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Regulatory Agenda › Environmental Protection Agency (EPA) › National Ambient Air Quality Standards

Holland & Knight LLP

EPA Announces Deregulatory Initiative to "Power the Great American Comeback"

Holland & Knight LLP on

U.S. Environmental Protection Agency (EPA) Administrator Lee Zeldin announced on March 12, 2025, that EPA will undertake 31 distinct actions in an effort to advance President Donald Trump's Day One executive orders (EOs) to...more

Foley Hoag LLP - Environmental Law

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

Foley Hoag LLP - Environmental Law on

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

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

Robinson+Cole Environmental Law +

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

Robinson+Cole Environmental Law + on

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

EPA Proposes to Lower the PM2.5 NAAQS — Searching For the Goldilocks Level

Foley Hoag LLP - Environmental Law on

EPA has finally proposed revisions to the national ambient air quality standard for PM2.5. The Administrator is proposing to lower the standard from 12.0 ug/m3 to a range of 9.0 to 10.0 ug/m3....more

Vinson & Elkins LLP

Could EPA Regulate Methane And Ethane As Volatile Organic Compounds Under The Clean Air Act?

Vinson & Elkins LLP on

On April 6, 2021, more than 400 environmental non-governmental organizations (ENGOs) submitted to EPA a “Petition for Rulemaking to Remove Methane and Ethane from ‘Negligibly Reactive’ Volatile Organic Compounds List.” If...more

K&L Gates LLP

Can You Feel New Regulations in the Air? EPA Announces Steps That It Will Take to Reduce Methane and VOC Emissions from Oil and...

K&L Gates LLP on

In recent years, the proliferation of oil and gas production, transmission, and distribution activities in the United States has led to a number of regulatory initiatives by state and federal agencies designed to manage new...more

Pillsbury Winthrop Shaw Pittman LLP

Three Obstacles to EPA’s O3 Rule: Industry Opposition, Implementation, and Congressional Oversight

Pillsbury Winthrop Shaw Pittman LLP on

The U.S. Environmental Protection Agency (EPA) recently proposed revising the national air quality standard for ozone, the key pollutant in smog and regional haze. EPA acknowledges that the rule will cost billions of dollars...more

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