RiverTracker provides real-time flow data for 20 major US rivers, powered by the USGS Water Services API.

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 20 major rivers
• 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