EPA and Army Corps Propose to Narrow Federal Jurisdiction Under the Clean Water Act
On Monday, November 17, 2025, the U.S. Environmental Protection Agency (EPA) and U.S. Army Corps of Engineers (Corps) (collectively, the “Agencies”) released a pre-publication proposed rule to revise the definition of “Waters of the United States” (WOTUS) under the Clean Water Act (CWA). The proposal responds to the U.S. Supreme Court’s 2023 decision in Sackett v. EPA, 598 U.S. 651 (2023), but goes further than the Biden Administration’s response to the Sackett ruling in August 2023 (the “Conforming Rule”).[1] Sidley’s blog post on the prior administration’s rule can be found here.
Agencies Collectively Move to Overhaul Environmental Review Regulations
On July 3, 2025, numerous federal agencies initiated an effort to revise the manner in which they comply with the National Environmental Policy Act (NEPA). NEPA, a cornerstone of environmental governance and project development in the U.S., has historically been implemented through regulations from the Council on Environmental Quality (CEQ). The DC Circuit questioned the legality of those regulations, as well as CEQ’s authority to implement them. And at the direction of President Trump’s February 25, 2025 Executive Order 14154 — “Unleashing American Energy” — CEQ rescinded its NEPA implementing regulations. In place, CEQ provided guidance for agencies that instructed them to update their NEPA procedures by February 2026 in a manner consistent with recent statutory amendments that prioritizes “efficiency and certainty over any other policy objectives.” Today, we are getting our first glimpse into what that process will look like.
