Water resources data for the 1977 water year for New York consist of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes; stage and contents of reservoirs; water quality of precipitation; and water levels and water quality of ground water. This report (Volume 1) contains discharge records for 192 gaging stations; stage only records for 32 gaging stations (includes 30 lake and reservoir stations and 2 other river stations); stage and contents for 20 other lakes and reservoirs; water quality for 67 gaging stations (includes 4 lake stations), 17 partial-record stations, and 8 precipitation stations; and water levels for 40 observation wells. Also included are 140 crest-stage partial-record stations and 32 low-flow partial-record stations. Additional water data were collected at various sites, not involved in the systematic data collection program, and are published as miscellaneous measurements. These data represent that part of the National Water Data System collected by the U.S. Geological Survey in cooperation with State, Federal, and other agencies in New York.