Skip to main content
U.S. flag

An official website of the United States government

Where can I get real-time and historical streamflow information?

The best starting point for USGS streamflow data is the interactive National Water Information System (NWIS): Mapper website.

Zoom in to your area of interest or use the search options in the left navigation window. The map displays active surface-water sites by default, but you can change the type of water site (surface-water, groundwater, springs, atmospheric) in the left menu.

The USGS Water Data and Tools website is another good starting point.

If you are unable to find the information that you need, contact the USGS Water Science Center for that state.

Learn more: Tutorials for using the National Water Information System

Related Content