All water systems in Connecticut
2,334 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Lisbon Central School Lisbon · New London County |
620 | 0 | 0 | |
|
Nathan Hale-Ray Middle School East Haddam · Middlesex County |
620 | 1 | 1 | |
|
Woodstock Academy South Campus Woodstock · Windham County |
620 | 1 | 1 | |
|
Cherry Brook School Canton · Hartford County |
615 | 2 | 2 | |
|
East Haddam Elementary School East Haddam · Middlesex County |
600 | 1 | 1 | |
|
Ski Sundown, Inc. New Hartford · Litchfield County |
600 | 0 | 0 | |
|
Watertown Water & Sewer Westgate Watertown · Litchfield County |
600 | 2 | 0 | |
|
Aquarion-Suffield Suffield · Hartford County |
595 | 1 | 1 | |
|
Kent Falls State Park Kent · Litchfield County |
573 | 1 | 1 | |
|
East Hampton High School East Hampton · Middlesex County |
568 | 2 | 1 | |
|
Brunswick School (lower & Lower Middle) Greenwich · Fairfield County |
567 | 0 | 0 | |
|
Valley Regional High School Deep River · Middlesex County |
565 | 2 | 1 | |
|
Quonnipaug Hills Main System Guilford · New Haven County |
564 | 2 | 1 | |
|
Bethany Community School Bethany · New Haven County |
550 | 0 | 0 | |
|
Preston Plains Water Company Preston · New London County |
550 | 2 | 0 | |
|
Calvary Fellowship Southbury Southbury · New Haven County |
540 | 1 | 0 | |
|
Edgemere Condominium Assn., Inc. East Hampton · Middlesex County |
540 | 3 | 0 | |
|
Elisabeth M. Bennet Academy Manchester · Hartford County |
536 | 2 | 1 | |
|
Wadsworth Falls/bathroom Well Middlefield · Middlesex County |
527 | 0 | 0 | |
|
Lebanon Elementary School Lebanon · New London County |
525 | 2 | 1 | |
|
Candlewood Knolls Water Authority New Fairfield · Fairfield County |
524 | 1 | 0 | |
|
Scwa, Chesterfield Division Montville · New London County |
524 | 0 | 0 | |
|
C E Murphy School Montville · New London County |
520 | 1 | 1 | |
|
Salisbury School Salisbury · Litchfield County |
520 | 0 | 0 | |
|
Woodstock Middle School Woodstock · Windham County |
511 | 1 | 1 | |
|
Head O'meadow Elementary School Newtown · Fairfield County |
506 | 1 | 0 | |
|
Stone Bridge Center for Health & Rehab Newtown · Fairfield County |
504 | 2 | 1 | |
|
Ctwc South Coventry System Coventry · Tolland County |
501 | 0 | 0 | |
|
Camp Jewell-Senior Colebrook · Litchfield County |
500 | 0 | 0 | |
|
Camp Jewell-Sunrise Colebrook · Litchfield County |
500 | 1 | 0 | |
|
Pomfret Community School Pomfret · Windham County |
500 | 0 | 0 | |
|
Preston Veterans Memorial School Preston · New London County |
500 | 1 | 1 | |
|
ST Lukes School Athletic Center New Canaan · Fairfield County |
500 | 5 | 0 | |
|
Sunny Valley Tax District New Milford · Litchfield County |
500 | 5 | 1 | |
|
Kitemaug Orchard Association, Inc. Montville · New London County |
490 | 0 | 0 | |
|
Yeshiva of Waterbury-Durham Campus Durham · Middlesex County |
490 | 6 | 2 | |
|
Woodhaven Apartments Willington · Tolland County |
489 | 2 | 1 | |
|
Aquarion-Falls Village Canaan · Litchfield County |
488 | 2 | 1 | |
|
Branchville School Ridgefield · Fairfield County |
488 | 0 | 0 | |
|
East Hampton Middle School East Hampton · Middlesex County |
487 | 2 | 2 | |
|
Parish Hill High School Chaplin · Windham County |
487 | 1 | 1 | |
|
North Windham Elementary School Windham · Windham County |
485 | 3 | 0 | |
|
Melissa Jones School Guilford · New Haven County |
484 | 1 | 0 | |
|
Amity Regional Junior High School Bethany · New Haven County |
475 | 0 | 0 | |
|
Ashford School Ashford · Windham County |
475 | 0 | 0 | |
|
Harmony Acres Mobile Home Park Prospect · New Haven County |
465 | 1 | 1 | |
|
Village Market Place Goshen · Litchfield County |
462 | 2 | 2 | |
|
Nathan Hale-Ray High School East Haddam · Middlesex County |
461 | 1 | 1 | |
|
Aquarion-Lakeside Southbury · New Haven County |
455 | 0 | 0 | |
|
Tyrrell Middle School Wolcott · New Haven County |
454 | 2 | 2 |
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.