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Browse Water Systems

10,863 public water systems in CT.

Public Water Systems Database

Browse 10,863 EPA-regulated public water systems with identifiers, population served, and water source type. Use the filters below to narrow results by state, system type, or name.

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System Name PWSID State Type Population Served
REGIONAL WATER AUTHORITY CT0930011 Connecticut Community 418,900
METROPOLITAN DISTRICT COMMISSION CT0640011 Connecticut Community 390,887
AQUARION-EASTERN FAIRFIELD COUNTY CT0150011 Connecticut Community 351,756
AQUARION-STAMFORD CT1350011 Connecticut Community 119,214
WATERBURY WATER DEPARTMENT CT1510011 Connecticut Community 107,271
CTWC - NORTHERN REG-WESTERN SYSTEM CT0473011 Connecticut Community 101,313
NEW BRITAIN WATER DEPARTMENT CT0890011 Connecticut Community 73,534
DANBURY WATER DEPARTMENT CT0340011 Connecticut Community 62,055
MANSFIELD CT0000251 Connecticut Community 60,000
MERIDEN WATER DIVISION CT0800011 Connecticut Community 58,441
AQUARION-GREENWICH CT0570011 Connecticut Community 53,297
BRISTOL WATER DEPARTMENT CT0170011 Connecticut Community 52,079
MANCHESTER WATER DEPARTMENT CT0770021 Connecticut Community 51,198
SOUTHINGTON WATER DEPARTMENT CT1310011 Connecticut Community 43,069
SOUTH NORWALK ELECTRIC & WATER CT1030021 Connecticut Community 42,000
MIDDLETOWN WATER DEPARTMENT CT0830011 Connecticut Community 41,019
NORWALK FIRST TAXING DISTRICT CT1030011 Connecticut Community 40,256
TORRINGTON WATER COMPANY CT1430011 Connecticut Community 37,915
WALLINGFORD WATER DEPARTMENT CT1480011 Connecticut Community 37,267
NORWICH PUBLIC UTILITIES CT1040011 Connecticut Community 36,163
AQUARION WATER/NH NH1051010 Connecticut Community 34,000
CTWC - SHORELINE REGION-GUILFORD SYSTEM CT0608011 Connecticut Community 33,975
Mohegan Tribal Utility Authority 010109005 Connecticut Community 31,961
GROTON UTILITIES CT0590011 Connecticut Community 30,200
REGIONAL WATER AUTHORITY-ANSONIA CT0020021 Connecticut Community 29,600
NEW LONDON DEPT. OF PUBLIC UTILITIES CT0950011 Connecticut Community 27,620
UNIVERSITY OF CONNECTICUT - MAIN CAMPUS CT0780021 Connecticut Community 27,199
Mashantucket Pequot Water System 010106001 Connecticut Community 26,445
CTWC - NAUGATUCK REGION-CENTRAL SYSTEM CT0880011 Connecticut Community 22,735
WINDHAM WATER WORKS CT1630011 Connecticut Community 21,214
AQUARION-DARIEN CT0350011 Connecticut Community 18,737
HAZARDVILLE WATER COMPANY CT0490021 Connecticut Community 18,544
AQUARION-PLAINVILLE REGIONAL CT1100011 Connecticut Community 18,231
MASHANTUCKET PEQUOT TRIBAL NATION CT0723011 Connecticut Community 17,050
WATERFORD WPCA CT1520071 Connecticut Community 16,578
EAST LYME WATER & SEWER COMMISSION CT0450011 Connecticut Community 15,245
CTWC - UNIONVILLE SYSTEM CT0520011 Connecticut Community 14,693
AQUARION-SIMSBURY REGIONAL CT1280021 Connecticut Community 14,691
CROMWELL FIRE DISTRICT WATER DEPARTMENT CT0330011 Connecticut Community 14,316
AQUARION-NEW MILFORD REGIONAL CT0960011 Connecticut Community 13,331
AQUARION-VALLEY CT1240011 Connecticut Community 13,080
AVON WATER CO CT0040011 Connecticut Community 11,590
AQUARION-MYSTIC CT1370011 Connecticut Community 10,788
AQUARION-NEW CANAAN CT0900011 Connecticut Community 10,097
WATERTOWN WATER & SEWER AUTHORITY CT1530021 Connecticut Community 9,972
BETHEL WATER DEPT CT0090011 Connecticut Community 9,507
WINSTED WATER DEPT CT1500000 Connecticut Community 8,954
WINSTED WATER WORKS CT1620011 Connecticut Community 7,784
KENSINGTON FIRE DISTRICT CT0070011 Connecticut Community 7,553
AQUARION-RIDGEFIELD CT1180011 Connecticut Community 7,476