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 (2012) | 25th percen- tile | Median | Most Recent Instantaneous Value Sep 26 | 75th percen- tile | Mean | Max (1986) |
|---|---|---|---|---|---|---|
| 19.5 | 39 | 72 | 85.0 | 138 | 148 | 2200 |
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: 2025-09-26 16:55:23 EDT
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