USGS Surface Water for USA: Streamflow Measurements

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Streamflow Measurements for the Nation

Streamflow measurement pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline and new pages.

Available data for this site

San Diego County, California

Hydrologic Unit Code 18070303

Latitude 33°15'49", Longitude 116°57'14" NAD83

Drainage area 261 square miles

Gage datum 860 feet above NGVD29

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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: 2026-01-11 03:00:43 EST
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