All water systems in Connecticut
2,334 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
The Lake House Wolcott · New Haven County |
300 | 0 | 0 | |
|
The Rectory School Pomfret · Windham County |
300 | 2 | 1 | |
|
Arrowhead Point Homeowners Assn Inc. Brookfield, New Fairfield · Fairfield County |
296 | 0 | 0 | |
|
Brunswick School (upper Middle) Greenwich · Fairfield County |
295 | 3 | 0 | |
|
Chadwick Homeowners Assn., Inc. Old Lyme · New London County |
292 | 1 | 1 | |
|
The Weston Field Club Well #1 Weston · Fairfield County |
291 | 8 | 1 | |
|
Arrowhead by the Lake Association, Inc. Wolcott · New Haven County |
288 | 0 | 0 | |
|
Macedonia Brook S.p./camp Site #30 Kent · Litchfield County |
287 | 0 | 0 | |
|
Aquarion-Oakwood Acres New Fairfield · Fairfield County |
286 | 1 | 1 | |
|
John Lyman School Middlefield · Middlesex County |
285 | 1 | 0 | |
|
Old Farms Condominium Association INC New Milford · Litchfield County |
285 | 3 | 0 | |
|
Chaplin Elementary School Chaplin · Windham County |
280 | 1 | 1 | |
|
Eastbury School Glastonbury · Hartford County |
280 | 2 | 2 | |
|
Torrington Country Club Goshen · Litchfield County |
280 | 1 | 0 | |
|
Colchester Estates Colchester · New London County |
276 | 6 | 2 | |
|
Walden Apartments Willington · Tolland County |
276 | 2 | 2 | |
|
West Hill Lake Water Assoc. New Hartford · Litchfield County |
276 | 1 | 0 | |
|
Crystal Lake School Ellington · Tolland County |
275 | 2 | 1 | |
|
Parkway School Greenwich · Fairfield County |
275 | 1 | 0 | |
|
Whitcraft LLC Eastford · Windham County |
272 | 1 | 1 | |
|
Moosup Garden Apartments Plainfield · Windham County |
270 | 0 | 0 | |
|
St. Thomas More School-Main System Montville · New London County |
270 | 2 | 0 | |
|
Pine Point School-Campbell Stonington · New London County |
267 | 4 | 2 | |
|
Pine Point School-Mitchell Stonington · New London County |
267 | 5 | 1 | |
|
Marianapolis Prep School Admin/school Thompson · Windham County |
266 | 3 | 3 | |
|
Aquarion-Forest Hills New Milford · Litchfield County |
265 | 1 | 1 | |
|
Ctwc Banner Village East Haddam · Middlesex County |
265 | 0 | 0 | |
|
Bridgewater Plaza Convenience Store Bridgewater · Litchfield County |
262 | 2 | 1 | |
|
St. Thomas More School-Fieldhouse Montville · New London County |
260 | 0 | 0 | |
|
The Grumman Hill Montessori Association Wilton · Fairfield County |
259 | 2 | 2 | |
|
James Morris School Morris · Litchfield County |
258 | 0 | 0 | |
|
Woodbury Knoll, Llc. Woodbury · Litchfield County |
258 | 3 | 1 | |
|
Tranquility Vineyard and Winery Middlebury · New Haven County |
257 | 0 | 0 | |
|
Matulaitis Nursing Home Putnam · Windham County |
254 | 2 | 1 | |
|
Ctwc Westchester Village Colchester · New London County |
252 | 0 | 0 | |
|
Harvest Time Assembly of God Greenwich · Fairfield County |
250 | 0 | 0 | |
|
Johnson Memorial Hospital, INC Stafford · Tolland County |
250 | 1 | 1 | |
|
Rogers Corp Rogers Well Killingly · Windham County |
250 | 1 | 0 | |
|
South Broad Street Service Area Wallingford · New Haven County |
250 | 1 | 0 | |
|
Pine Grove Association, Inc. Canaan · Litchfield County |
248 | 1 | 0 | |
|
Washington Primary School Washington · Litchfield County |
247 | 2 | 1 | |
|
Devereux Glenholme School Main Campus Washington · Litchfield County |
245 | 2 | 1 | |
|
Aquarion-Indian Spring Danbury · Fairfield County |
242 | 0 | 0 | |
|
Apple Rehab Rocky Hill · Hartford County |
238 | 6 | 2 | |
|
Ctwc Uconn Hunting Lodge Div. Mansfield · Tolland County |
234 | 0 | 0 | |
|
Candle Hill Mobile Home Park New Milford · Litchfield County |
233 | 4 | 0 | |
|
Pequot Ledge Campground Montville · New London County |
231 | 2 | 1 | |
|
Ctwc Pilgrim Hills Division Coventry · Tolland County |
229 | 0 | 0 | |
|
South Kent School Kent · Litchfield County |
228 | 3 | 1 | |
|
Ctwc Chimney Hill Farmington · Hartford County |
227 | 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.