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.
Health effects: Most E. coli strains cause diarrheal illness. Some strains (e.g., O157:H7) produce toxins causing severe bloody diarrhea, hemolytic uremic syndrome (HUS — a form of kidney failure), and death — especially in children under 5 and the elderly. Even non-pathogenic strains in drinking water indicate that disease-causing organisms may also be present.
Systems with a E. coli (Escherichia coli) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Monroe Little League Beardsley Fields Monroe · Fairfield County |
25 | 3 | 2 | |
|
Panthorn Park Upper Restroom Southington · Hartford County |
25 | 2 | 1 | |
|
Rebellion Kitchen and Bar Danbury · Fairfield County |
25 | 3 | 2 | |
|
Red Carpet Motel New Milford · Litchfield County |
25 | 2 | 2 | |
|
Saints Drive-In Restaurant Southington · Hartford County |
25 | 4 | 1 | |
|
Salem Farms Campground, INC Salem · New London County |
25 | 3 | 2 | |
|
St. Barnabas Church Greenwich · Fairfield County |
25 | 2 | 2 | |
|
State Police Fleet Maintenance Colchester · New London County |
25 | 3 | 2 | |
|
Sun Valley Beach Club Stafford · Tolland County |
25 | 3 | 1 | |
|
The Waterview Monroe · Fairfield County |
25 | 2 | 2 | |
|
Topstone Town Park Redding · Fairfield County |
25 | 1 | 0 | |
|
Wolcott Public Library Wolcott · New Haven County |
25 | 2 | 2 | |
|
Woodcock Nature Center INC Wilton · Fairfield County |
25 | 3 | 0 | |
|
Zone Nation Sports Seymour · New Haven County |
25 | 2 | 1 | |
|
Colchester Sewer & Water Commission Colchester · New London County |
4,020 | 4 | 0 | |
|
Aquarion-New Hartford New Hartford · Litchfield County |
1,872 | 1 | 0 | |
|
Woodstock Academy Woodstock · Windham County |
1,125 | 3 | 2 | |
|
Quonnipaug Hills Main System Guilford · New Haven County |
564 | 2 | 1 | |
|
Sunny Valley Tax District New Milford · Litchfield County |
500 | 5 | 1 | |
|
ST Lukes School New Canaan · Fairfield County |
405 | 3 | 2 | |
|
East Hampton Wpca Village Center East Hampton · Middlesex County |
366 | 5 | 0 | |
|
East Hampton Wpca Royal Oaks System East Hampton · Middlesex County |
328 | 4 | 0 | |
|
Crystal Lake School Ellington · Tolland County |
275 | 2 | 1 | |
|
YMCA Camp Mountain Laurel Hamden · New Haven County |
180 | 1 | 0 | |
|
55 Sugar Street Newtown · Fairfield County |
158 | 5 | 2 | |
|
Cobalt Lodge Healthcare & Rehab Center East Hampton · Middlesex County |
130 | 5 | 0 | |
|
TA Travel Plaza Willington · Tolland County |
130 | 1 | 0 | |
|
7 Berkshire Road Newtown Newtown · Fairfield County |
103 | 1 | 0 | |
|
Rocky Glen Mill Newtown · Fairfield County |
70 | 6 | 1 | |
|
Enchanted Garden Ethan Allen Hwy Ridgefield · Fairfield County |
61 | 6 | 1 | |
|
Elmwood Court, LLC Bethel · Fairfield County |
54 | 6 | 2 | |
|
The Quarry Campground LLC (campers) Tolland · Tolland County |
50 | 3 | 0 | |
|
Roxbury Market Properties, LLC Roxbury · Litchfield County |
49 | 3 | 1 | |
|
GR Art and Care Building Stamford · Fairfield County |
40 | 4 | 0 | |
|
Koinonia School of Sports Thompson · Windham County |
40 | 2 | 0 | |
|
Great Hollow Lake Monroe · Fairfield County |
35 | 3 | 0 | |
|
Kent Falls Brewing Company Kent · Litchfield County |
35 | 1 | 0 | |
|
Beacon Hill Evangelical Free Church Monroe · Fairfield County |
33 | 2 | 0 | |
|
McMullin Manufacturing Corporation Brookfield · Fairfield County |
33 | 5 | 2 | |
|
Gyre9 Southbury · New Haven County |
32 | 5 | 1 | |
|
Gas Plus Haddam · Middlesex County |
30 | 2 | 0 | |
|
Orchard Hill Association Bloomfield · Hartford County |
30 | 4 | 0 | |
|
D'eliana East Hampton · Middlesex County |
29 | 1 | 0 | |
|
Middlebury Recreation Park Middlebury · New Haven County |
27 | 2 | 0 | |
|
12 Rae Palmer Road East Haddam East Haddam · Middlesex County |
25 | 2 | 0 | |
|
13 North Main Street East Hampton · Middlesex County |
25 | 2 | 0 | |
|
144 Sugar Street Newtown · Fairfield County |
25 | 2 | 0 | |
|
2103 Storrs Road Mansfield · Tolland County |
25 | 2 | 0 | |
|
7-Eleven Store Danbury · Fairfield County |
25 | 2 | 0 | |
|
Brooksvale Park-Veterans' Memorial Bldg Hamden · New Haven County |
25 | 3 | 0 |
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.