Connecticut Tap Water Quality
Explore tap water quality data for counties across Connecticut. View water system reports, track violations, monitor drinking water safety, and check fluoridation status in your community.
Total Counties
162
Communities with public water systems
Total Population
2,725,476
Residents served by public water systems
Water Systems
670
Public water systems statewide
Serious Violators
7
Systems with serious violations
Counties
162
With water systems
Population
2,725,476
Served by water systems
Water Systems
670
Total water systems
Violators
7
Systems with serious violations
Searching by your address yields the most accurate results. Searching by town or water system may not show all systems due to how the EPA categorizes data. Some towns may be listed under counties, and water system boundaries don't always align with town boundaries.
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Connecticut Counties
Andover
Population: 74
Water Systems: 2
Ansonia
Population: 23,125
Water Systems: 2
Ashford
Population: 1,008
Water Systems: 8
Avon
Population: 9,117
Water Systems: 3
Barkhamsted
Population: 4,052
Water Systems: 5
Beacon Falls
Population: 25,420
Water Systems: 3
Berlin
Population: 61,195
Water Systems: 7
Bethany
Population: 23,263
Water Systems: 3
Bethel
Population: 20,395
Water Systems: 4
Bethlehem
Population: 140
Water Systems: 2
Bloomfield
Population: 23,275
Water Systems: 5
Bolton
Population: 301
Water Systems: 5
Bozrah
Population: 5,166
Water Systems: 1
Branford
Population: 20,945
Water Systems: 1
Bridgeport
Population: 17,587
Water Systems: 1
Bridgewater
Population: 249
Water Systems: 2
Bristol
Population: 18,645
Water Systems: 3
Brookfield
Population: 24,365
Water Systems: 16
Brooklyn
Population: 3,815
Water Systems: 4
Burlington
Population: 12,107
Water Systems: 4
Canaan
Population: 488
Water Systems: 1
Canterbury
Population: 269
Water Systems: 3
Canton
Population: 1,609
Water Systems: 2
Chaplin
Population: 69
Water Systems: 1
Cheshire
Population: 47,073
Water Systems: 4
Chester
Population: 1,973
Water Systems: 3
Clinton
Population: 7,053
Water Systems: 5
Colchester
Population: 5,444
Water Systems: 8
Columbia
Population: 116
Water Systems: 4
Cornwall
Population: 152
Water Systems: 2
Coventry
Population: 2,940
Water Systems: 10
Cromwell
Population: 43,824
Water Systems: 3
Danbury
Population: 23,324
Water Systems: 17
Darien
Population: 72,509
Water Systems: 4
Deep River
Population: 1,676
Water Systems: 1
Derby
Population: 21,495
Water Systems: 2
Durham
Population: 2,416
Water Systems: 7
East Granby
Population: 37,978
Water Systems: 8
East Haddam
Population: 673
Water Systems: 7
East Hampton
Population: 2,998
Water Systems: 14
East Hartford
Population: 22,993
Water Systems: 1
East Haven
Population: 20,945
Water Systems: 1
East Lyme
Population: 15,245
Water Systems: 1
East Windsor
Population: 15,323
Water Systems: 4
Easton
Population: 17,587
Water Systems: 1
Ellington
Population: 8,971
Water Systems: 1
Enfield
Population: 16,516
Water Systems: 4
Essex
Population: 1,986
Water Systems: 4
Fairfield
Population: 17,587
Water Systems: 1
Farmington
Population: 47,568
Water Systems: 6
Franklin
Population: 5,166
Water Systems: 1
Glastonbury
Population: 35,792
Water Systems: 2
Goshen
Population: 1,636
Water Systems: 3
Granby
Population: 7,048
Water Systems: 2
Greenwich
Population: 84,540
Water Systems: 4
Griswold
Population: 4,539
Water Systems: 6
Groton
Population: 24,350
Water Systems: 7
Guilford
Population: 7,386
Water Systems: 3
Haddam
Population: 38
Water Systems: 1
Hamden
Population: 20,945
Water Systems: 1
Hartford
Population: 22,993
Water Systems: 1
Harwinton
Population: 9,518
Water Systems: 2
Hebron
Population: 2,794
Water Systems: 8
Kent
Population: 2,107
Water Systems: 5
Killingly
Population: 4,074
Water Systems: 7
Killingworth
Population: 837
Water Systems: 2
Lebanon
Population: 5,925
Water Systems: 7
Ledyard
Population: 26,965
Water Systems: 9
Lisbon
Population: 8,999
Water Systems: 6
Litchfield
Population: 10,806
Water Systems: 6
Madison
Population: 8,267
Water Systems: 3
Manchester
Population: 45,187
Water Systems: 4
Mansfield
Population: 50,077
Water Systems: 21
Marlborough
Population: 2,005
Water Systems: 7
Meriden
Population: 32,633
Water Systems: 2
Middlebury
Population: 27,387
Water Systems: 5
Middlefield
Population: 13,960
Water Systems: 6
Middletown
Population: 20,815
Water Systems: 4
Milford
Population: 20,945
Water Systems: 1
Monroe
Population: 17,625
Water Systems: 2
Montville
Population: 19,447
Water Systems: 25
Morris
Population: 90
Water Systems: 2
Naugatuck
Population: 5,791
Water Systems: 2
New Britain
Population: 14,772
Water Systems: 2
New Canaan
Population: 47,883
Water Systems: 5
New Fairfield
Population: 3,712
Water Systems: 13
New Hartford
Population: 12,995
Water Systems: 4
New Haven
Population: 20,945
Water Systems: 1
New London
Population: 19,336
Water Systems: 2
New Milford
Population: 9,972
Water Systems: 17
Newington
Population: 39,474
Water Systems: 4
Newtown
Population: 26,913
Water Systems: 5
Norfolk
Population: 913
Water Systems: 1
North Branford
Population: 21,143
Water Systems: 3
North Canaan
Population: 1,481
Water Systems: 1
North Haven
Population: 39,578
Water Systems: 2
North Stonington
Population: 2,309
Water Systems: 3
Norwalk
Population: 42,835
Water Systems: 4
Norwich
Population: 5,797
Water Systems: 3
Old Lyme
Population: 4,729
Water Systems: 10
Old Saybrook
Population: 6,795
Water Systems: 1
Orange
Population: 21,495
Water Systems: 2
Oxford
Population: 4,673
Water Systems: 3
Plainfield
Population: 3,580
Water Systems: 8
Plainville
Population: 30,900
Water Systems: 4
Plymouth
Population: 17,916
Water Systems: 3
Pomfret
Population: 850
Water Systems: 5
Portland
Population: 25,682
Water Systems: 4
Preston
Population: 5,796
Water Systems: 3
Prospect
Population: 48,517
Water Systems: 4
Putnam
Population: 2,687
Water Systems: 2
Redding
Population: 17,587
Water Systems: 1
Ridgefield
Population: 41,906
Water Systems: 8
Rocky Hill
Population: 23,231
Water Systems: 2
Roxbury
Population: 36
Water Systems: 1
Salem
Population: 337
Water Systems: 4
Salisbury
Population: 2,520
Water Systems: 3
Seymour
Population: 40,772
Water Systems: 4
Sharon
Population: 865
Water Systems: 2
Shelton
Population: 17,587
Water Systems: 1
Sherman
Population: 155
Water Systems: 1
Simsbury
Population: 10,562
Water Systems: 4
Somers
Population: 7,725
Water Systems: 3
South Windsor
Population: 44,978
Water Systems: 4
Southbury
Population: 3,744
Water Systems: 4
Southington
Population: 62,031
Water Systems: 6
Sprague
Population: 1,058
Water Systems: 1
Stafford
Population: 3,302
Water Systems: 3
Stamford
Population: 93,705
Water Systems: 5
Sterling
Population: 308
Water Systems: 1
Stonington
Population: 4,433
Water Systems: 3
Stratford
Population: 17,587
Water Systems: 1
Suffield
Population: 9,566
Water Systems: 2
Thomaston
Population: 1,894
Water Systems: 1
Thompson
Population: 4,028
Water Systems: 7
Tolland
Population: 11,109
Water Systems: 8
Torrington
Population: 10,510
Water Systems: 2
Trumbull
Population: 17,622
Water Systems: 2
Vernon
Population: 22,143
Water Systems: 5
Voluntown
Population: 258
Water Systems: 2
Wallingford
Population: 51,266
Water Systems: 3
Warren
Population: 84
Water Systems: 1
Washington
Population: 1,370
Water Systems: 8
Waterbury
Population: 31,706
Water Systems: 4
Waterford
Population: 20,166
Water Systems: 4
Watertown
Population: 32,096
Water Systems: 4
West Hartford
Population: 35,248
Water Systems: 2
West Haven
Population: 20,945
Water Systems: 1
Westbrook
Population: 6,845
Water Systems: 2
Weston
Population: 17,687
Water Systems: 2
Westport
Population: 27,651
Water Systems: 2
Wethersfield
Population: 22,993
Water Systems: 1
Willington
Population: 1,822
Water Systems: 10
Wilton
Population: 38,151
Water Systems: 3
Winchester
Population: 3,892
Water Systems: 1
Windham
Population: 11,054
Water Systems: 3
Windsor
Population: 22,993
Water Systems: 1
Windsor Locks
Population: 31,964
Water Systems: 2
Wolcott
Population: 58,925
Water Systems: 9
Woodbridge
Population: 23,125
Water Systems: 2
Woodbury
Population: 2,919
Water Systems: 8
Woodstock
Population: 3,606
Water Systems: 9