USGS Surface Water for USA: Streamflow Measurements

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Streamflow Measurements for the Nation

Sonoma County, California

Hydrologic Unit Code 18010110

Latitude 38°39'12", Longitude 122°55'34" NAD27

Drainage area 175 square miles

Gage datum 112.03 feet above NAVD88

**Period of record**
Begin Date	End Date	Count
2011-11-10	2025-04-15	153

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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: California Water Data Support Team
Page Last Modified: 2025-05-12 05:36:59 EDT
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