News & Analysis as of

Comment Period National Emissions Standards Clean Air Act

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

Jenner & Block

New EPA Rule Removes Emergency Defense Waiver in Title V Air Permits

Jenner & Block on

On July 21, 2023, the Environmental Protection Agency published a final rule eliminating an affirmative defense for Clean Air Act permit emissions violations caused by “emergency” circumstances. “Major sources” (i.e....more

Hogan Lovells

EPA’s proposes most stringent vehicle emission standards ever for model years 2027-2032

Hogan Lovells on

On April 12, 2023, the Environmental Protection Agency (EPA) issued the notice of proposed rulemaking for “Multi-Pollutant Emission Standards for Model Years 2027 and Later Light-Duty and Medium-Duty Vehicles” (the “proposed...more

Ballard Spahr LLP

EPA Solicits Comments on Next Steps Toward Designating Regions Needing Stricter Controls of Sulfur Dioxide Air Emissions

Ballard Spahr LLP on

The U.S. Environmental Protection Agency (EPA) is requesting comment by March 31, 2016, on its intention to designate previously uncharacterized areas of the country with particularly large sources of sulfur dioxide (SO2)...more

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