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 (1945) | 25th percen- tile | Median | Mean | Most Recent Instantaneous Value Jan 1 | 75th percen- tile | Max (1973) |
|---|---|---|---|---|---|---|
| 12.0 | 147 | 294 | 562 | 691 | 703 | 3270 |
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: 2026-01-01 02:19:33 EST
2.43 2.03 sdww01