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EPA/OW RIN: 2040-AG44 Publication ID: Spring 2025 
Title: ●Final Clarifying Definition of "Waters of the United States" 
Abstract:

The U.S. Environmental Protection Agency and the U.S. Department of the Army are undertaking a rulemaking to revise key topics of the waters of the United States” definition in light of the Supreme Court’s decision in Sackett v. Environmental Protection Agency, 598 U.S. 651 (2023), including continuous surface connection,” relatively permanent,” and jurisdictional versus non-jurisdictional ditches. These revisions focus on clarity, simplicity and improvements that will stand the test of time.

 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Undetermined  Unfunded Mandates: Undetermined 
EO 14192 Designation: Deregulatory 
CFR Citation: 40 CFR 120.2   
Legal Authority: 33 U.S.C. 1251 et seq.   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  08/00/2025 
Final Action  01/00/2026 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal, Local, State, Tribal 
Small Entities Affected: No  Federalism: Undetermined 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Related RINs: Related to 2040-AG32 
Agency Contact:
Rose Kwok
Environmental Protection Agency
Office of Water
1200 Pennsylvania Avenue NW, Mail Code 4504T,
Washington, DC 20460
Phone:202 566-0657
Email: kwok.rose@epa.gov