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Air Pollution Proposed Rules Hazardous Substances

Jones Day

EPA Proposes Repeal of 2024 Mercury and Air Toxics Standards Amendments

Jones Day on

On June 11, 2025, the U.S. Environmental Protection Agency ("EPA") announced a proposed rule to repeal key amendments to the 2024 Mercury and Air Toxics Standards ("MATS") for coal- and oil-fired electric utility steam...more

Vinson & Elkins LLP

EPA Proposes to Repeal Biden-era Regulations Governing Air Toxic Emissions from Coal- and Oil-Fired Power Plants

Vinson & Elkins LLP on

On June 17, 2025, the U.S. Environmental Protection Agency (“EPA”) published a proposed rule to repeal the amendments to the Mercury and Air Toxics Standards (“MATS”) adopted by the Biden administration in 2024. These...more

Mitchell, Williams, Selig, Gates & Woodyard,...

New Source Performance Standards/National Emission Standards for Hazardous Air Pollutants: U.S. Environmental Protection Agency...

The United States Environmental Protection Agency (“EPA”) issued a pre-publication version of a proposed rule that would remove affirmative defense provisions from certain Clean Air Act New Source Performance Standards...more

Mitchell, Williams, Selig, Gates & Woodyard,...

Hazardous Air Pollutants/Clean Air Act: U.S. Environmental Protection Agency Proposed Rule Addressing Issues Associated with...

The United States Environmental Protection Agency (“EPA”) published in the September 13th Federal Register a proposed rule that would amend the general provisions for Clean Air Act National Emission Standards for Hazardous...more

Mitchell, Williams, Selig, Gates & Woodyard,...

NESHAP/Bulk Gasoline Terminals: NESCAUM Comments on Proposed Technology Review/Standards of Performance

The Northeast States for Coordinated Air Use Management (“NESCAUM”) submitted August 9th comments to the United States Environmental Protection Agency (“EPA”) addressing: National Emission Standards for Hazardous Air...more

Williams Mullen

Political Ping Pong? What’s Going On With the Utility Sector’s Clean Air Act Mercury and Air Toxics Standards?

Williams Mullen on

EPA recently issued a proposed rule (“the Proposed Rule”) regarding the Mercury and Air Toxics Standards (MATS), which regulate hazardous air pollutant (HAP) emissions from coal and gas-fired electric generating units (EGUs)...more

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