News & Analysis as of

Comment Period Hazardous Substances 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

Robinson+Cole Environmental Law +

Back From the Grave? “Once In, Always In” for Hazardous Air Pollutant Emissions

In the Byzantine complexity of the Clean Air Act (CAA), EPA’s “once in, always in” policy regarding hazardous air pollutants (HAP) has been particularly confounding.  And now it’s back in play, through regulatory revisions...more

Clark Hill PLC

EPA’s Position That HAP Listing of 1-Bromopropane Will Trigger Immediate Major Source Obligations Likely To Be Challenged as...

Clark Hill PLC on

On Jan. 5, the U.S. Environmental Protection Agency (“EPA”) published a Final Rule in the Federal Register adding 1-bromopropane (“1-BP”) to the list of hazardous air pollutants (“HAPs”) under Section 112 of the Clean Air Act...more

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