About RiverTracker

RiverTracker provides real-time flow data for 999 US rivers and stream gauges across 50 states, powered by the USGS Water Services API. It covers major rivers such as the Mississippi, Missouri, Colorado and Columbia alongside hundreds of smaller gauged rivers and creeks.

Each river page shows the current discharge in cubic feet per second, gauge height, the 30-day minimum, maximum and average flow, a 30-day trend line and the gauge location. Browse by state, view every gauge on the map, or compare rivers on the flow rankings page.

Data Sources

• USGS NWIS Instantaneous Values — real-time flow and gauge height
• USGS NWIS Daily Values — 30-day flow statistics

Features

• Real-time flow data for 999 river gauges
• Interactive map with color-coded markers
• 30-day flow trend sparklines
• Flow rankings across all tracked rivers
• State-by-state river listings
• Flood status indicators
• Flow unit converter tool