Skip to main content
U.S. flag

An official website of the United States government

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.

 

News

Friday's Findings: Environmental Contaminants and Agricultural Production

Friday's Findings: Environmental Contaminants and Agricultural Production

StreamStats regression equation updates for Illinois

StreamStats regression equation updates for Illinois

Southeast Region (SER) Science Workshop: Identifying Science to Meet Administration Priorities and the Needs of Our Stakeholders

Southeast Region (SER) Science Workshop: Identifying Science to Meet Administration Priorities and the Needs of Our Stakeholders

Publications

Simulation of hydrodynamics and water temperature in a 21-mile reach of the upper Illinois River, Illinois, 2020–22

This report describes the development of a CE-QUAL-W2 river hydrodynamics and temperature model of a 21-mile reach of the Illinois River including a 3-mile reach of a major tributary, the Fox River. Model outputs consist of streamflow, water velocity, water-surface elevation, and water-temperature time series that can be used to simulate summer conditions in years with and without extensive develo
Authors
Michael R. Ament, David C. Heimann

Special Contributing Area Loading Program user’s manual

The Special Contributing Area Loading Program (SCALP) is a hydrologic routing program that simulates reservoir routing through a linear-reservoir-in-series method. The Java version of SCALP was developed to replicate and replace the functionality of an older version of the program written in Fortran. SCALP models flow through three reservoirs in series using an input runoff depth time series and i
Authors
Henry F. Doyle, Marian M. Domanski

Evaluation of metrics and thresholds for use in national-scale river harmful algal bloom assessments

The spatiotemporal distribution of harmful algal blooms (HABs) in rivers remains poorly understood, and there is an urgent need to develop a consistent set of metrics to better document HAB occurrences and forecast future events. Using data from seven sites in the Illinois River Basin, we computed metrics focused on HAB conditions related to excess algal growth and hypoxia. Daily mean chlorophyll
Authors
Sarah M. Stackpoole, Jacob Aaron Zwart, Jennifer L. Graham, Judson Harvey, Noah Schmadel, Jennifer C. Murphy

Science

A National Assessment of Pesticide, PFAS, Microplastic, and Antibiotic Resistance Gene Exposures in White-Tailed Deer

Research has documented exposures and consequential environmental health effects of pesticides, PFAS, microplastics, and antibiotic resistance genes in environmental biota. Little is known, however, regarding such effects in white-tailed deer ( Odocoileus virginianus ).
link

A National Assessment of Pesticide, PFAS, Microplastic, and Antibiotic Resistance Gene Exposures in White-Tailed Deer

Research has documented exposures and consequential environmental health effects of pesticides, PFAS, microplastics, and antibiotic resistance genes in environmental biota. Little is known, however, regarding such effects in white-tailed deer ( Odocoileus virginianus ).
Learn More

Groundwater Monitoring in McHenry County, Illinois

Groundwater Monitoring in McHenry County, Illinois
link

Groundwater Monitoring in McHenry County, Illinois

Groundwater Monitoring in McHenry County, Illinois
Learn More

Airborne Electromagnetic (AEM) Survey 2023 - Illinois River Basin

The U.S. Geological Survey (USGS) is conducting an Airborne ElectroMagnetic (AEM) Survey starting in late January 2023 and lasting three to four weeks. A helicopter towing a large hoop from a cable will begin making low-level flights over the Illinois River Basin, covering much of central Illinois and parts of northwest Indiana.
link

Airborne Electromagnetic (AEM) Survey 2023 - Illinois River Basin

The U.S. Geological Survey (USGS) is conducting an Airborne ElectroMagnetic (AEM) Survey starting in late January 2023 and lasting three to four weeks. A helicopter towing a large hoop from a cable will begin making low-level flights over the Illinois River Basin, covering much of central Illinois and parts of northwest Indiana.
Learn More

Multimedia

A USGS hydrologic technician prepares to lift an orange streamflow measuring device onto the ledge of a bridge.
Measuring flooding in the South Grand River in Urich, Missouri
Measuring flooding in the South Grand River in Urich, Missouri
A USGS hydrologic technician on a bridge guides an orange streamflow measuring device across a river to measure flooding
Measuring flooding in the South Grand River in Urich, Missouri
Measuring flooding in the South Grand River in Urich, Missouri
Paul H Rydlund
Paul new profile picture.
Paul new profile picture.
Video thumbnail reads: NGWOS AEMs for Illinois. Aerially Mapping The Illinois River Basin NGWOS AEMs For Illinois - Aerially Mapping the Illinois River Basin
NGWOS AEMs For Illinois - Aerially Mapping the Illinois River Basin
Video thumbnail reads: NGWOS AEMs for Illinois. Aerially Mapping The Illinois River Basin. Audio Description. NGWOS AEMs For Illinois - Aerially Mapping the Illinois River Basin (AD)
NGWOS AEMs For Illinois - Aerially Mapping the Illinois River Basin (AD)
Graphic of Gage Greatness bracket showing 16 gages from 8 water science centers.
Gage Greatness Bracket Round 1
Gage Greatness Bracket Round 1
Illinois River Basin Airborne Electromagnetic Study Area
Illinois River Basin Airborne Electromagnetic Survey Area
Illinois River Basin Airborne Electromagnetic Survey Area
Woman in orange vest, pink hat and camouflage outfit smiles behind hunted deer
NPS biological technician with white-tailed deer
NPS biological technician with white-tailed deer
Man and child in camouflage smiling for camera with hunted deer in foreground
USGS research biologist and son with white-tailed deer
USGS research biologist and son with white-tailed deer