All water systems in Connecticut
2,334 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Bucks Rock Camp New Milford · Litchfield County |
450 | 1 | 0 | |
|
Hebron Elementary School Hebron · Tolland County |
450 | 1 | 0 | |
|
Scwa, Hillcrest Division (hlc) Montville · New London County |
450 | 0 | 0 | |
|
Aquarion-Oxford Towne Center Oxford · New Haven County |
449 | 0 | 0 | |
|
Frisbie Elementary School Wolcott · New Haven County |
446 | 0 | 0 | |
|
Ctwc Shoreline Region-Masons Island Stonington · New London County |
445 | 0 | 0 | |
|
Ctwc Bay Mountain Griswold · New London County |
440 | 0 | 0 | |
|
Fairview Country Club Greenwich · Fairfield County |
435 | 5 | 1 | |
|
Quassy Amusement Park Middlebury · New Haven County |
431 | 1 | 0 | |
|
John Read Middle School Redding · Fairfield County |
430 | 0 | 0 | |
|
Sherman Elementary School Sherman · Fairfield County |
430 | 5 | 1 | |
|
Vernon Village Inc. South Windsor, Vernon · Tolland County |
430 | 2 | 0 | |
|
Stafford Hollow Water Association Stafford · Tolland County |
429 | 1 | 1 | |
|
Farmingville Elementary School Ridgefield · Fairfield County |
428 | 0 | 0 | |
|
Ctwc Redwood Farms Division Manchester · Hartford County |
424 | 0 | 0 | |
|
George Hersey Robertson School Coventry · Tolland County |
420 | 1 | 1 | |
|
Aspetuck Valley Country Club-Clubhouse Weston · Fairfield County |
415 | 0 | 0 | |
|
Coventry Grammar School Coventry · Tolland County |
415 | 1 | 1 | |
|
Lebanon Middle School Lebanon · New London County |
415 | 1 | 1 | |
|
Lyman Memorial High School Lebanon · New London County |
412 | 3 | 2 | |
|
Middlebury Elementary School Middlebury · New Haven County |
412 | 0 | 0 | |
|
Aquarion-New Fairfield New Fairfield · Fairfield County |
406 | 1 | 1 | |
|
Bethlehem Elementary School/district 14 Bethlehem · Litchfield County |
406 | 2 | 0 | |
|
ST Lukes School New Canaan · Fairfield County |
405 | 3 | 2 | |
|
Wells Road Intermediate School Granby · Hartford County |
405 | 1 | 1 | |
|
Camp Laurelwood Madison · New Haven County |
400 | 2 | 0 | |
|
John Winthrop Junior High School Deep River · Middlesex County |
400 | 1 | 1 | |
|
Nordan LLC Danbury · Fairfield County |
400 | 1 | 0 | |
|
Pomfret School Pomfret · Windham County |
400 | 2 | 1 | |
|
Whelen Engineering CO Chester · Middlesex County |
400 | 1 | 1 | |
|
Rumsey Hall School Washington · Litchfield County |
398 | 1 | 1 | |
|
Aquarion-Meadowbrook Bridgewater, New Milford · Litchfield County |
396 | 0 | 0 | |
|
Aquarion-Arlington Acres Stonington · New London County |
392 | 0 | 0 | |
|
Stony Hill Village Condominium Assn Brookfield · Fairfield County |
392 | 4 | 0 | |
|
Gilead Hill School Hebron · Tolland County |
391 | 0 | 0 | |
|
Aqua Vista Assoc, INC Danbury · Fairfield County |
388 | 0 | 0 | |
|
Scwa, Robin Hill Division (rbn) Montville · New London County |
388 | 0 | 0 | |
|
125-131 Bradley Road Woodbridge Woodbridge · New Haven County |
385 | 0 | 0 | |
|
Antolini Elementary School New Hartford · Litchfield County |
385 | 0 | 0 | |
|
Andover Elementary School Andover · Tolland County |
381 | 1 | 1 | |
|
Church of Latter-Day Saints, Newtown Newtown · Fairfield County |
373 | 0 | 0 | |
|
The Masters School Simsbury · Hartford County |
372 | 0 | 0 | |
|
Aquarion-North Mountain Plainville · Hartford County |
370 | 0 | 0 | |
|
Frederick Brewster School Durham · Middlesex County |
370 | 0 | 0 | |
|
Scwa, Cedar Ridge Division North Stonington · New London County |
370 | 0 | 0 | |
|
Indian Well S.p./south Well Shelton · Fairfield County |
367 | 0 | 0 | |
|
East Hampton Wpca Village Center East Hampton · Middlesex County |
366 | 5 | 0 | |
|
Voluntown Elementary School Voluntown · New London County |
365 | 1 | 1 | |
|
Burr District Elementary School Haddam · Middlesex County |
364 | 1 | 1 | |
|
Barkhamsted Elementary School Barkhamsted · Litchfield County |
360 | 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.