USGS Station 01492500 • Lat 38.9857°, Long -75.8113° • Elevation Maryland Basin
Flow is in the bottom decile (below 10th percentile). Expect shallow sections, exposed rocks, and slower current.
Flow is in the lowest historical decile. Expect skinny-water presentations and higher wading pressure on fish.
Conditions change quickly. Always verify locally and use your own judgment before entering any body of water. This data is informational only and provided as-is.
Pins show this gauge (highlighted) and up to 5 nearby USGS stations. Tap any pin or use the list to check conditions upstream or downstream.
National Water Information System (NWIS) • Automated satellite telemetry transmission every 15 to 60 minutes.
Live readings via USGS satellite telemetry, updated every 15–60 minutes. Low / Normal / High verdicts are based on the 10th and 75th percentile discharge thresholds from the USGS Daily Statistics Service (decades of approved daily-mean data). Flood Risk uses the NWS published flood stage where available. Full methodology →
River Safety & Autonomous Human Verification Notice
River conditions can change abruptly due to upstream reservoir releases, sudden mountain thunderstorms, flash flooding, and seasonal snowmelt surges. Always scout rapids prior to commitment, wear an approved USCG Type III/V Personal Flotation Device (PFD), carry appropriate rescue gear, and check local emergency management bulletins before launching.
Potomac River near Washington, DC
USGS Station 01646500 • 70.2080793086368 mi away
