Nitrite violations in Connecticut
90 active public water systems in Connecticut had a Nitrite violation in the past three years, 2 of them in the latest quarter of EPA's data. What Nitrite is and why it matters.
Health effects: Methemoglobinemia ('blue baby syndrome') in infants under 6 months: reduced oxygen delivery to tissues can be life-threatening. Pregnant women and people with glucose-6-phosphate dehydrogenase (G6PD) deficiency are also at elevated risk. Adults are generally less susceptible due to more effective methemoglobin reduction.
Systems with a Nitrite violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Krauszers Derby · New Haven County |
48 | 2 | 0 | |
|
Village of Boulder Ridge Well #1 Barkhamsted · Litchfield County |
25 | 1 | 0 | |
|
Bethel Water Dept Bethel, Danbury · Fairfield County |
9,507 | 6 | 0 | |
|
Southbury Training School Southbury · New Haven County |
816 | 4 | 1 | |
|
Kent School Corp (valley Campus) Kent · Litchfield County |
722 | 2 | 0 | |
|
ST Lukes School Athletic Center New Canaan · Fairfield County |
500 | 5 | 0 | |
|
Colchester Estates Colchester · New London County |
276 | 6 | 2 | |
|
Cannabis Retailer at 195 Albany Turnpike Canton · Hartford County |
214 | 3 | 1 | |
|
Ashford Hills Apartments Ashford · Windham County |
136 | 8 | 2 | |
|
Ccarc Inc. Berlin · Hartford County |
125 | 1 | 0 | |
|
Kent School Hockey Rink Kent · Litchfield County |
108 | 2 | 0 | |
|
Atlas Commons Old Saybrook · Middlesex County |
100 | 8 | 1 | |
|
Fall Brook Mobile Home Park Killingly · Windham County |
98 | 6 | 1 | |
|
Woods Edge Apartments Mansfield · Tolland County |
96 | 5 | 2 | |
|
Stonington Institute Knollwood North Stonington · New London County |
77 | 1 | 0 | |
|
Stonington Institute Lodge North Stonington · New London County |
77 | 2 | 0 | |
|
Stonington Institute Main Building North Stonington · New London County |
77 | 1 | 0 | |
|
Stonington Institute North Building North Stonington · New London County |
77 | 3 | 0 | |
|
Round Hill LLC Well# 1&2 Lisbon · New London County |
72 | 9 | 3 | |
|
Mystic Village Apartments Groton · New London County |
66 | 2 | 1 | |
|
White Barn Children's Center Thompson · Windham County |
65 | 2 | 1 | |
|
Sharon Ridge Apartments Sharon · Litchfield County |
62 | 2 | 0 | |
|
326 Route 87 Columbia Columbia · Tolland County |
50 | 2 | 0 | |
|
Kent School Day Care Kent · Litchfield County |
50 | 1 | 0 | |
|
Trinity Glen-McCa Sharon · Litchfield County |
50 | 2 | 0 | |
|
Cornwall Water Company Cornwall · Litchfield County |
48 | 8 | 3 | |
|
Sunset Apartments LLC Bolton · Tolland County |
46 | 6 | 2 | |
|
381 Town Street East Haddam East Haddam · Middlesex County |
42 | 4 | 1 | |
|
Salem Town Hall Salem · New London County |
41 | 1 | 0 | |
|
Acls Properties Inc. Danbury · Fairfield County |
40 | 3 | 0 | |
|
Kent School (maintenance Well) Kent · Litchfield County |
40 | 2 | 0 | |
|
Middlesex Hospital Phys Rehab&occup. Med Essex · Middlesex County |
40 | 2 | 0 | |
|
Vitale Aquatic & Tennis Ledyard · New London County |
40 | 2 | 0 | |
|
Stonington Institute Infirmary North Stonington · New London County |
39 | 1 | 0 | |
|
DW Transport & Leasing, Inc. Franklin · New London County |
38 | 2 | 0 | |
|
44 Stony Hill Road Bethel · Fairfield County |
37 | 2 | 0 | |
|
10-16 Putnam Road Plainfield · Windham County |
36 | 3 | 1 | |
|
292 Candlewood Lake RD Brookfield · Fairfield County |
35 | 2 | 0 | |
|
Giv Coffee Roastery and Cafe Canton · Hartford County |
34 | 1 | 0 | |
|
Killingly Professional Building Killingly · Windham County |
33 | 2 | 0 | |
|
Oakridge Village Montville · New London County |
33 | 5 | 1 | |
|
255 Route 80 Killingworth Killingworth · Middlesex County |
32 | 4 | 1 | |
|
Perry Plaza Southington · Hartford County |
32 | 2 | 1 | |
|
Middlesex Hospital Medical Facility East Haddam · Middlesex County |
31 | 4 | 1 | |
|
40 William F. Palmer RD East Haddam · Middlesex County |
30 | 3 | 0 | |
|
Alcove Motel New Hartford · Litchfield County |
30 | 4 | 1 | |
|
Country Farms Plainfield · Windham County |
30 | 2 | 0 | |
|
Julien's Farm Store Granby · Hartford County |
30 | 1 | 0 | |
|
Red Fox Marketplace and Panini Grill Middlefield · Middlesex County |
30 | 3 | 1 | |
|
Donut Twist LLC Marlborough · Hartford County |
29 | 2 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved Nitrite, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Nitrite 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. Retrieved from ECHO on Oct 11, 2026.