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EPA/OW RIN: 2040-AG30 Publication ID: Spring 2023 
Title: ●Water Quality Standards to Protect Aquatic Life in the Delaware River  

On December 1, 2022, EPA issued an Administrator’s Determination that revised water quality standards (WQS) in certain zones of the Delaware River are necessary to meet the requirements of the CWA. Specifically, EPA determined that a propagation designated use and protective dissolved oxygen criteria are required to protect sensitive aquatic life – including two federally listed species under the Endangered Species Act – in zones 3, 4, and upper-5 of the Delaware River. EPA is now fulfilling its statutory obligation to promulgate the necessary WQS.

Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Undetermined  Unfunded Mandates: No 
CFR Citation: Undetermined     (To search for a specific CFR, visit the Code of Federal Regulations.)
Legal Authority: 33 U.S.C. 1251 et seq Clean Water Act   
Legal Deadline:  None
Action Date FR Cite
NPRM  12/00/2023 
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: State 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Hannah Lesch
Environmental Protection Agency
Office of Water
1200 Pennsylvania Avenue NW,
Washington, DC 20460
Phone:202 566-1224

Erica Fleisig
Environmental Protection Agency
Office of Water
4305T, 1200 Pennsylvania Avenue NW,
Washington, DC 20460
Phone:202 566-1057