COUNTY WATER-SYSTEM LEDGER
Nantucket, Massachusetts
EPA’s September 2026 export lists 2 active community water systems serving Nantucket, Massachusetts, with 2 current-violation flags and 0 serious-violator flags among the covered systems.
Source: EPA SDWIS system-search export · Active community systems serving 2,500+ people · Snapshot 13 Sep 2026
01 / SYSTEMS
Water systems serving Nantucket, Massachusetts
EPA associates 2 covered systems with Nantucket, Massachusetts; their reported population-served values total 30,703 and may overlap.
Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| Wannacomet Water CompanyMA4197000 | 27,703 | Ground water | Current monitoring/reporting flag |
| Siasconset Water DepartmentMA4197001 | 3,000 | Ground water | Other current violation flag |
02 / SOURCE MIX
Primary water sources for Nantucket, Massachusetts
EPA classifies 2 systems serving Nantucket, Massachusetts across 1 primary-source categories; Ground water is the largest category with 2 systems.
It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.