Greenhouse Gas Standards and Guidelines for Fossil Fuel-Fired Power Plants

On this page:

• Rule Summary
• Rule History
• Additional Resources

Rule Summary

On June 11, 2025, EPA Administrator Lee Zeldin proposed to repeal all “greenhouse gas” emissions standards for the power sector under Section 111 of the Clean Air Act. This proposal would ensure affordable and reliable energy supplies and drive down the costs of transportation, heating, utilities, farming, and manufacturing while boosting our national security. 

Rule History

06/11/2025 - Proposed Rule: Repeal of Greenhouse Gas Emissions Standards for Fossil Fuel-Fired Electric Generating Units

01/08/2025 - Notice of final action denying or partially denying petitions for reconsideration

04/25/2024 - Final Rule: NSPS for Greenhouse Gas (GHG) Emissions from New, Modified, and Reconstructed Fossil Fuel-Fired Electric Generating Units (EGUs); Emission Guidelines for GHG from Existing EGUs and Repeal of the Affordable Clean Energy Rule

11/20/2023 - Supplemental Notice of Proposed Rulemaking

06/16/2023 - Comment Period Extension 

05/23/2023 -  Proposed Rule:  New Source Performance Standards for Greenhouse Gas Emissions from New, Modified, and Reconstructed Fossil Fuel-Fired Electric Generating Units (EGUs); Emission Guidelines for Greenhouse Gas Emissions from Existing Fossil Fuel-Fired EGUs

Additional Resources

Supporting Information for Proposed Repeal

Fact Sheet: Proposed Repeal of Greenhouse Gas Emissions Standards for Fossil Fuel-Fired Electric Generating Units (pdf) (229.59 KB)

Regulatory Impact Analysis for the Proposed Repeal of Greenhouse Gas Emissions Standards for Fossil Fuel-Fired Electric Generating Units (pdf) (1.47 MB)

Regulatory Text: Primary Proposal (pdf) (101.3 KB)

Regulatory Text: Alternative Proposal (pdf) (417.37 KB)

See Supporting Information for Petitions for Reconsideration (January 2025)

See Supporting Information for the Final Carbon Pollution Standards (April 2024)