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The USGS 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 Nation's water resources. Hydrologic data and other data are used in research and hydrologic studies to describe the quantity, quality, and location of the water resources of the United States. The collection, analysis, and interpretation of these data is done in cooperation with other Federal, state and local agencies, universities, and research centers.
U.S. Department of the Interior U.S. Geological Survey
Last Modification: Monday, April 22, 2002
U.S. Geological Survey Policy and Disclaimers