Arsenic violations in Massachusetts
16 active public water systems in Massachusetts had a Arsenic violation in the past three years, 2 of them in the latest quarter of EPA's data. What Arsenic is and why it matters.
Systems with a Arsenic violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Lees Supermarket Westport · Bristol County |
90 | 2 | 0 | |
|
Stiles and Hart Brick Company Bridgewater · Plymouth County |
45 | 2 | 0 | |
|
Wannacomet Water Company Nantucket · Nantucket County |
27,703 | 7 | 2 | |
|
Winchester Water Dept Winchester · Middlesex County |
22,970 | 2 | 0 | |
|
Westborough Water Department Westborough · Worcester County |
21,567 | 4 | 0 | |
|
Scituate Water Division Scituate · Plymouth County |
19,297 | 6 | 2 | |
|
Hanover Water Dept Hanover · Plymouth County |
14,984 | 3 | 0 | |
|
West Bridgewater Water Dept West Bridgewater · Plymouth County |
7,709 | 1 | 0 | |
|
Halifax Water Department Halifax · Plymouth County |
7,575 | 4 | 0 | |
|
M.v. Public Charter School Tisbury · Dukes County |
150 | 2 | 0 | |
|
Staffordshire Country Estates Leicester · Worcester County |
140 | 2 | 0 | |
|
Carlson Orchards Harvard · Worcester County |
99 | 2 | 0 | |
|
Aquinnah Wampanoag County |
89 | 5 | 0 | |
|
Webco Chemical Corporation Dudley · Worcester County |
75 | 3 | 0 | |
|
First Congregational Church Plympton · Plymouth County |
55 | 5 | 1 | |
|
Anchor Academy Berkley Berkley · Bristol County |
41 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Arsenic, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Arsenic alone.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Massachusetts records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.