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EPA/OW RIN: 2040-AG23 Publication ID: Spring 2023 
Title: Supplemental Effluent Limitations Guidelines and Standards for the Steam Electric Power Generating Point Source Category  

On March 29, 2023, EPA published a proposed rule to potentially strengthen the Steam Electric Effluent Limitations Guidelines and Standards (ELGs) (40 CFR 423). EPA previously revised the Steam Electric ELGs in 2015 and 2020. The proposed  rule making would establish more stringent ELGs for wastestreams addressed in the 2020 Steam Electric Reconsideration Rule (flue gas desulfurization wastewater and bottom ash transport water). In addition, the proposal would establish more stringent effluent limitations and standards for an additional wastestream (combustion residual leachate) and takes comment on potential revisions to limitations and standards for a fourth wastestream (legacy wastewater). The first two wastestreams mentioned above are the subject of current litigation pending in the U.S. Court of Appeals for the Fourth Circuit. Appalachian Voices, et al. v. EPA, No. 20-2187 (4th Cir.). The 2015 limitations for combustion residual leachate and legacy wastewater discharged by existing sources were vacated by the U.S. Court of Appeals for the Fifth Circuit in Southwestern Electric Power Co., et al. v. EPA, 920 F.3d 999 (5th Cir. 2019).

Agency: Environmental Protection Agency(EPA)  Priority: Economically Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: Yes  Unfunded Mandates: Undetermined 
CFR Citation: 40 CFR 423   
Legal Authority: 33 U.S.C. 1361    33 U.S.C. 1318    33 U.S.C. 1317    33 U.S.C. 1316    33 U.S.C. 1311    33 U.S.C. 1314   
Legal Deadline:  None
Action Date FR Cite
Notice  08/03/2021  86 FR 41801   
NPRM  03/29/2023  88 FR 18824   
NPRM Comment Period End  05/30/2023 
Final Rule  04/00/2024 
Additional Information: EPA-HQ-OW-2009-0819.
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Federal, Local, State 
Federalism: Undetermined 
Included in the Regulatory Plan: No 
Sectors Affected: 221112 Fossil Fuel Electric Power Generation 
RIN Data Printed in the FR: No 
Related RINs: Split from 2040-AG28 
Agency Contact:
Jesse Pritts
Environmental Protection Agency
Office of Water
Mail Code 4303T, 1200 Pennsylvania Avenue NW,
Washington, DC 20460
Phone:202 566-1038