USGS Water Data

Access real-time and historical water data from the U.S. Geological Survey covering thousands of monitoring stations across the United States. Data includes instantaneous streamflow and gage height readings, daily statistical summaries (mean, median, max, min) for streams, lakes, and wells, and historically recorded groundwater level measurements. This public-domain dataset supports hydrology research, flood forecasting, drought monitoring, water resource management, and environmental analysis.

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USGS Water Data

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What you can query

You can check the latest real-time streamflow and gage height at any monitoring station (latest-continuous endpoint), pull daily mean, max, or min summaries over any date range (daily endpoint), search for monitoring locations by state, site type, or bounding box (monitoring-locations endpoint), discover what parameters are measured at a specific site (time-series-metadata endpoint), and navigate upstream or downstream along the river network (NLDI).

What you can do

  • Monitor real-time river streamflow and gage height at USGS stations
  • Analyze historical daily water level trends for lakes, rivers, and wells
  • Track groundwater levels over time for aquifer management
  • Assess water quality measurements across sampling sites
  • Support flood forecasting and drought monitoring with continuous sensor data
  • Research watershed hydrology and environmental conditions

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