NHD State Product Step 7 Part 2: Run the Delete Identical tool

NHD State Product Step 7 Part 2: Run the Delete Identical tool on the NHD feature classes: NHDFlowline, NHDWaterbody, NHDArea, NHDLine, and NHDPoint using the Permanent_Identifier field to find identical records for deletion. Utilize the batch processing feature in the tool to run it on multiple feature classes at a time.

From: Create Your Own NHD State Product | U.S. Geological Survey (usgs.gov)