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 |
|---|---|---|---|---|
|
Watertown Fire District Watertown · Litchfield County |
6,718 | 1 | 1 | |
|
Strawberry Park Preston · New London County |
1,047 | 3 | 3 | |
|
Tyrrell Middle School Wolcott · New Haven County |
454 | 2 | 2 | |
|
Fairview Country Club Greenwich · Fairfield County |
435 | 5 | 1 | |
|
Aquarion-New Fairfield New Fairfield · Fairfield County |
406 | 1 | 1 | |
|
Birch Groves Association, INC New Milford · Litchfield County |
300 | 3 | 2 | |
|
Pine Point School-Campbell Stonington · New London County |
267 | 4 | 2 | |
|
Devereux Glenholme School Main Campus Washington · Litchfield County |
245 | 2 | 1 | |
|
St. Dimitrie Romanian Orthodox Church Easton · Fairfield County |
200 | 1 | 1 | |
|
Lillinonah Park Estates Homeowners Assn Brookfield, New Milford · Litchfield County |
128 | 4 | 1 | |
|
Mountainside Lodge North Canaan · Litchfield County |
111 | 2 | 1 | |
|
Juniper Club Inc. Bloomfield · Hartford County |
104 | 5 | 3 | |
|
Breezy Knoll Association Litchfield, Morris · Litchfield County |
100 | 1 | 0 | |
|
Farmington Club Farmington · Hartford County |
100 | 2 | 1 | |
|
Hillandale Farm, Ct, LLC Bozrah · New London County |
88 | 2 | 2 | |
|
Northstone Gardens North Stonington · New London County |
79 | 3 | 2 | |
|
Ashland Pond Mobile Home Park Griswold · New London County |
74 | 3 | 1 | |
|
Middlefield Housing Authority Middlefield · Middlesex County |
62 | 3 | 2 | |
|
823 New Harwinton Road Torrington · Litchfield County |
60 | 3 | 1 | |
|
New Haven Sportsman's Club Inc. Guilford · New Haven County |
50 | 3 | 3 | |
|
I-395 Southbound Service Plaza Montville · New London County |
49 | 2 | 1 | |
|
123, 125, & 127 Norwich Road Plainfield · Windham County |
45 | 2 | 2 | |
|
Riverview Pizza Restaurant Plainfield · Windham County |
43 | 3 | 2 | |
|
Lake Waramaug/maintenance Tennis & Beach Washington · Litchfield County |
40 | 3 | 1 | |
|
The Cambridge House Granby · Hartford County |
40 | 1 | 1 | |
|
First Congregational Church of Woodstock Woodstock · Windham County |
38 | 2 | 2 | |
|
High Meadow Haddam · Middlesex County |
38 | 1 | 1 | |
|
Harvest Kitchen Pantry-Jones Family Farm Shelton · Fairfield County |
37 | 2 | 1 | |
|
Asia Darbar Plainville · Hartford County |
35 | 3 | 1 | |
|
Camp Simmons Well #2 Greenwich · Fairfield County |
31 | 2 | 1 | |
|
Golf Quest Southington Southington · Hartford County |
28 | 2 | 2 | |
|
20 Copper Hill Road East Granby · Hartford County |
25 | 4 | 1 | |
|
Always Moore, LLC Eastford · Windham County |
25 | 1 | 1 | |
|
Brass Horse Cafe & Motel Barkhamsted · Litchfield County |
25 | 2 | 2 | |
|
Camp Cochipianee Goshen · Litchfield County |
25 | 3 | 2 | |
|
Candlewood Isle Club House New Fairfield · Fairfield County |
25 | 3 | 1 | |
|
Church of the Epiphany Southbury · New Haven County |
25 | 4 | 0 | |
|
Connecticut Golf Club Easton · Fairfield County |
25 | 3 | 1 | |
|
Dodgingtown Market Newtown · Fairfield County |
25 | 2 | 0 | |
|
Duchess of Monroe Monroe · Fairfield County |
25 | 3 | 1 | |
|
Dunkin Donuts Preston · New London County |
25 | 1 | 1 | |
|
Easton Racquet Club Easton · Fairfield County |
25 | 2 | 1 | |
|
Flobee's LLC Ridgefield · Fairfield County |
25 | 3 | 1 | |
|
Franklin Wildlife Management Area Franklin · New London County |
25 | 2 | 1 | |
|
G. E. Harris Golf Course (concession) Greenwich · Fairfield County |
25 | 2 | 1 | |
|
Georges Terryville Market Bristol · Hartford County |
25 | 3 | 3 | |
|
Getaway House East Haddam · Middlesex County |
25 | 3 | 2 | |
|
Harrybrooke Park New Milford · Litchfield County |
25 | 3 | 1 | |
|
June Norcross Webster Well #2 Ashford · Windham County |
25 | 3 | 1 | |
|
Merwin Meadows Town Park Wilton · Fairfield County |
25 | 3 | 2 |
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.