Water resources data for the 1975 water year for Michigan consist of records stage, discharge, and water quality of streams; stage, contents, and water qualit of lakes and reservoirs; and water levels and water quality in wells and springs. This report contains discharge records for 207 gaging stations; stage only record for 1 gaging station; stage and contents for 5 lakes and reservoirs; water quality for 57 continuous—record stations, 169 partial—record stations, and 3 lakes; and water levels for 29 observation wells. Also included are 104 crest— stage partial—record stations and 43 low—flow partial—record stations. Additiona water data were collected at various sites, not part of the systematic data coll tion program, and are published as miscellaneous measurements. These data repre that part of the National Water Data System operated by the U.S. Geological Sury and cooperating State and Federal agencies in Michigan.