Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
USGS streamgage at Alcatraz Island, California
San Francisco Bay a NE Shore Alcatraz Island CA - 374938122251801 https://waterdata.usgs.gov/monitoring-location/374938122251801/
Public Domain.
