Central Midwest Water Science Center


Welcome to the Central Midwest Water Science Center’s (CMWSC) Website. We offer information on streamflow, water quality, water-use, and groundwater data for Illinois, Iowa, and Missouri. We conduct unbiased, scientific hydrologic investigations & research projects to effectively manage CMWSC and our Nation's water resources through joint efforts with our partners.

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Date published: May 12, 2020

USGS Responds to Spring Flooding

U.S. Geological Survey field crews are measuring flooding across the country as spring weather is in full swing. Warming temperatures, increased precipitation and snowmelt have caused moderate to major flooding in the upper Midwest, East Coast, Central Plains and the Southeast portions of the country.

Date published: September 20, 2019

USGS Mobile Water Quality Sensor on Mississippi River Boat

U.S. Geological Survey expands its network of water-quality sensors to include the American Queen Steamboat as she travels the entire length of the Mississippi River collecting nutrient levels and water-quality data along the way.  (Image Courtesy: Iowa Public Radio, Iowa City, Iowa, limited use USGS only)

Date published: May 10, 2019

Media Advisory: USGS Assesses Iowa Flood Levels for Emergency Preparedness

Reporters: Do you want to accompany a USGS field crew as they inspect high-water marks? Please contact Marisa Lubeck or Paul Rydlund. 


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Year Published: 2020

Missouri StreamStats—St. Louis County and the City of St. Louis urban application

To address a major limitation of the functionality of the Missouri statewide StreamStats application in the urban areas of St. Louis County and the City of St. Louis, Missouri, the U.S. Geological Survey, in cooperation with the Metropolitan St. Louis Sewer District, defined watershed boundaries and hydrography for the study area using high-...

Southard, Rodney E.; Haluska, Tana; Richards, Joseph M.; Ellis, Jarrett T.; Dartiguenave, Christine; Djokic, Dean
Southard, R.E., Haluska, T., Richards, J.M., Ellis, J.T., Dartiguenave, C., and Djokic, D., 2020, Missouri StreamStats—St. Louis County and the City of St. Louis urban application: U.S. Geological Survey Scientific Investigations Report 2020–5040, 27 p., https://doi.org/10.3133/sir20205040.

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Year Published: 2020

Trends in nutrient and soil loss in Illinois rivers, 1978–2017

Nutrient and soil loss, defined herein as the loss of nutrients or soil to streams and other downstream receiving waters, affect watersheds around the globe. Although governments make large investments mitigating nutrient and soil loss through watershed management efforts, the efficacy of these efforts is often difficult to assess, in part because...

Hodson, Timothy O.; Terrio, Paul J.
Hodson, T.O., and Terrio, P.J., 2020, Trends in nutrient and soil loss in Illinois rivers, 1978–2017: U.S. Geological Survey Scientific Investigations Report 2020–5041, 26 p., https://doi.org/10.3133/sir20205041.

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Year Published: 2020

Evaluating the potential role of bioactive chemicals on the distribution of invasive Asian carp upstream and downstream from river mile 278 in the Illinois waterway

Two non-native carp species have invaded the Illinois Waterway and are a threat to Great Lakes ecosystems. Poor water quality in the upper Illinois Waterway, may be a factor contributing to the stalling of the carp population front near river mile 278. In 2015, the U.S. Geological Survey collected 4 sets of water samples from two sites upstream...

Battaglin, William A.; Duncker, James J.; Terrio, Paul J.; Bradley, Paul; Barber, Larry; DeCicco, Laura A.