 | Total Polychlorinated Biphenyls (PCB) | MR | No | Resolved |
| 2022-10-01 | 1,2-DIBROMO-3-CHLOROPROPANE | MR | No | Resolved |
| 2022-10-01 | Benzo(a)pyrene | MR | No | Resolved |
| 2022-10-01 | Dalapon | MR | No | Resolved |
| 2022-10-01 | Di(2-ethylhexyl) adipate | MR | No | Resolved |
| 2022-10-01 | Di(2-ethylhexyl) phthalate | MR | No | Resolved |
| 2022-10-01 | Dinoseb | MR | No | Resolved |
| 2022-10-01 | Diquat | MR | No | Resolved |
| 2022-10-01 | Endothall | MR | No | Resolved |
| 2022-10-01 | Glyphosate | MR | No | Resolved |
| 2022-10-01 | HEXACHLOROBENZENE | MR | No | Resolved |
| 2022-10-01 | Hexachlorocyclopentadiene | MR | No | Resolved |
| 2022-10-01 | OXAMYL | MR | No | Resolved |
| 2022-10-01 | Picloram | MR | No | Resolved |
| 2022-10-01 | Simazine | MR | No | Resolved |
| 2022-10-01 | 2,3,7,8-TCDD | MR | No | Resolved |
| 2022-10-01 | Arsenic | MR | No | Resolved |