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 (1949) | 25th percen- tile | Median | Mean | 75th percen- tile | Most Recent Instantaneous Value Jun 12 | Max (1967) |
|---|---|---|---|---|---|---|
| 23.0 | 241 | 442 | 718 | 945 | 2020 | 4520 |
U.S. Department of the Interior |
U.S. Geological Survey
Title: USGS Current Conditions for the Nation
URL:
Page Contact Information: Illinois Water Data Support Team
Page Last Modified: 2026-06-12 13:37:19 EDT
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