Principal water-use categories in Michigan are thermoelectric-power generation, self-supplied industry, public supply, and irrigation. Water withdrawals for these categories during 1985 were estimated to be 590 million gallons per day. Systematic collection and analysis of water-use data in Michigan began in 1970. From 1970 through 1986, the data-collection efforts focused on compiling and analyzing data collected by various agencies, on statistical surveys of sample populations, and on projecting current withdrawals using estimates of past withdrawals. Legislation was introduced in Michigan in 1987 to improve data collection by requiring reports of all withdrawals greater than 100,000 gallons per day. Four principal water-use categories have been selected for intensive data collection during the next 10 years. Future data acquisition also will include the application of a geographic information system to integrate water-use databases and to analyze water use. These data will be obtained through cooperative studies between the U.S. Geological Survey, the Michigan Department of Natural Resources, and local government agencies. These efforts are expected to result in improvement of the water-use database in Michigan.
Sweat, M.J., 1989, Michigan--Water supply and use, in National Water Summary l987--Hydrologic events and water supply and demand: U.S. Geological Survey Water-Supply Paper 2350, p. 305-312.
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