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 (1963) | 25th percen- tile | Most Recent Instantaneous Value Feb 22 | Median | Mean | 75th percen- tile | Max (1997) |
|---|---|---|---|---|---|---|
| 25.0 | 228 | 327 | 511 | 902 | 1170 | 6770 |
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: 2026-02-22 05:31:37 EST
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