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EPA/OW RIN: 2040-AF81 Publication ID: Fall 2018 
Title: Peak Flows Management 
Abstract:

Wet weather events (e.g., rain, snowmelt) can affect publicly owned treatment works (POTWs) operations when excess water enters the wastewater collection system. The increased wet weather flows can exceed the POTW treatment plant's capacity to provide the same type of treatment for all of the incoming wastewater. The treatment plant's secondary treatment units are the most likely to be adversely affected by wet weather because the biological systems can be damaged when too much water flows through them. POTWs employ a variety of operational practices to ensure the integrity of their secondary treatment units during wet weather. This update to the regulations will seek to clarify permitting procedures so as 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

Statement of Need:

This update to the regulations will seek to clarify permitting procedures for POTW treatment plants with separate storm sewer systems under wet weather operational conditions. These updates will also seek to ensure a consistent national approach for permitting POTWs that provides for efficient treatment plant operation while protecting the public from potential adverse health effects of inadequately treated wastewater.

Summary of the Legal Basis:

The rule will be proposed under the Clean Water Act, 33 U.S.C. 1311 and 33 U.S.C. 1314.

Alternatives:

Alternatives have not yet been developed at this time.

Anticipated Costs and Benefits:

A cost analysis analyzing anticipated costs and benefits will be developed for the rulemaking at the time of proposal.

Risks:

The agencies will be able to analyze the risks of the proposed rulemaking once policy decisions have been made.

Timetable:
Action Date FR Cite
NPRM  07/00/2019 
Final Rule  07/00/2020 
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Local, State, Tribal 
Federalism: No 
Included in the Regulatory Plan: Yes 
RIN Data Printed in the FR: No 
Agency Contact:
Jamie Piziali
Environmental Protection Agency
Office of Water
1200 Pennsylvania Avenue, NW,
Washington, DC 20460
Phone:202 564-1438
Email: piziali.jamie@epa.gov

Lisa Biddle
Environmental Protection Agency
Office of Water
4303T, 1200 Pennsylvania Avenue, NW,
Washington, DC 20460
Phone:202 566-0350
Fax:202 566-1053
Email: biddle.lisa@epa.gov