Water levels, locations, depths, and aquifers tapped are given for 112 observation wells. Tabulated data include extremes of water levels for calendar year 1987 and for the period of record, pumpage of most major ground-water users in the State, and water-quality data from selected wells. The largest municipal user of ground water, the city of Lansing, pumped 7.8 billion gallons from the Saginaw Formation and glacial deposits in 1987. SUPERIOR 46 78 EXPLANATION WELL AT WHICH WATER-QUALITY DATA WAS COLLECTED-Number indicates last two digits of year data was collected 20 40 60 80 MILES 0 20 40 60 80 100 KILOMETERS Base from U.S. Geological Survey 1:500,000 map LAKE ERIE Figure 2. Water-quality sampling sites and year sample collected. (Water-quality data are given in the Michigan annual ground-water report for year in which sample was collected Data for the years 1975-76 are in the annual report for 1977.) Ground-Water Records and Reports Tabulations of water-level measurements, hydrographs of observation wells, chemical analyses, water-temperature measurements, well records and logs, aquifer tests, records of pumping for public and industrial supplies, and water resources reports are on file for public inspection.
Water levels, locations, depths, and aquifers tapped are given for 107 observation wells. Tabulated data include a listing of ground-water reports in Michigan, extremes of water levels for calendar year 1990 and for the period of record, pumpage of most major ground-water users in the State, and a map showing previous collected water-quality data from selected wells. In 1990, the two largest municipal users of ground water were Lansing and Kalamazoo. Lansing pumped 7.2 billion gallons from the Saginaw Formation and glacial deposits; Kalamazoo pumped 7.0 billion gallons from glacial deposits only. Ground-Water Records and ReportsTabulations and compilations of water-level measurements, hydrographs of ground-water wells, results of chemical analyses, water-temperature measurements, well records and logs, aquifer tests, records of pumping for public and industrial supplies, and water-resources reports are on file for public inspection.
Purpose and scope-; 2 Use of groundwater data 2 Groundwater records and reports 5 Well-numbering system Acknowledgments Groundwater levels Groundwater
Water levels, locations, depths, and aquifers tapped are given for 108 observation wells. Tabulated data include a listing of groundwater reports in Michigan, extremes of water levels for calendar year 1989 and for the period of record, pumpage of most major groundwater users in the State, and water-quality data from selected wells. In 1989, the two largest municipal users of ground water were Lansing and Kalamazoo. Lansing pumped 7.2 billion gallons from the Saginaw Formation and glacial deposits; Kalamazoo pumped 6.7 billion gallons from glacial deposits only. GroundWater Records and Reports Tabulations of water-level measurements, hydrographs of observation wells, chemical analyses, water-temperature measurements, well records and logs, aquifer tests, records of pumping for public and industrial supplies, and water-resources reports are on file for public inspection. They can be
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