All water systems in Connecticut
2,334 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Ctwc Thompson System Thompson · Windham County |
1,070 | 0 | 0 | |
|
Ctwc Shoreline Region-Point O Woods Old Lyme · New London County |
1,068 | 0 | 0 | |
|
Sprague Water & Sewer Authority Sprague · New London County |
1,058 | 2 | 0 | |
|
Strawberry Park Preston · New London County |
1,047 | 3 | 3 | |
|
Brookfield High School Brookfield · Fairfield County |
995 | 0 | 0 | |
|
Aquarion-Ridgefield Knolls Ridgefield · Fairfield County |
958 | 1 | 1 | |
|
St. Bernard School Montville · New London County |
950 | 3 | 2 | |
|
Whisconier Middle School Brookfield · Fairfield County |
950 | 0 | 0 | |
|
Aquarion-Norfolk Norfolk · Litchfield County |
913 | 0 | 0 | |
|
Woodlake Tax District Woodbury · Litchfield County |
912 | 0 | 0 | |
|
Ctwc Amston Lake Division Colchester, Hebron, Lebanon · Tolland County |
910 | 1 | 1 | |
|
Frito-Lay Killingly · Windham County |
903 | 1 | 0 | |
|
Nonnewaug High School Woodbury · New Haven County |
887 | 0 | 0 | |
|
Scwa, Oakdale Heights Division Montville · New London County |
876 | 2 | 1 | |
|
Joel Barlow Regional High School Redding · Fairfield County |
860 | 0 | 0 | |
|
Kenmont & Kenwood Camps Kent · Litchfield County |
825 | 0 | 0 | |
|
Aquarion-Kent Kent · Litchfield County |
817 | 0 | 0 | |
|
Southbury Training School Southbury · New Haven County |
816 | 4 | 1 | |
|
Redding Elementary School Redding · Fairfield County |
811 | 0 | 0 | |
|
Haddam Killingworth Inter/middle School Killingworth · Middlesex County |
808 | 0 | 0 | |
|
Sharon Water & Sewer Commission Sharon · Litchfield County |
803 | 4 | 1 | |
|
Greenwich American Center Greenwich · Fairfield County |
800 | 2 | 0 | |
|
Hopeville Pond S.p./beach-Well #2 Griswold · New London County |
800 | 1 | 0 | |
|
Horace Porter School Columbia · Tolland County |
797 | 1 | 0 | |
|
Talcott Mountain S.p. Simsbury · Hartford County |
793 | 1 | 1 | |
|
Haddam Meadows S.p. Haddam · Middlesex County |
780 | 0 | 0 | |
|
Shepaug Middle/high School Washington · Litchfield County |
770 | 2 | 1 | |
|
Bolton Center School (k-8) Bolton · Tolland County |
756 | 1 | 1 | |
|
Ctwc Jensens Beechwood System Killingworth · Middlesex County |
750 | 1 | 0 | |
|
Ctwc Uconn South Eagleville Div. Mansfield · Tolland County |
750 | 0 | 0 | |
|
Housatonic Valley Regional HS Canaan · Litchfield County |
750 | 1 | 0 | |
|
Ctwc Northern Reg Lakewood/lakeview Coventry · Tolland County |
748 | 0 | 0 | |
|
Clc Owners Corporation Brookfield, New Milford · Litchfield County |
736 | 2 | 0 | |
|
Kent School Corp (valley Campus) Kent · Litchfield County |
722 | 2 | 0 | |
|
Lake Garda School Burlington · Hartford County |
715 | 0 | 0 | |
|
Mansfield Middle School Mansfield · Tolland County |
715 | 0 | 0 | |
|
Ctwc Spice Hill Division East Hampton · Middlesex County |
712 | 0 | 0 | |
|
Lake Waubeeka Association Danbury · Fairfield County |
712 | 0 | 0 | |
|
Ctwc Coventry Hills Div Coventry · Tolland County |
700 | 0 | 0 | |
|
Penwood State Park/main Park Well Bloomfield · Hartford County |
700 | 0 | 0 | |
|
Mansfield Elementary School Mansfield · Tolland County |
688 | 0 | 0 | |
|
Indian Field Coop Campground Assn., Inc. Salem · New London County |
685 | 2 | 2 | |
|
Salem Elementary School Salem · New London County |
675 | 0 | 0 | |
|
YMCA Camp Ingersoll Portland · Middlesex County |
653 | 2 | 1 | |
|
Scwa, Ledyard Center Division Ledyard · New London County |
652 | 0 | 0 | |
|
Ctwc Lake Hayward East Haddam · Middlesex County |
650 | 1 | 1 | |
|
Haddam-Killingworth High School Haddam · Middlesex County |
642 | 0 | 0 | |
|
Alcott School Wolcott · New Haven County |
638 | 0 | 0 | |
|
Woodstock Elementary School Woodstock · Windham County |
636 | 1 | 1 | |
|
Aquarion-Ball Pond New Fairfield · Fairfield County |
629 | 0 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
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.