USGS Station 01578310 • Lat 39.6601°, Long -76.1722° • Elevation Pennsylvania Basin
Flow is within the historical middle range (10th–75th percentile). Actual navigability depends entirely on the specific river section and your craft.
Flow is in the historical middle range. Wading conditions and water clarity depend on recent local weather and upstream releases.
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 • 70.4476256874557 mi away
