Water resources data for the 1988 water year for South Carolina consist of records of stage, discharge, and water quality of streams; stage and contents of lakes and reservoirs; and levels of ground-water wells. This volume contains records for water discharge at 104 gaging stations, stage only at 18 gaging stations, stage and contents at 12 lakes and reservoirs, water-quality at 61 gaging stations, and water levels at 43 observation wells. Also included are data for 41 crest-stage partial-record stations and discharge measurement information at 4 locations. Locations of these sites are shown on figures 3, 4, 5, and 6. Additional water data were collected at various sites not involved in the systematic data-collection program. These data represent that part of the National Water Data System collected by the U. S. Geological Survey and cooperating State and Federal agencies in South Carolina.