Illinois Water Science Center
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ABOUT THE ILLINOIS
Hydrologic Information and Data for Illinois
The U.S. Geological Survey currently operates over 300 data collection sites in Illinois for acquiring information on surface-water, ground-water, water-quality, and precipitation. About 200 of the sites are equipped with satellite telemetry, which provides real-time data via GOES satellites and downlinks, which enables the posting of data to the Web for public dissemination.Some links on this page are presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.