On November 17, 2025, the United States Environmental Protection Agency (EPA) published a proposed rule that would significantly narrow its regulatory authority over Waters of the United States (WOTUS). Under the new proposed WOTUS rule, EPA would effectively have jurisdiction only over relatively permanent waters and a smaller subset of directly connected wetlands.

The WOTUS definition outlines the geographic reach of the U.S. Army Corps of Engineers’ and EPA’s authority under the 1972 Clean Water Act to regulate streams, wetlands, and other water bodies. As such, it has been reviewed in boardrooms, courtrooms, and government offices for over fifty years. Most recently, on May 25, 2023, the U.S. Supreme Court issued its opinion in Sackett v. EPA. In Sackett, the Supreme Court determined that WOTUS are only (1) relatively permanent bodies of water, such as oceans, lakes, rivers, and streams; or (2) adjacent wetlands indistinguishable from those waters because of a continuous surface connection.

Reprinted courtesy of Patrick J. Paul, Snell & Wilmer, Chris P. Colyer, Snell & Wilmer and John Habib, Snell & Wilmer

Mr. Paul may be contacted at ppaul@swlaw.com
Mr. Colyer may be contacted at ccolyer@swlaw.com
Mr. Habib may be contacted at jhabib@swlaw.com