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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
American Association of State Highway and Transportation Officials filings
2

Activity

American Association of State Highway and Transportation Officials filed 2 comments on this docket between Jan 6, 2026 and Oct 15, 2026. 370 other organizations filed here. The comment window closed 27d ago.

What American Association of State Highway and Transportation Officials filed (2)

Oct 15, 2026· Comment submitted by American Association of State Highway and Transportation Officials (AASHTO)· EPA-HQ-OW-2025-0322-15985

Filed on regulations.gov — full text not in the inline record.

Jan 6, 2026· Comment submitted by American Association of State Highway and Transportation Officials (AASHTO)· EPA-HQ-OW-2025-0322-0469

Filed on regulations.gov — full text not in the inline record.

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

View on regulations.gov →
Updated Definition of Waters of the United States (EPA) — American Association of State Highway and Transportation Officials | OpenPolis