What's really in Hull's tap water?
Hull sits at the far end of the Weir River Water System, drawing the same treated supply as Hingham and North Cohasset — sourced from Accord Pond and eleven groundwater wells across the Weir Watershed, all located in Hingham. EPA's Fifth Unregulated Contaminant Monitoring Rule (UCMR5), run between 2023 and 2025, found five PFAS "forever chemical" compounds in the system's testing results, which apply equally to Hull households.
None of this represents an EPA violation — the utility remains within its legal limits. But one of the compounds detected, PFOA, was measured above the EPA's own individual health-based limit for that chemical.
| Compound | Detected level | EPA limit (individual) |
|---|---|---|
| PFOA | 5.7 ppt | 4 ppt |
| PFBA | 5.7 ppt | — |
| PFBS | 3.3 ppt | — |
| PFPeA | 3.1 ppt | — |
| PFHxA | 3.1 ppt | — |
Source: EPA UCMR5 occurrence data, 2023–2025, for the Weir River Water System. See the full breakdown and methodology on the Water data page.
