For information regarding the definition of Waters of the United States, to include the Environmental Protection Agency and the Department of the Army’s “Revised Definition of ‘Waters of the United States’” (2023 Rule) and the Supreme Court Ruling in Sackett v. Environmental Protection Agency, please go to the Corps Headquarters website at

Regulatory Program Notices

Below are regulatory announcements, in chronological order, which are both current and historical. Current announcements provide information regarding ongoing regulatory processes and happenings. Historical announcements remain posted, as long as they remain up-to-date and applicable, to provide the public with a transparent record of changes and improvements to our program.   Regulatory image of trees over a creek