Public Water Systems in Connecticut: Full List (30)

Public water system	Population served
REGIONAL WATER AUTHORITY	418,900
METROPOLITAN DISTRICT COMMISSION	390,887
WATERBURY WATER DEPARTMENT	107,271
NEW BRITAIN WATER DEPARTMENT	73,534
DANBURY WATER DEPARTMENT	62,055
MERIDEN WATER DIVISION	58,441
BRISTOL WATER DEPARTMENT	52,079
MANCHESTER WATER DEPARTMENT	51,198
SOUTHINGTON WATER DEPARTMENT	43,069
SOUTH NORWALK ELECTRIC & WATER	42,000
MIDDLETOWN WATER DEPARTMENT	41,019
NORWALK FIRST TAXING DISTRICT	40,256
WALLINGFORD WATER DEPARTMENT	37,267
NORWICH PUBLIC UTILITIES	36,163
GROTON UTILITIES	30,200
NEW LONDON DEPT. OF PUBLIC UTILITIES	27,620
UNIVERSITY OF CONNECTICUT - MAIN CAMPUS	27,199
WINDHAM WATER WORKS	21,214
WATERFORD WPCA	16,578
EAST LYME WATER & SEWER COMMISSION	15,245
CROMWELL FIRE DISTRICT WATER DEPARTMENT	14,316
WATERTOWN WATER & SEWER AUTHORITY	9,972
BETHEL WATER DEPT	9,507
WINSTED WATER WORKS	7,784
KENSINGTON FIRE DISTRICT	7,553
PUTNAM WATER POLLUTION CONTROL AUTHORITY	7,300
WATERTOWN FIRE DISTRICT	6,718
BERLIN WATER CONTROL COMMISSION	5,128
PORTLAND WATER DEPARTMENT	5,010
COLCHESTER SEWER & WATER COMMISSION	4,020

Largest first by population served, as each employer reports it to its federal registry.

Source: U.S. Environmental Protection Agency, Safe Drinking Water Information System (SDWIS/Fed), community water systems. Data captured October 2, 2026.

Jobs at public water systems