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.
Working With Us
The USGS offers a variety of ways to interact with us and our science. Come explore the following information about doing business with us, partnering with our science programs, and being part of the USGS workforce.
Director's Message
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.