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EPA/OW RIN: 2040-AG19 Publication ID: Spring 2022 
Title: Revised Definition of "Waters of the United States" 

In April 2020, the EPA and the Department of the Army (the agencies) published the Navigable Waters Protection Rule that revised the previously-codified definition of "Waters of the United States” (WOTUS). The agencies initiated a new rulemaking process, "Revised Definition of Waters of the United States,” to restore the regulations in place prior to the 2015 Clean Water Rule, updated to be consistent with relevant Supreme Court decisions in SWANCC (2001) and Rapanos (2006). The agencies also intend to consider further refinements in a second rule that would take into account additional stakeholder engagement and implementation considerations, scientific developments, and environmental justice values. This effort will also be informed by the experience of implementing the pre-2015 rule, the 2015 Clean Water Rule, and the 2020 Navigable Waters Protection Rule.

Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: Undetermined  Unfunded Mandates: Undetermined 
CFR Citation: 40 CFR 120.1   
Legal Authority: 33 U.S.C. 1251   
Legal Deadline:  None
Action Date FR Cite
Notice  08/04/2021  86 FR 41911   
Notice  10/25/2021  86 FR 58829   
Notice  11/08/2021  86 FR 61730   
NPRM  12/07/2021  86 FR 69372   
Final Rule  08/00/2022 
Additional Information: .
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal, Local, State, Tribal 
Federalism: Undetermined 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Damaris Christensen
Environmental Protection Agency
Office of Water
1200 Pennsylvania Avenue NW,
Washington, DC 20460
Phone:202 566-0371