News & Analysis as of

Air Pollution Air Quality Standards Environmental Protection Agency (EPA)

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

Air Enforcement: Arkansas Department of Energy and Environment - Division of Environmental Quality and Searcy Compression Station...

The Arkansas Department of Energy and Environment - Division of Environmental Quality (“DEQ”) and Merit Energy Company, LLC (“Merit”) entered into a May 15th Consent Administrative Order (“CAO”) addressing an alleged...more

Womble Bond Dickinson

EPA Reconsiders Air Regulations Amid a Major Reorganization of the Air Office

Womble Bond Dickinson on

The EPA’s Office of Air and Radiation (“OAR”), responsible for most of the EPA’s major air regulatory and policy efforts, will be restructured in the months to come. This shakeup comes on the heels of the EPA’s announcement...more

J.S. Held

Assessing Wildfire Smoke Damage & Understanding Impacts of Wildfire Smoke on Air Quality

J.S. Held on

How Southern California Wildfires Impact Air Quality, Smoke Damage, and Insurance Coverage - The Southern California wildfires in January 2025 are expected to be one of the costliest natural disasters in United States (US)...more

Williams Mullen

Exceptional Events Part of North Carolina Particulate Air Quality Attainment Designation

Williams Mullen on

Effective May 2024, EPA tightened the annual health-based National Ambient Air Quality  Standard (NAAQS) for fine particulate matter (PM2.5) from 12.0 µg/m3 to 9.0 µg/m3. This change was made after a review of the available...more

Williams Mullen

Environmental Notes - April 2025

Williams Mullen on

Under the Clean Air Act, sources frequently must undergo “New Source Review” (NSR) permitting, which is a pre-construction permitting program. NSR establishes requirements for new or modified sources prior to initiating...more

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

Ozone/Clean Air Act: Kentucky Files Judicial Action Against U.S. Environmental Protection Agency for Alleged Delay in NAAQS...

The Commonwealth of Kentucky, Energy and Environment Cabinet and Louisville Metro Air and Pollution Control District (collectively, “Kentucky”) filed a Complaint in the United States District Court for the Western District of...more

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

Nitrogen Oxides/Clean Air Act: Center for Biological Diversity and U.S. Environmental Protection Agency Enter into Consent Decree...

The United States Environmental Protection Agency (“EPA”) and the Center for Biological Diversity (“CBD”) entered into an October 28th Consent Decree addressing an issue arising out of Section 108 and 109 of the Clean Air Act...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,...

Title V/Clean Air Act: Sierra Club Petition to Object Filed Addressing Pinal County, Arizona, Generating Station

The Sierra Club filed a May 13th Title V Petition to Object (“Petition”) before the United States Environmental Protection Agency (“EPA”) related to the Salt River Project Agricultural Improvement and Power District (“SRP”). ...more

WilmerHale

EPA and DOI Regulatory Roundup: Air Toxics and Carbon, Coal Ash, Wastewater, Methane, and Offshore Wind

WilmerHale on

The Biden-Harris Administration recently issued a suite of new rules aimed at addressing water and air quality, reducing methane emissions, protecting environmental justice communities, and accelerating the nation’s...more

Adams & Reese

EPA Greenlights Greenhouse Gas Emissions for Heavy-Duty Vehicles, But States File Lawsuit

Adams & Reese on

Less than a month after the Environmental Protection Agency (EPA) published environmental operational standards and greenhouse gas emission regulations for owners and operators of heavy-duty vehicles, including major freight...more

Foley Hoag LLP - Environmental Law

The D.C. Circuit Affirms EPA’s Reinstatement of California’s Authority to Set Auto Emissions Limits; Don’t Get Too Excited About...

On Tuesday, in Ohio v. EPA, the D.C. Circuit Court of Appeals denied several challenges to EPA’s decision to restore California’s authority under § 209(b) of the Clean Air Act to regulate emissions from motor vehicles. It’s...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

Benesch

Driving Change: CARB’s Impacts and Adaptations by Fleet Managers

Benesch on

Environmental regulations, including those under the California Air Resources Board’s (“CARB”) jurisdiction, present a complex compliance challenge for vehicle fleet managers and operations departments across the country....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

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

Foley Hoag LLP - Environmental Law

The D.C. Circuit Vacates Most of EPA’s SSM SIP Call; Generators Breath a Sigh of Relief

Earlier this month, the District of Columbia Court of Appeals vacated most of EPA’s startup, shutdown, and malfunction SIP Call. The Court’s rationale boils down to EPA’s failure to make a predicate finding that the SIP call...more

Quarles & Brady LLP

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

Quarles & Brady LLP on

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 Locke

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

Troutman Pepper Locke 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

Goldberg Segalla

SCOTUS Poised to Shove Thy Neighbor on EPA Law

Goldberg Segalla on

In March 2023, the EPA issued its final Good Neighbor Plan, the last in a series of legislations designed to reduce emissions of ozone-forming nitrogen oxide (NO2) which cross state borders. Specifically, the Plan was...more

Ballard Spahr LLP

EPA Proposes to Extend Air Transport Rule to Five More States

Ballard Spahr LLP on

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

McNees Wallace & Nurick LLC

EPA Significantly Lowers the National Ambient Air Quality Standard for Fine Particulate Matter

On Feb. 7, the U.S. Environmental Protection Agency published an update to the National Ambient Air Quality Standards (NAAQS) for fine particulate matter, commonly referred to as PM 2.5. The EPA announced that the annual...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

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