News & Analysis as of

Environmental Policies Clean Air Act National Ambient Air Quality Standards

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

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

Troutman Pepper

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

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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

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

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

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

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

Arkansas State Implementation Plan Revisions/Clean Air Act: U.S. Environmental Protection Agency Proposed Rule Addressing Startup,...

The United States Environmental Protection Agency (“EPA”) published a July 21st Federal Register Notice proposing to approve two revisions to the Clean Air Act Arkansas State Implementation Plan (“SIP”). See 88 Fed. Reg....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

King & Spalding

EPA Issues Final “Good Neighbor” Plan under the Clean Air Act

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The U.S. Environmental Protection Agency (EPA) finalized its plan under the Clean Air Act’s “good neighbor” provision (the “Plan”) on March 15, 2023. The Plan requires 23 states to reduce their air pollution that...more

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

Particulate Matter/Clean Air Act National Ambient Air Quality Standard: National Association of Clean Air Agencies Comments on...

The National Association of Clean Air Agencies (“NACAA”) submitted March 28th comments to the United States Environmental Protection Agency (“EPA”) addressing its proposed rule to strengthen the National Ambient Air Quality...more

Williams Mullen

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

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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

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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

Goldberg Segalla

EPA Proposes Revisions to Particulate Matter NAAQS Under the Clean Air Act

Goldberg Segalla on

In early January, the U.S. Environmental Protection Agency announced a proposal to revise and strengthen a key national ambient air quality standard (NAAQS) for fine particle pollution, also known as PM2.5. The Clean Air Act...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

Foley Hoag LLP - Environmental Law

PM2.5 Emissions From Wildfires -- No Longer So Exceptional!

Last week, the Clean Air Scientific Advisory Committee formally transmitted its recommendations to EPA Administrator Regan regarding the PM2.5 NAAQS. Consistent with trade press reporting over the past few months, the...more

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

PM 2.5/Soot/Clean Air Scientific Advisory Committee: Draft Letter Recommending Reconsideration of National Ambient Air Quality...

The Clean Air Scientific Advisory Committee (“CASAC”) sent a February 4th letter to the United States Environmental Protection Agency (“EPA”) addressing the following subject: CASAC Review of the EPA’s Policy Assessment for...more

Allen Matkins

California Environmental Law & Policy Update - November 2021

Allen Matkins on

EPA’s power to curb greenhouse gases faces Supreme Court scrutiny - Courthouse News Service – October 29 - The Supreme Court announced last Friday that it will hear challenges brought by the states of West Virginia...more

Foley Hoag LLP - Environmental Law

There’s No Doubt What EPA Staff Thinks Should Be the Result of EPA’s Reconsideration of the PM2.5 NAAQS

Late last week, EPA released an external review draft of the “Supplement to the 2019 Integrated Science Assessment for Particulate Matter.” For those of you who don’t recall, the original Integrated Science Assessment was the...more

Williams Mullen

Top Five Potential Air Permitting Reforms: How Air Permitting in Virginia Is Poised for Change

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The Virginia State Air Pollution Control Board (Air Board) took its first measurable step toward a change in air permitting by creating a Subcommittee on Public Participation Processes (the Subcommittee) on June 21, 2019. The...more

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