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Digital data set describing ground-water regions in the conterminous US

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: October 16, 2026 at 06:42 AM | Dataset Last Updated: November 17, 2020 at 12:00 AM
This data set describes ground-water regions in the United States defined by the U.S. Geological Survey. These ground-water regions are useful for dividing the United States into areas of roughly similar hydrologic characterstics and water-use patterns. These regions are very generalized and were developed from a illustration published at a scale of approximately 1:20 million.

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