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Final Rules National Ambient Air Quality Standards Air Pollution

Holland & Knight LLP

Clean Air Act Rulemakings Don't Follow the Normal Rules – Just Ask the Supreme Court

Holland & Knight LLP on

Every law student learns that the Administrative Procedure Act (APA) outlines the default rules for how federal agencies propose and finalize regulations and how courts review them. But for many significant actions under the...more

Jenner & Block

EPA Lowers the PM2.5 NAAQS

Jenner & Block on

On March 6, 2024, EPA published its final rule lowering the primary annual National Ambient Air Quality Standards (“NAAQS”) for fine particulate matter (“PM2.5”) to 9.0 micrograms per cubic meter (“µg/m3”). The new, more...more

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

Particulate Matter/Revised National Ambient Air Quality Standard: 24 State Attorneys General (including Arkansas) Challenge U.S....

Twenty-four State Attorneys General filed a Petition for Review (“Petition for Review”) in the United States Court of Appeals for the District of Columbia Circuit challenging a United States Environmental Protection Agency...more

Robinson+Cole Environmental Law +

EPA Lowers the Fine Particulate NAAQS: A Closer Look at Implementation and Potential Impacts

On February 7, 2024, the U.S. Environmental Protection Agency (EPA) released its Final Rule lowering the primary annual National Ambient Air Quality Standard (NAAQS) for fine particulate matter (PM 2.5) from the current level...more

Troutman Pepper Locke

Air and Climate Report: January 2024

Troutman Pepper Locke on

PM NAAQS: Already behind schedule is perhaps the mostly widely impactful rule change EPA has proposed in many years: a lowering of the national ambient air quality standard (NAAQS) for fine particulate matter (PM2.5). EPA has...more

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

Ozone/Clean Air Act: U.S. Environmental Protection Agency Final Rule Retaining Current National Ambient Air Quality Standard

The United States Environmental Protection Agency (“EPA”) issued a final rule retaining the current National Ambient Air Quality Standard (“NAAQS”). This leaves in place the ozone NAAQS that was promulgated during the...more

Katten Muchin Rosenman LLP

EPA Issues Final Guidance for States for Consideration of PM2.5 Precursors

On May 30, 2019, the U.S. Environmental Protection Agency (EPA) issued a final memorandum on fine particulate matter (PM2.5) precursor demonstration guidance. Memorandum from Scott Mathias, Acting Director, EPA Air Quality...more

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

Arkansas State Implementation Plan Revisions Approval: August 8th U.S. Environmental Protection Agency Federal Register Notice...

The United States Environmental Protection Agency (“EPA”) published an August 8th Federal Register notice containing a direct final rule that approves revisions to the Arkansas State Implementation Plan (“SIP”). See 83 Fed....more

Snell & Wilmer

Seven Months into the Trump Administration, Outlook of Controversial Obama-Era Ozone Standard Remains Hazy

Snell & Wilmer on

The status of a controversial rule establishing more stringent ambient air quality standards for ozone—promulgated by former President Barack Obama’s Environmental Protection Agency (EPA)—remains unclear following a series of...more

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