CT · By city

CT tap water quality, city by city

152 cities and towns in CT are served by an active community water system in the EPA's records. Each page below translates that system's EPA-reported history into plain English.

According to EPA SDWIS data, retrieved June 2026.

Andover
Ashford
Avon
Baltic
Bantam
Berlin
Bethel
Bethlehem
Bloomfield
Bolton
Branford
Bridgeport
Bridgewater
Bristol
Broad Brook
Broadbrook
Brookfield
Brooklyn
Burlington
Canterbury
Canton
Chester
Clinton
Cobalt
Colchester
Collinsville
Columbia
Coventry
Cromwell
Danbury
Danielson
Dayville
Durham
East Granby
East Haddam
East Hampton
East Hartford
East Lyme
East Woodstock
Easton
Enfield
Essex
Fairfield
Farmington
Gales Ferry
Glastonbury
Goshen
Granby
Greenwich
Griswold
Groton
Hartford
Harwinton
Jewett City
Kensington
Kent
Killingworth
Lakeville
Lebanon
Ledyard
Litchfield
Lyme
Manchester
Mansfield Center
Marlborough
Mashantucket
Meriden
Middlebury
Middlefield
Middletown
Monroe
Moodus
Morris
Mystic
Naugatuck
New Britain
New Fairfield
New Hartford
New Haven
New Milford
New Preston
Newington
Newtown
Niantic
Noank
Norwalk
Norwich
Oakdale
Oakville
Old Lyme
Oneco
Orange
Plainville
Pomfret
Pomfret Center
Portland
Promfret
Prospect
Putnam
Quaker Hill
Quinebaug
Ridgefield
Rockfall
Rocky Hill
Roxbury
Salisbury
Sandy Hook
Seymour
Sharon
Shelton
Simsbury
South Kent
South Windsor
Southbury
Southfield
Southington
Stafford
Stafford Springs
Stamford
Storrs
Suffield
Tariffville
Thomaston
Thompson
Tolland
Torrington
Trumbull
Uncasville
Uncasville
Vernon
Voluntown
Wallingford
Washington
Washington Depot
Waterbury
Waterford
Watertown
Weatogue
West Hartford
West Haven
West Mystic
Weston
Westport
Wethersfield
Willimantic
Willington
Wilton
Windham
Winsted
Wolcott
Woodbury
Woodstock