ATS River Pulse brings United States streamflow into the browser, live, through the modern USGS Water Data API. Pick any of the fifty states and every reporting stream gauge appears on a topographic basemap with its latest continuous discharge in cubic feet per second and its gage height in feet. Gauges are classified within the state by quantile buckets over the log-flow range, from dry gray through low cyan to high blue, so the wet and dry parts of a state read instantly. Select a gauge for its live readings, a seven-day hydrograph and a link to its official USGS station page. Readings refresh every five minutes.