Special Features

The maps and graphs in this summary describe national streamflow conditions for water year 2021 (October 1, 2020, to September 30, 2021) in the context of streamflow ranks relative to the 92-year period of water years 1930–2021.

Create a USGS flow duration curve dynamically. Choose USGS streamgage and specify the beginning and ending dates to create a curve

Present a time-history streamflow along with backdrop of monthly-flow percentiles.

View all streamflow condition maps in a seamless way. Provide tools for quick zooming, panning, and full screen. Search USGS streamgages easily by state, huc, and site name and number.

Collection of WaterWatch popular streamflow analysis tools for a streamgage.

Collection of WaterWatch streamflow analysis tools for a state.

Data services for all WaterWatch streamflow data and flow statistics

Download WatrWatch streamflow condition maps in shapefiles.

Download WatrWatch map data in various formats such as XML and KML.