Lead and Copper Rule (LCR) violations in Connecticut
123 active public water systems in Connecticut had a Lead and Copper Rule (LCR) violation in the past three years, 122 of them in the latest quarter of EPA's data. What Lead and Copper Rule (LCR) is and why it matters.
Health effects: Lead: no safe level for children. Causes irreversible neurological damage, impaired cognitive development, behavioral problems, and reduced IQ in children under 6. In adults: hypertension, cardiovascular disease, kidney damage. Copper: acute gastrointestinal distress at high levels; liver/kidney damage at very high chronic levels.
Systems with a Lead and Copper Rule (LCR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Avon Water CO Avon, Farmington, Simsbury · Hartford County |
11,590 | 1 | 1 | |
|
Fairfield Hills Newtown · Fairfield County |
2,610 | 3 | 2 | |
|
Scwa, North Stonington Division (nst) North Stonington · New London County |
1,860 | 1 | 1 | |
|
New Fairfield Elementary School New Fairfield · Fairfield County |
1,425 | 3 | 2 | |
|
Aquarion-Ridgefield Knolls Ridgefield · Fairfield County |
958 | 1 | 1 | |
|
St. Bernard School Montville · New London County |
950 | 3 | 2 | |
|
Scwa, Oakdale Heights Division Montville · New London County |
876 | 2 | 1 | |
|
Indian Field Coop Campground Assn., Inc. Salem · New London County |
685 | 2 | 2 | |
|
Yeshiva of Waterbury-Durham Campus Durham · Middlesex County |
490 | 6 | 2 | |
|
East Hampton Middle School East Hampton · Middlesex County |
487 | 2 | 2 | |
|
Harmony Acres Mobile Home Park Prospect · New Haven County |
465 | 1 | 1 | |
|
Tyrrell Middle School Wolcott · New Haven County |
454 | 2 | 2 | |
|
Lyman Memorial High School Lebanon · New London County |
412 | 3 | 2 | |
|
ST Lukes School New Canaan · Fairfield County |
405 | 3 | 2 | |
|
Wells Road Intermediate School Granby · Hartford County |
405 | 1 | 1 | |
|
Whelen Engineering CO Chester · Middlesex County |
400 | 1 | 1 | |
|
Burr District Elementary School Haddam · Middlesex County |
364 | 1 | 1 | |
|
Birch Groves Association, INC New Milford · Litchfield County |
300 | 3 | 2 | |
|
Eastbury School Glastonbury · Hartford County |
280 | 2 | 2 | |
|
St. Thomas More School-Main System Montville · New London County |
270 | 2 | 0 | |
|
Marianapolis Prep School Admin/school Thompson · Windham County |
266 | 3 | 3 | |
|
The Grumman Hill Montessori Association Wilton · Fairfield County |
259 | 2 | 2 | |
|
Apple Rehab Rocky Hill · Hartford County |
238 | 6 | 2 | |
|
Eastford Elementary School Eastford · Windham County |
225 | 1 | 1 | |
|
Blue Trails Water Association Durham, North Branford · New Haven County |
224 | 4 | 2 | |
|
Hampton Elementary School Hampton · Windham County |
220 | 3 | 3 | |
|
Old Newgate Ridge Water Company INC East Granby · Hartford County |
208 | 3 | 3 | |
|
Linemaster Switch Corp Woodstock · Windham County |
178 | 3 | 1 | |
|
Waterview Business Park Montville · New London County |
176 | 2 | 2 | |
|
55 Sugar Street Newtown · Fairfield County |
158 | 5 | 2 | |
|
East Haddam Municipal Center East Haddam · Middlesex County |
154 | 2 | 1 | |
|
Ctwc Westchester East East Hampton · Middlesex County |
153 | 1 | 1 | |
|
Goodspeed Opera House East Haddam · Middlesex County |
150 | 3 | 2 | |
|
Bethany Mobile Home Park Bethany · New Haven County |
138 | 2 | 1 | |
|
74 Route 37, LLC New Fairfield · Fairfield County |
130 | 4 | 1 | |
|
Chelsea Common Condominium Association East Granby · Hartford County |
126 | 2 | 2 | |
|
Club House Apartments Mansfield · Tolland County |
115 | 2 | 2 | |
|
Integrated Illumination Systems Morris · Litchfield County |
115 | 2 | 2 | |
|
Emmanuel Episcopal Church Weston · Fairfield County |
113 | 6 | 1 | |
|
Sterling Engineering Corp. Barkhamsted · Litchfield County |
110 | 1 | 1 | |
|
720 Branchville LLC Ridgefield · Fairfield County |
100 | 3 | 3 | |
|
The Rogers Manufacturing Company Middlefield · Middlesex County |
100 | 1 | 1 | |
|
Twin Maples Nursing Home Durham · Middlesex County |
100 | 1 | 0 | |
|
Griswold MHP LLC Griswold · New London County |
99 | 3 | 2 | |
|
4 West Granby Road Granby · Hartford County |
97 | 3 | 1 | |
|
Grant Hill Associates, Inc. Bloomfield · Hartford County |
97 | 3 | 2 | |
|
Marlborough Congregational Church Marlborough · Hartford County |
97 | 1 | 1 | |
|
Bright Years Academy Southbury Southbury · New Haven County |
96 | 1 | 1 | |
|
George Washington Commons New Milford · Litchfield County |
85 | 2 | 1 | |
|
980 Rubber Avenue Naugatuck · New Haven County |
84 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Lead and Copper Rule (LCR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Lead and Copper Rule (LCR) 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.