Regional Interactive Maps
- North Branch
- Upper Potomac
- Potomac Piedmont
- Georgetown to Great Falls
- Mall Area
- Mount Vernon to the Mall
- Potomac Estuary
- Lower Potomac
Search Potomac Sites
Potomac River at Hancock MD
USGS Streamflow Monitor
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.
For real-time data on this site, select this link.
Photo courtesy U.S. Geological Survey
Nearby Potomac River Stream Monitors
To view a map of Potomac River Monitors, select this link.