The USGS Watershed Boundary Dataset (WBD) is the official seamless watershed dataset for the United States. ArcGIS Living Atlas now includes six new WBD layers containing the most up-to-date information for HUC levels 2 through 12 at a 1:24,000 scale (1:63,000 in Alaska) and design revisions that improve both mapping versatility and understanding of hydrology.

For more information, see A watershed moment.
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