Water resources data for Iowa for the 1994 water year consist of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; ground water levels and water quality of ground-water wells. This report contains discharge records for 115 gaging stations; stage or contents for 8 lakes and reservoirs; water quality for 6 stream-gaging stations; sediment records for 11 stream-gaging stations; water levels for 232 observation wells; and chemical analyses for 101 municipal wells. Also included are data for 93 crest-stage partial-record stations. Additional water data were collected at various sites, but are not part of the systematic datacollection program and are published as miscellaneous discharge measurements and miscellaneous water-quality analyses.