USGS Watershed Boundary Dataset HUC12 Units

<p><b><i>This data resource is a layer in a map service. To download it, please go to the &quot;Layers&quot; section of this page and click the name of the dataset. This will open a new page that features a download button.</i></b></p>
<p><b>Open the Map Service:</b> <a href='https://gis.chesapeakebay.net/ags/rest/services/Boundaries/WBD_HUC_12/MapServer' rel='nofollow ugc'>https://gis.chesapeakebay.net/ags/rest/services/Boundaries/WBD_HUC_12/MapServer</a></p>
<p>This layer of HUC12 units is from the U.S. Geological Survey (USGS) <a href='https://www.usgs.gov/core-science-systems/ngp/national-hydrography/watershed-boundary-dataset' rel='nofollow ugc'>Watershed Boundary Dataset</a> V2, and has been clipped to the Chesapeake Bay watershed. The attributes of HUC4, HUC6, HUC8 and HUC10 units that overlap with the HUC12 units are assigned to each HUC12 unit.</p>