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USGS WATER SERVICES

This site provides USGS water data in machine-readable formats via REST APIs, a
common framework programs use to search and download data. The services below
each provide a different type of data, ranging from instantaneous measurements
of streamflow to information about individual USGS sites and more. The links
below lead to documentation for how to use each service, and web forms to build
queries for each endpoint.


 * INSTANTANEOUS VALUES SERVICE
   
   Retrieve current streamflow, gage height, and hundreds of other real-time
   data for one or multiple locations.
   
    * Learn More
    * Test the Service


 * STATISTICS SERVICE
   
   Retrieve daily, monthly or annual statistics for sites. Statistics are
   provided on approved data only for time-series sites. Statistics are
   available for any parameter on these sites with approved data.
   
    * Learn More
    * Test the Service


 * GROUNDWATER LEVELS SERVICE
   
   Retrieve historical manually-recorded groundwater levels from hydrologic
   sites served by the USGS. (If you are looking to retrieve data for real-time
   or historical groundwater levels recorded on a regular basis using automated
   equipment, please use the instantaneous values web service.)
   
    * Learn More
    * Test the Service


 * SITE SERVICE
   
   The service allows searches for USGS sites and site information using a
   variety of flexible filters. Output formats include tab-delimited and KML
   formats (used with Google Earth and Google Maps).
   
    * Learn More
    * Test the Service


 * DAILY VALUES SERVICE
   
   Interested in historical summarized daily data about our nation's streams,
   lakes and wells? This service provides a wealth of historical water data.
   Daily data available for USGS water sites include mean, median, maximum,
   minimum, and/or other derived values.
   
    * Learn More
    * Test the Service


 * WATER QUALITY SERVICES
   
   The USGS and the U.S. Environmental Protection Agency (EPA) each collect vast
   amounts of water quality data. A jointly developed web service allows you to
   retrieve data for millions of quality checked water quality samples and
   results.
   
   Learn More

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