USGS Surface Water for USA: Streamflow Measurements

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Explore the NEW USGS National Water Dashboard interactive map to access real-time water data from over 13,500 stations nationwide.

Streamflow Measurements for the Nation

11183000 SAN RAMON C AT WALNUT CREEK CA

Contra Costa County, California

Hydrologic Unit Code 18050001

Latitude 37°53'04", Longitude 122°03'00" NAD27

Drainage area 50.8 square miles

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

Page Contact Information: California Water Data Support Team
Page Last Modified: 2025-09-20 19:40:52 EDT
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