Water resources data for the 1974 water year for Connecticut consist of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; and water levels and water quality of wells and springs. This report contains discharge records for 61 gaging stations; stage only records for 3 gaging stations; stage and contents for 36 lakes and reservoirs; water quality for 55 gaging stations, and water levels for 25 observation wells. Also included are 54 low-flow and 61 crest-stage partial-record stations. Additional water data were collected at various sites, not part of the systematic data collection program, and are published as miscellaneous measurements and analyses. These data represent that part of the National Water Data System operated by the U.S. Geological Survey and cooperating local, State, and Federal agencies in Connecticut.