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Citation
| Avery, C., 1995, Reversal of declining ground-water levels in the Chicago area, U.S. Geological Survey Fact Sheet 222-95. |
Abstract
| Abundant water resources have been an important part of the economic development of the Chicago area (fig. 1) for more than a century. The city of Chicago, Ill., and other lakefront towns have used Lake Michigan as a water supply. Where water from Lake Michigan was not available or a need for supplemental water supplies was present, deep wells (generally greater than 700 feet) provided a clean, reliable, and abundant water supply Reversal of Declining Ground-Water Levels in the Chicago Area from the Cambrian-Ordovician aquifer. Public water suppliers withdraw the most ground water in the eight-county Chicago area (Cook, Du Page, Grundy, Kane, Kendall, Lake, McHenry, and Will Counties) (fig. 2). This report describes a reversal in the trend of declining ground-water levels in the Cambrian-Ordovician aquifer in the Chicago area as public water suppliers have converted from the withdrawal of ground water from wells to the withdrawal of surface water from Lake Michigan. |
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