Areal Studies Aid Protection of Ground-water Quality in Illinois, Indiana, and Wisconsin

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Water-resources Investigations Report

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A Cross-site Comparison of Methods Used for Hydrogeologic Characterization of the Galena-Platteville Aquifer in Illinois and Wisconsin, with Examples from Selected Superfund Sites

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Publications of the Geological Survey

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Hydrogeology and Simulation of Ground-water Flow in the Aquifers Underlying Belvidere, Illinois

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New Publications of the Geological Survey

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Monthly Catalog of United States Government Publications

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New Publications of the U.S. Geological Survey

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Geohydrology, Water Levels and Directions of Flow, and Occurrence of Light-nonaqueous-phase Liquids on Ground Water in Northwestern Indiana and the Lake Calumet Area of Northeastern Illinois

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Selected Water-quality Characteristics and Flow of Ground Water in the San Luis Basin, Including the Conejos River Subbasin, Colorado and New Mexico

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