Diquat violations in Massachusetts
12 active public water systems in Massachusetts had a Diquat violation in the past three years, 1 of them in the latest quarter of EPA's data. What Diquat is and why it matters.
Systems with a Diquat violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Townhouses @ Copper Lantern Carver · Plymouth County |
176 | 2 | 1 | |
|
Inima USA / Aquaria LLC Dighton · Bristol County |
105,643 | 1 | 0 | |
|
Centerville Osterville Marstons Mills WD Barnstable · Barnstable County |
50,000 | 2 | 0 | |
|
Wannacomet Water Company Nantucket · Nantucket County |
27,703 | 7 | 2 | |
|
Orleans Water Department Orleans · Barnstable County |
17,460 | 1 | 0 | |
|
Sharon Water Dept Sharon · Norfolk County |
16,846 | 1 | 0 | |
|
Halifax Water Department Halifax · Plymouth County |
7,575 | 4 | 0 | |
|
Siasconset Water Department Nantucket · Nantucket County |
3,000 | 3 | 1 | |
|
Andrews Farm Water Co.,inc. Boxford · Essex County |
150 | 10 | 6 | |
|
Chilmark School Chilmark · Dukes County |
90 | 2 | 1 | |
|
First Congregational Church Plympton · Plymouth County |
55 | 5 | 1 | |
|
Ashby Legion/grange/church Ashby · Middlesex County |
25 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Diquat, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Diquat 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.