Diquat violations in Maine
58 active public water systems in Maine had a Diquat violation in the past three years. What Diquat is and why it matters.
Health effects: Chronic exposure to diquat is associated with cataracts and kidney damage in animal studies. Acute high-level exposure causes gastrointestinal distress. EPA has not classified diquat as a human carcinogen. Individuals with kidney conditions may be at elevated risk from chronic exposure.
Systems with a Diquat violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Kennebunk, Kennebunkport & Wells WD Kennebunk, Kennebunkport, Wells · York County |
35,663 | 2 | 0 | |
|
Lisbon Water Department Lisbon · Androscoggin County |
6,643 | 3 | 0 | |
|
Houlton Water Company Houlton · Aroostook County |
4,735 | 2 | 0 | |
|
Farmington Village Corp Water Dept Farmington · Franklin County |
4,050 | 3 | 0 | |
|
Caribou Utilities District Caribou · Aroostook County |
3,943 | 2 | 0 | |
|
Wilton Water Department Wilton · Franklin County |
2,800 | 3 | 0 | |
|
Searsport Water District Searsport · Waldo County |
2,763 | 1 | 0 | |
|
Fort Kent W & W Department Fort Kent · Aroostook County |
1,578 | 4 | 1 | |
|
Rangeley Water District Dallas Plt, Rangeley, Rangeley Plt and 1 more · Franklin County |
1,378 | 1 | 0 | |
|
Harrison Water District Harrison · Cumberland County |
863 | 4 | 2 | |
|
Msad 52 Leavitt Area High School Turner · Androscoggin County |
712 | 2 | 1 | |
|
Msad 61 Lake Region High School Naples · Cumberland County |
700 | 1 | 0 | |
|
Winter Harbor Water District Winter Harbor · Hancock County |
700 | 3 | 1 | |
|
Washburn Water & Sewer District Washburn · Aroostook County |
688 | 3 | 1 | |
|
Limerick Water District Limerick · York County |
625 | 2 | 0 | |
|
Msad 61 Songo Locks Elementary School Naples · Cumberland County |
478 | 2 | 0 | |
|
Franklin Water Department Franklin · Hancock County |
420 | 4 | 1 | |
|
Msad 52 Greene Central School Greene · Androscoggin County |
408 | 1 | 0 | |
|
Ecj/bluetriton Brands Hollis · York County |
406 | 1 | 0 | |
|
Msad 61 Lake Region Middle School Naples · Cumberland County |
400 | 3 | 0 | |
|
Msad 52 Turner Primary School Turner · Androscoggin County |
357 | 3 | 0 | |
|
Msad 52 Turner Elementary School Turner · Androscoggin County |
356 | 1 | 0 | |
|
Msad 52 Tripp Middle School Turner · Androscoggin County |
343 | 1 | 0 | |
|
Msad 61 Crooked River School Casco · Cumberland County |
300 | 3 | 0 | |
|
Monson Utilities District Monson · Piscataquis County |
298 | 5 | 1 | |
|
Msad 70 Hodgdon Elementary School Hodgdon · Aroostook County |
264 | 3 | 1 | |
|
Msad 52 Leeds Central School Leeds · Androscoggin County |
249 | 1 | 0 | |
|
Aos 96 Elm Street School East Machias · Washington County |
230 | 2 | 1 | |
|
Pine Spring Roads & Water Shapleigh · York County |
220 | 5 | 1 | |
|
Msad 70 Hodgdon High School Hodgdon · Aroostook County |
187 | 3 | 1 | |
|
Plymouth Water District Plymouth · Penobscot County |
150 | 4 | 2 | |
|
ST Josephs Memory Care Frenchville · Aroostook County |
143 | 5 | 2 | |
|
Cathance Trailer Park Topsham · Sagadahoc County |
135 | 4 | 0 | |
|
Homestead Estates LLC Glenburn · Penobscot County |
125 | 5 | 3 | |
|
Rsu 01 Phippsburg Elementary School Phippsburg · Sagadahoc County |
120 | 2 | 0 | |
|
South Slope Estates MHP Carmel · Penobscot County |
100 | 5 | 1 | |
|
Stepping Stones/montessori School Chelsea · Kennebec County |
99 | 2 | 1 | |
|
Oakwood Mobile Community Association Lyman · York County |
95 | 3 | 1 | |
|
Oakwood Mobile Community Association-2 Lyman · York County |
95 | 2 | 0 | |
|
Msad 44 Woodstock Elem School Woodstock · Oxford County |
91 | 4 | 1 | |
|
Birchwood Trailer Park Belmont · Waldo County |
90 | 3 | 0 | |
|
Hingham Heights Glenburn · Penobscot County |
90 | 6 | 1 | |
|
Oquossoc Standard Water System Rangeley · Franklin County |
88 | 1 | 0 | |
|
Kids & CO Childcare Center Turner · Androscoggin County |
71 | 3 | 0 | |
|
Streets Mobile Home Park Alton · Penobscot County |
65 | 3 | 2 | |
|
Boulier Place Apts Hermon · Penobscot County |
60 | 3 | 0 | |
|
Howell Laboratories Bridgton · Cumberland County |
60 | 4 | 0 | |
|
Maine Woods Company LLC Portage Lake · Aroostook County |
60 | 2 | 0 | |
|
Greenledge Park LLC Pittston · Kennebec County |
55 | 3 | 1 | |
|
Loring Woods Park Limestone · Aroostook County |
55 | 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 Maine 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.