Water Resources of Illinois
Welcome to the USGS Illinois Water Science Center. These pages are your source for water-resource information collected and interpreted
by the U.S. Geological Survey in Illinois.
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Current Streamflow Conditions
On the map to the left, point to one of the stream-monitoring locations to see a summary of current streamflow conditions, or click elsewhere on the map to open a larger view.
USGS WaterAlert
Subscribe to
WaterAlert to receive daily or hourly updates about current conditions in rivers, lakes, and groundwater when
they match conditions of concern to you.
USGS WaterNow
Send an email or text message
to WaterNow@usgs.gov containing a USGS current-conditions gaging site number and quickly receive a reply with its most recent observation(s). Get more information about
USGS WaterNow.
Quick Link to Real-Time Data:
View site list: SW |
GW |
WQ
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Illinois Highlights
Initial Results from a Reconnaissance of Cyanobacteria and Associated Toxins in Illinois, August-October 2012
During the drought of 2012, cyanobacteria was recognized to be a concern in Illinois lakes and rivers.
The USGS and the Illinois Environmental Protection Agency completed a reconnaissance data collection
effort and have published an Open-File Report summarizing initial results of the currently
available data in support of a public meeting. Stay tuned to this website for additional developments.
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Drought of 2012
The Drought of 2012 is affecting streamflow conditions and other hydrologic parameters in Illinois. The USGS Illinois Water Science Center is providing important water-resources data to water management officials, the public, and researchers during the Drought of 2012. You can access the data directly through the sidebar on the left for the most recent data. Or you can go through a map interface for real-time streamflow, precipitation, and water quality, and all groundwater measurements by clicking which type of data you would like. Additionally, field staff from the Illinois Water Science Center have been collecting low-flow discharge measurements and observations from streams throughout Illinois. Download and view the measurements and observations spreadsheet.
For more in-depth drought information, visit the Illinois Water Science Center Drought Page.
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