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EPARulemakingEPA-HQ-OW-2025-0322

Updated Definition of Waters of the United States

RIN
2040-AG44
Last modified
Oct 23, 2026
Comment window
closed 27d ago
Association of American Railroads filings
1

Activity

Association of American Railroads filed 1 comment on this docket between Oct 13, 2026 and Oct 13, 2026. 370 other organizations filed here. The comment window closed 27d ago.

What Association of American Railroads filed (1)

Oct 13, 2026· Comment submitted by Association of American Railroads (AAR)· EPA-HQ-OW-2025-0322-15655

Attached please find the comments of the Association of American Railroads, on behalf of itself and its members.

Abstract

The U.S. Environmental Protection Agency and the U.S. Department of the Army are undertaking a rulemaking to revise the regulations defining the scope of waters federally covered under the Clean Water Act in light of the Supreme Court’s decision in Sackett v. Environmental Protection Agency, 598 U.S. 651 (2023). With this proposed rule, the agencies intend to provide greater regulatory certainty and increase Clean Water Act program predictability and consistency by clarifying the definition of “waters of the United States.” Related Dockets: EPA-HQ-OW-2025-0093; EPA-HQ-OW-2021-0602; EPA-HQ-OW-2023-0346

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