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 (1964) | 25th percen- tile | Most Recent Instantaneous Value Dec 24 | Median | Mean | 75th percen- tile | Max (2007) |
|---|---|---|---|---|---|---|
| 12.0 | 157 | 306 | 326 | 434 | 528 | 2870 |
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: 2025-12-24 02:02:47 EST
2.27 1.8 vaww01