Holliston Water Department
PWSID MA2136000 · Holliston, Massachusetts · serves 15,139 people · groundwater source
F
Failing
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFOS | 6.5 ppt | 4 ppt | 9/10/2025 |
| PFOA | 5.3 ppt | 4 ppt | 9/10/2025 |
| PFOS | 5.3 ppt | 4 ppt | 4/15/2025 |
| PFOA | 4.9 ppt | 4 ppt | 4/15/2025 |
| PFOA | 4.4 ppt | 4 ppt | 4/15/2025 |
| PFOA | 4.4 ppt | 4 ppt | 9/10/2025 |
| PFBS | 3.9 ppt | — | 9/10/2025 |
| PFBS | 3.7 ppt | — | 9/10/2025 |
| PFHxA | 3.5 ppt | — | 9/10/2025 |
| PFBS | 3.5 ppt | — | 4/15/2025 |
| PFHxA | 3.4 ppt | — | 4/15/2025 |
| PFPeA | 3.3 ppt | — | 9/10/2025 |
| PFBS | 3.1 ppt | — | 4/15/2025 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2024-10-01 | Lead and Copper Rule | MR | No | Addressed |
| 2023-04-01 | Lead and Copper Rule | MR | No | Addressed |
| 2023-04-01 | CARBON, TOTAL | MR | No | Resolved |
| 2023-01-01 | CARBON, TOTAL | MR | No | Resolved |
| 2022-10-01 | Dalapon | MR | No | Archived |
| 2022-10-01 | Di(2-ethylhexyl) adipate | MR | No | Archived |
| 2022-10-01 | Di(2-ethylhexyl) phthalate | MR | No | Archived |
| 2022-10-01 | Dinoseb | MR | No | Archived |
| 2022-10-01 | Diquat | MR | No | Archived |
| 2022-10-01 | Endothall | MR | No | Archived |
| 2022-10-01 | Glyphosate | MR | No | Archived |
| 2022-10-01 | HEXACHLOROBENZENE | MR | No | Archived |
| 2022-10-01 | Hexachlorocyclopentadiene | MR | No | Archived |
| 2022-10-01 | OXAMYL | MR | No | Archived |
| 2022-10-01 | Picloram | MR | No | Archived |
| 2022-10-01 | Simazine | MR | No | Archived |
| 2022-10-01 | 2,3,7,8-TCDD | MR | No | Archived |
| 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 | LASSO | MR | No | Archived |
| 2022-10-01 | Atrazine | MR | No | Archived |
| 2022-10-01 | Carbofuran | MR | No | Archived |
| 2022-10-01 | Chlordane | MR | No | Archived |
| 2022-10-01 | 2,4-D | MR | No | Archived |
| 2022-10-01 | Endrin | MR | No | Archived |
| 2022-10-01 | ETHYLENE DIBROMIDE | MR | No | Archived |
| 2022-10-01 | Heptachlor epoxide | MR | No | Archived |
| 2022-10-01 | Heptachlor | MR | No | Archived |
| 2022-10-01 | Pentachlorophenol | MR | No | Archived |
| 2022-10-01 | Toxaphene | MR | No | Archived |
| 2022-10-01 | 2,4,5-TP | MR | No | Archived |
| 2022-10-01 | Methoxychlor | MR | No | Archived |
| 2022-10-01 | BHC-GAMMA | MR | No | Archived |
| 2022-10-01 | Total Polychlorinated Biphenyls (PCB) | MR | No | Archived |
| 2022-10-01 | 1,2-DIBROMO-3-CHLOROPROPANE | MR | No | Archived |
| 2022-10-01 | Benzo(a)pyrene | MR | No | Archived |