Understanding US Water Flows

Streamer is a new way to visualize and understand water flow across America. With Streamer you can explore America's major streams by tracing upstream to their source or downstream to where they empty.

You can also see a Stream Trace Report. The report provides information about the water bodies, streams, and streamflow measuring stations along the routes that you trace using the Streamer map. It also identifies places (states, counties, cities) your trace encounters as it moves downstream or upstream.