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Publication Abstract

Ground-water Levels and Pumpage in the Metro-East Area, Illinois, 1986 - 1990 Schicht, Richard J., and Andrew G. Buck, 1995  Illinois State Water Survey, Champaign, IL,  ISWS C-180    Full Text Available
This report discusses groundwater levels and pumpage in the Metro-East area just south of Alton, Illinois, to Dupo, Illinois, and between the Mississippi River and the river bluffs from 1986-1990. Large quantities of groundwater, primarily for industrial and municipal use, are withdrawn from wells penetrating a sand-and-gravel aquifer along the valley lowlands of the Mississippi River.

Groundwater pumpage declined from 62.8 million gallons per day (mgd) in 1986 to 58.7 mgd in 1990. Of the total 1990 pumpage, 76.2 percent (or 44.7 mgd) was industrial; 20.8 percent (or 12.2 mgd) was for public water supplies; 2.0 percent (or 1.2 mgd) was for irrigation; and 1.0 percent (or 0.6 mgd) was for domestic use. Pumpage in the Metro-East area is concentrated at five major pumping centers (Alton, Wood River, Roxana, National City, and Granite City) and four minor pumping centers (Poag, Glen Carbon, Collinsville, and Venice). Pumpage in the Sauget (Monsanto) area, once considered a minor pumping center, was negligible in 1990 because of declining industrial use.

Groundwater levels throughout the entire area were stable but elevated during 1986 and 1987. Water levels declined from 1988 to 1989 and increased in 1990. Factors contributing to this pattern were above normal precipitation, the Midwestern drought of 1988-1989, changes in river stages, and the response of water levels to annual pumpage changes.

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