Streamflow information saves lives and protects property during floods. Information on the streamflow in the Nation's rivers also helps to ensure adequate water resources for a healthy environment and economy. The U.S. Geological Survey (USGS) operates and maintains a national network of over 7,000 streamgages.
NWS River Forecasts
| Min (1949) | 25th percen- tile | Most Recent Instantaneous Value Dec 4 | Median | Mean | 75th percen- tile | Max (1983) |
|---|---|---|---|---|---|---|
| 10.0 | 173 | 266 | 335 | 548 | 558 | 5780 |
U.S. Department of the Interior |
U.S. Geological Survey
Title: USGS Current Conditions for Illinois
URL:
Page Contact Information: Illinois Water Data Support Team
Page Last Modified: 2025-12-04 03:51:11 EST
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