News & Analysis as of

Clean Air Act Air Quality Standards National Ambient Air Quality Standards

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

Arkansas Ambient Air Monitoring Network: Annual Network Plan for 2024-2025

The Arkansas Department of Energy and Environment – Division of Environmental Quality (“DEQ”) submitted on July 1st to the United States Environmental Protection Agency (“EPA”) a document titled: Arkansas Ambient Air...more

Saul Ewing LLP

Supreme Court Temporarily Halts EPA’s “Good Neighbor” Air Pollution Rule

Saul Ewing LLP on

The Clean Air Act (“CAA”) envisions states and the federal government working together to improve air quality. Under the CAA, states must develop State Implementation Plans (“SIPs”) to implement National Ambient Air Quality...more

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

Air Quality Standards Implementation Act of 2024: U.S. House of Representatives Passes Legislation Addressing NAAQS Development...

The United States House of Representatives passed by partisan vote legislation denominated H.R. 7650 that would amend the Clean Air Act titled: “Air Quality Standards Implementation Act of 2024” (“Act”). The Act...more

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

Start Up/Shut Down/Malfunction/Clean Air Act: U.S. Court of Appeals for the D.C. Circuit Addresses U.S. Environmental Protection...

The United States Court of Appeals for the D.C. Circuit (“Court”) addressed in a March 1st Opinion an issue addressing start up, shut down and malfunction (“SSM”) provisions. See Environmental Committee of the Florida...more

Jenner & Block

EPA Lowers the PM2.5 NAAQS

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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

Quarles & Brady LLP

Industry not Breathing Easier Following Issuance of New Air Quality Standards for Fine Particulate Matter

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On March 6, 2024, the United States Environmental Protection Agency (EPA) published in the Federal Register its long-awaited reconsideration of the National Ambient Air Quality Standard (NAAQS) for particulate matter (PM). In...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

Troutman Pepper

EPA Lowers Annual PM2.5 NAAQS, With Immediate Impacts for Air Permitting

Troutman Pepper on

Exercising one of its most important and far-reaching powers under the Clean Air Act, the Environmental Protection Agency (EPA) has lowered the primary annual National Ambient Air Quality Standard (NAAQS) for fine particulate...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

Ballard Spahr LLP

EPA Proposes to Extend Air Transport Rule to Five More States

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The Environmental Protection Agency (EPA) intends to require power plants and other stationary sources in five additional states to comply with the Good Neighbor Plan to ensure that these states do not unlawfully contribute...more

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

Particulate Matter/Clean Air Act National Ambient Air Quality Standard: U.S. Environmental Protection Agency Final Rule Tightening...

The United States Environmental Protection Agency (“EPA”) announced today a final rule which will tighten the National Ambient Air Quality Standards (“NAAQS”) for fine particulate matter. EPA previously: - Stated on June 10,...more

Foley Hoag LLP - Environmental Law

EPA Lowers the PM2.5 NAAQS: Goldilocks Can Sleep Soundly

On February 7, 2024, EPA finalized a rule lowering the primary annual National Ambient Air Quality Standard for PM2.5 to 9.00 ug/m3.  This is a significant reduction from the current 12.00 ug/m3 standard and a victory for...more

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

EPA's Proposed Air Quality Standards Will Cause Permitting Gridlock Across Our Economy: U.S. Chamber of Commerce Report Addressing...

The United States Chamber of Commerce (“Chamber”) issued a November 2023 report titled: EPA’s Proposed Air Quality Standards Will Cause Permitting Gridlock Across Our Economy (“Report”)...more

Foley Hoag LLP - Environmental Law

Another Study Regarding the Health Impacts of PM Emissions From Power Plants: What Impact Will It Have On Regulation and...

An article in Science published last week indicates that the mortality risk from exposure to PM2.5 from coal-fired electric generating units is roughly twice as high as the risk posed by PM2.5 from other sources.  According...more

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

Particulate Matter/Clean Air Act NAAQS: 70 Trade Organizations' Letter to the White House Requesting Retention of Current Standard

Seventy trade groups sent an October 31st letter to Mr. Jeffrey Zients who serves as Chief of Staff in the White House addressing the Clean Air Act National Ambient Air Quality Standard (“NAAQS”) for fine particulate matter...more

Williams Mullen

Recap from the Trenches: Reactions to EPA’s 2023 Big Air Agenda

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The first three quarters of 2023 have seen an unprecedented number of rulemakings under the Clean Air Act. The Biden administration has released a new suite of proposed rulemakings with a particular focus on climate change...more

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

Ozone/Clean Air Act: U.S. Environmental Protection Agency Announces New Review of National Ambient Air Quality Standard

The United States Environmental Protection Agency (“EPA”) announced it is initiating a new review of the Ozone National Ambient Air Quality Standard (“NAAQS”). EPA states it is taking this action based on advice provided...more

Foley Hoag LLP - Environmental Law

The EJ Movement Wants to Tighten the NAAQS. Will It Happen?

The White House Environmental Justice Advisory Council recently weighed in on EPA’s decision whether to lower the National Ambient Air Quality Standards for PM2.5 and ozone. Specifically, with respect to PM2.5, WHEJAC...more

Foley Hoag LLP - Environmental Law

What Happens When the EPA Technical Staff Disagrees with the Clean Air Science Advisory Committee?

Last week, the EPA Clean Air Science Advisory Committee provided EPA its review of EPA’s Policy Assessment for the Reconsideration of the National Ambient Air Quality Standard for ozone. As expected, CASAC has disagreed with...more

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

U.S. Environmental Protection Agency Clean Air Scientific Advisory Committee: Ozone National Ambient Air Quality Standards...

The United States Environmental Protection Agency (“EPA”) Clean Air Scientific Advisory Committee (“CASAC”) transmitted a June 9th letter to Administrator Michael S. Regan addressing: CASAC Review of the EPA’s Policy...more

Williams Mullen

EPA’s Big Plans for 2023: Top Air Rulemakings We Are Watching

Williams Mullen on

An environmental lawyer walks into a cocktail party. An often-asked question is: What is happening at EPA in your world? What should we be watching that could impact business as usual? Any surprises this year? This article...more

Williams Mullen

Environmental Notes - April 2023

Williams Mullen on

EPA’s Big Plans for 2023: Top Air Rulemakings We Are Watching - An environmental lawyer walks into a cocktail party. An often-asked question is: What is happening at EPA in your world? What should we be watching that...more

Foley Hoag LLP - Environmental Law

Deja Vu One More Time? What Will Happen If EPA Ignores CASAC Regarding the Ozone NAAQS?

Last week, Inside EPA (subscription required) reported that the Clean Air Science Advisory Committee has pretty much agreed that the National Ambient Air Quality Standards for ozone must be made more stringent. Apparently,...more

Morgan Lewis

EPA Issues ‘Good Neighbor’ Plan Addressing Interstate Transport Obligations

Morgan Lewis on

A recent US Environmental Protection Agency final rule seeks to ensure that nearly two dozen states reduce emissions from power plants and other industrial sources that contribute to challenges attaining and maintaining air...more

Robinson+Cole Environmental Law +

EPA’s Proposal to Tighten the Fine Particulate NAAQS: What's Proposed, Who's Potentially Impacted

On January 6, 2023, the U.S. Environmental Protection Agency (the EPA) released a pre-publication copy of a Proposed Rule, which will lower the annual National Ambient Air Quality Standard (NAAQS) for fine particulate matter...more

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