USGS Water

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About the USGS Water Programs


The National Water Information System (NWIS) is the Nation's principal repository of water resources data. It includes data from more than 1.5 million sites, some in operation for more than 100 years.

Access the Data

The main wiki page for the USGS

US Geological Survey

Contents of the Data

Water Now

  • Real-time streamflow
  • Real-time flood data
  • Real-time drought data
  • Real-time ground-water levels
  • Recent ground-water levels
  • Ground-water response to climate
  • Real-time surface water quality
  • Recreation

Water Then

Water Tomorrow

  • Forecasts
  • Statistics
    • Streamflow statistics at USGS gages
    • Estimate streamflow statistics anywhere