Air Quality

January 6, 2023

EPA Proposes Significant Change to Particulate Matter Air Quality Standards

On January 6, 2023, EPA announced that is was issuing a proposed rule to lower the National Ambient Air Quality Standards (“NAAQS”) for fine particulate matter (“PM2.5”), also referred to as soot. Continue reading

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August 22, 2017

EPA Withdraws Delay on Ozone NAAQS Designations

On August 1, 2017, 15 states and Washington D.C. filed a petition in the D.C. Circuit Court challenging EPA’s one-year delay of the ozone NAAQS deadline. Then, on August 2, 2017, EPA changed course and withdrew the extension. Continue reading

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June 7, 2017

EPA Extends Deadline for 2015 Ozone Air Quality Area Designations

On June 6, 2017, EPA Administrator Scott Pruitt sent a letter to the nation’s governors, informing them that EPA is extending the deadline for promulgating initial area designations, by one year, for the 2015 ozone National Ambient Air Quality Standards (“NAAQS”). Continue reading

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April 12, 2017

Litigation in D.C. Circuit Court Put on Hold While EPA Reconsiders 2015 Ozone Air Quality Standards

On Tuesday, April 11th, the U.S. Court of Appeals for the D.C. Circuit granted EPA’s motion to continue oral argument and indefinitely delay any decision on challenges to the agency’s 2015 National Ambient Air Quality Standards (NAAQS) for ozone in the case of Murray Energy Corp. v. EPA, Case No. 15-1385. Continue reading

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Air Quality

EPA Proposes Significant Change to Particulate Matter Air Quality Standards

EPA Withdraws Delay on Ozone NAAQS Designations

EPA Extends Deadline for 2015 Ozone Air Quality Area Designations

Litigation in D.C. Circuit Court Put on Hold While EPA Reconsiders 2015 Ozone Air Quality Standards