E. coli (Escherichia coli) violations in Connecticut
119 active public water systems in Connecticut had a E. coli (Escherichia coli) violation in the past three years, 64 of them in the latest quarter of EPA's data. What E. coli (Escherichia coli) is and why it matters.
Systems with a E. coli (Escherichia coli) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Circle Pizza Madison · New Haven County |
25 | 2 | 0 | |
|
Crystal Lake Community Methodist Church Ellington · Tolland County |
25 | 3 | 1 | |
|
Easton Village Store Easton · Fairfield County |
25 | 2 | 0 | |
|
First Congregational Church of E Windsor East Windsor · Hartford County |
25 | 3 | 0 | |
|
G. E. Harris Golf Course (maintenance) Greenwich · Fairfield County |
25 | 2 | 0 | |
|
Global Partners LP Norwich · New London County |
25 | 2 | 0 | |
|
Henny Penny (hendels Inc.) Salem Salem · New London County |
25 | 1 | 0 | |
|
Lake Zoar Drive in Monroe · Fairfield County |
25 | 3 | 0 | |
|
Laurel Hill Complex Brookfield · Fairfield County |
25 | 3 | 2 | |
|
Michael's Tap Room Bethel · Fairfield County |
25 | 3 | 1 | |
|
Monroe Amoco (g & M Auto) Monroe · Fairfield County |
25 | 4 | 0 | |
|
Monroe Food Mart Monroe · Fairfield County |
25 | 2 | 1 | |
|
National Audubon Society Sharon · Litchfield County |
25 | 2 | 0 | |
|
National Audubon Society (main Building) Greenwich · Fairfield County |
25 | 3 | 0 | |
|
Plainfield Rest Area (i-395 N&s) Plainfield · Windham County |
25 | 2 | 0 | |
|
Seymour Land Trust-Bldg & Athletic Field Seymour · New Haven County |
25 | 2 | 0 | |
|
SJ Ranch, Inc. (well #3 Ranch House) Ellington · Tolland County |
25 | 2 | 1 | |
|
Voluntown Town Hall Voluntown · New London County |
25 | 1 | 0 | |
|
Willington Mobil Willington · Tolland County |
25 | 3 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved E. coli (Escherichia coli), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not E. coli (Escherichia coli) 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 Connecticut 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.