Water resources data for Iowa for the 1997 water year consists of records of stage, discharge, and water quality of streams; stage, and/or contents of lakes and reservoirs; ground water levels and water quality of ground-water wells. This report contains discharge records for 90 gaging stations; stage or contents for 6 lakes and reservoirs and 3 streams; water quality for 1 stream-gaging station; sediment records for 12 stream-gaging stations; and precipitation record for 6 precipitation stations. Also included are data for 59 crest-stage partial record stations, and 15 low-flow measurement sites on the lower Des Moines River. Additional water data were collected at various sites, but are not part of the systematic data collection program and are published as miscellaneous discharge and miscellaneous water-quality analyses.