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.
| Min (1941) | 25th percen- tile | Median | Mean | Most Recent Instantaneous Value Oct 15 | 75th percen- tile | Max (1982) |
|---|---|---|---|---|---|---|
| 18.0 | 42 | 64 | 102 | 107 | 116 | 864 |
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: 2026-10-15 06:41:57 EDT
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