Federal and state agencies maintain river level monitors throughout the Potomac River Basin. The U.S.Geological Survey compiles real-time information from river monitors, in cooperation with the U.S. Army Corps of Engineers.
Current stream conditions are shown in the graph below:
The National Oceanic and Atmospheric Administration (NOAA) has an on-line river forecast service summarized below. Click on the Web link at right or below for detailed USGS data for this site.