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EPA/OW RIN: 2040-AF81 Publication ID: Spring 2020 
Title: Peak Flows Management 

Wet weather events (e.g., rain, snowmelt) can affect operations at publicly owned treatment works (POTWs) when excess water enters the wastewater collection system. Large wet weather events can exceed the POTW's capacity to provide the same type of treatment for all of the incoming wastewater. This update to the regulations will seek to clarify permitting procedures under 40 CFR part 122 to provide POTWs with separate sanitary sewer systems flexibility in how they manage and treat peak flows under wet weather conditions. These updates will also seek to ensure a consistent national approach for permitting POTWs that allows efficient treatment plant operation while protecting the public from potential adverse health effects of inadequately treated wastewater.

Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
EO 13771 Designation: Deregulatory 
CFR Citation: 40 CFR 122   
Legal Authority: 33 U.S.C. 1311    33 U.S.C. 1314   
Legal Deadline:  None
Action Date FR Cite
NPRM  07/00/2020 
Final Rule  12/00/2020 
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Local, State, Tribal 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Lisa Biddle
Environmental Protection Agency
Office of Water
4303T, 1200 Pennsylvania Avenue NW,
Washington, DC 20460
Phone:202 566-0350
Fax:202 566-1053

Jamie Piziali
Environmental Protection Agency
Office of Water
1200 Pennsylvania Avenue NW,
Washington, DC 20460
Phone:202 564-1438