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#1 Federal
Watershed Boundary Dataset; 12-Digit Watersheds Dissolved to 8-Digit Watersheds
- Organization: Department of the Interior
- Dataset Last Updated: November 17, 2020 at 12:00 AM
This dataset is the digital hydrologic unit boundary layer for the 8-digit subwatershed boundaries for the conterminous United States. This dataset is intended to be used with the following two...
- XML
- XML
Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: September 10, 2026 at 08:00 PM
#2 Federal
EnviroAtlas - HU12_polygon
- Organization: U.S. Environmental Protection Agency
- Dataset Last Updated: January 01, 2012 at 12:00 AM
This data set is a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the entire United States. This data set consists of geo-referenced digital data and...
- HTML
- HTML
- HTML
- HTML
Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: August 03, 2026 at 04:39 AM

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