Due to a lapse in appropriations, the majority of USGS websites may not be up to date and may not reflect current conditions. Websites displaying real-time data, such as Earthquake and Water and information needed for public health and safety will be updated with limited support. Additionally, USGS will not be able to respond to inquiries until appropriations are enacted.  For more information, please see www.doi.gov/shutdown

Central Midwest Water Science Center


Welcome to the U.S. Geological Survey (USGS) Central Midwest Water Science Center (CMWSC) Web page for the water resources of Illinois, Iowa, and Missouri. Here you'll find information on rivers and streams, groundwater, water quality, and many other topics.

Photo of the Rolla Federal Center, Department of Interior, U.S. Geological Survey

The USGS Central Midwest Water Science Center primarily addresses water issues; maintaining long-term and extensive data-collection networks, and research of water, mapping, biology and geology issues in Illinois, Iowa, and Missouri.