USGS Surface Water for USA: Streamflow Measurements

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Streamflow Measurements for the Nation

Cook County, Illinois

Hydrologic Unit Code 07120004

Latitude 42°09'07", Longitude 87°57'28" NAD83

Drainage area 19.6 square miles

Gage datum 658.28 feet above NAVD88

**Period of record**
Begin Date	End Date	Count
1967-07-12	2025-05-29	489

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U.S. Department of the Interior | U.S. Geological Survey
Title: Surface Water for USA: Streamflow Measurements
URL: https://nwis.waterdata.usgs.gov/nwis/measurements?

Page Contact Information: Illinois Water Data Support Team
Page Last Modified: 2025-07-05 02:24:45 EDT
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