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USGS Water Data for the Nation Help

An overview of this help system.

This help system is designed to assist you in rapidly finding relevant information about the USGS Water Data for the Nation web site (

If in a hurry, simply enter the search term in the search box and a list of related topics will be shown. You can also view frequently asked questions or if you want to learn how to do common tasks follow one of our tutorials. A list of defined USGS search criteria and codes and parameters is also available. You can also learn to navigate the web site and learn about output formats.

If you cannot find the information that you are looking for here, please contact us. Except for weekends or holidays, we can usually respond to questions within one business day.