Groundwater Rule (GWR) violations in Connecticut
32 active public water systems in Connecticut had a Groundwater Rule (GWR) violation in the past three years, 28 of them in the latest quarter of EPA's data. What Groundwater Rule (GWR) is and why it matters.
Systems with a Groundwater Rule (GWR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Ctwc Unionville System Avon, Bristol, Farmington and 1 more · Hartford County |
14,693 | 1 | 0 | |
|
Vernon Village Inc. South Windsor, Vernon · Tolland County |
430 | 2 | 0 | |
|
North Willington Village Condo Assoc. Willington · Tolland County |
66 | 4 | 2 | |
|
Cornwall Water Company Cornwall · Litchfield County |
48 | 8 | 3 | |
|
Chatham Apartments East Hampton · Middlesex County |
40 | 1 | 0 | |
|
Guidas Drive-In Restaurant Middlefield · Middlesex County |
40 | 1 | 1 | |
|
High Point Gardens Wolcott · New Haven County |
40 | 3 | 2 | |
|
Town of Hebron East Street Park Hebron · Tolland County |
37 | 2 | 0 | |
|
31 Grist Mill RD East Haddam · Middlesex County |
30 | 5 | 4 | |
|
Donut Twist LLC Marlborough · Hartford County |
29 | 2 | 1 | |
|
2 School ST Barkhamsted · Litchfield County |
28 | 1 | 1 | |
|
659 Danbury Road Ridgefield Ridgefield · Fairfield County |
25 | 2 | 0 | |
|
Casa LU Ridgefield · Fairfield County |
25 | 3 | 2 | |
|
Eastbury Pond Glastonbury · Hartford County |
25 | 2 | 1 | |
|
Franklin Mobil Franklin · New London County |
25 | 1 | 1 | |
|
Fresca Bar and Grill Colchester · New London County |
25 | 2 | 2 | |
|
Georginas Pizza Bolton · Tolland County |
25 | 1 | 1 | |
|
J&s Enterprise LLC Marlborough · Hartford County |
25 | 2 | 1 | |
|
Laurel Hill Complex Brookfield · Fairfield County |
25 | 3 | 2 | |
|
Laurel Lock Campground-Cottage/lake Well Montville · New London County |
25 | 1 | 0 | |
|
Little Brook Plaza Bozrah · New London County |
25 | 1 | 1 | |
|
Northford Community Church North Branford · New Haven County |
25 | 1 | 1 | |
|
Northford Plaza Realty Group North Branford · New Haven County |
25 | 1 | 1 | |
|
Nouria Energy Wolcott · New Haven County |
25 | 3 | 2 | |
|
Seymour Land Trust-Bldg & Athletic Field Seymour · New Haven County |
25 | 2 | 0 | |
|
St. Lawrence Church (rec Hall) Well 1 Killingworth · Middlesex County |
25 | 2 | 2 | |
|
Victory Tabernacle Church Middlefield · Middlesex County |
25 | 1 | 1 | |
|
White Horse Restaurant Washington · Litchfield County |
25 | 2 | 0 | |
|
Aquarion-Plainville Regional Bristol, Farmington, Plainville and 1 more · Hartford County |
18,231 | 1 | 0 | |
|
New Fairfield High/middle School New Fairfield · Fairfield County |
1,400 | 5 | 0 | |
|
Candle Hill Mobile Home Park New Milford · Litchfield County |
233 | 4 | 0 | |
|
Georges Terryville Market Bristol · Hartford County |
25 | 3 | 3 |
About this data
A system is counted once if any of its violations in the past three years involved Groundwater Rule (GWR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Groundwater Rule (GWR) 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.