Association of Clean Water Administrators
EPARulemakingEPA-HQ-OW-2025-0322

Updated Definition of Waters of the United States

RIN
2040-AG44
Last modified
Jun 30, 2026
Comment window
closed 204d ago
Association of Clean Water Administrators filings
2

Activity

Association of Clean Water Administrators filed 2 comments on this docket between Dec 1, 2025 and Jan 8, 2026. 271 other organizations filed here. The comment window closed 204d ago.

What Association of Clean Water Administrators filed (2)

Jan 8, 2026· Comment submitted by Association of Clean Water Administrators (ACWA)· EPA-HQ-OW-2025-0322-0666

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

Dec 1, 2025· Comment submitted by Association of Clean Water Administrators (ACWA)· EPA-HQ-OW-2025-0322-0152

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) — Association of Clean Water Administrators | OpenPolis