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  • #1 Federal

    Hydrogeologic regions of the conterminous United States

    This data release contains shapefiles of hydrogeologic regions of the conterminous United States. The United States Geological Survey (USGS) is developing a National Extent Hydrogeologic...

    Search relevance: 1.00 | Views last month: 0 | Catalog Last Checked: August 01, 2026 at 04:29 AM

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