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The U.S. Geological Survey (USGS), an agency of the U.S. Department of the Interior, is the Nation's largest earth-science agency, and has the principal responsibility within the Federal government for providing hydrologic information and for appraising the quantity and quality of our Nation's water resources. The USGS is also the primary agency for geologic and biologic research and mapping of the Nation and its resources. | |||||||||||||
The use of brand names or links to private web sites in this web page or subpages are for identification or informational purposes only and do not constitute endorsement by the U.S. Geological Survey. |