News & Analysis as of

Regulatory Standards National Ambient Air Quality Standards

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

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

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

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

Particulate Matter NAAQS/Clean Air Act: U.S. Environmental Protection Agency Retains Current Standard

The United States Environmental Protection Agency (“EPA”) announced it is proposing to retain the current Clean Air Act National Ambient Air Quality Standard (“NAAQS”) for particulate matter (“PM”). The PM standard includes...more

(ACOEL) | American College of Environmental...

When is risk reduction not a benefit?

EPA filed a status report on October 15 in the slow-moving mercury and air toxics (MATS) litigation, which is now Murray Energy Corp. v. EPA, No. 16-1127 (D.C. Cir., filed April 26, 2016). The case is a challenge to EPA...more

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

Ozone/Clean Air Act: EPA Staff Proposal Retains Current Primary and Secondary National Ambient Air Quality Standards

The United States Environmental Protection Agency (EPA) on Halloween published a draft policy assessment recommending that the current National Ambient Air Quality Standards (“NAAQS”) of 70 parts per billion (ppb) be...more

Foley Hoag LLP - Environmental Law

Will The PM NAAQS Be the Real End of Agency Deference?

According to Bloomberg Environment (subscription required), EPA’s Clean Air Science Advisory Committee cannot reach agreement whether to recommend that the NAAQS for PM2.5 be lowered. Even after two years, I guess I had not...more

BakerHostetler

EPA Releases Revised Ozone NAAQS

BakerHostetler on

On October 1, the Environmental Protection Agency issued a prepublication version of a final rule establishing a new National Ambient Air Quality Standard (NAAQS) for ozone. The final rule lowers the primary and secondary...more

Jackson Walker

EPA Finalizes Tougher Ozone Standards

Jackson Walker on

On October 1, 2015, the U.S. Environmental Protection Agency (EPA) released its final rule lowering the ozone National Ambient Air Quality Standards (NAAQS) from 75 parts per billion (ppb) to 70 ppb nationwide (2015 Ozone...more

Pierce Atwood LLP

Pierce Atwood Environmental Regulatory Compliance Calendar (RCC)

Pierce Atwood LLP on

NEW REGULATORY DEVELOPMENTS - Federal - Final 2014 Effluent Guidelines Program Plan and 2014 Annual Effluent Guidelines Review Report EPA is announcing the availability of its Final 2014 Effluent Guidelines...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

Clark Hill PLC

EPA Proposes Eliminating State Regulations as to Startup, Shutdown, and Malfunction Emissions

Clark Hill PLC on

Operating conditions during periods of startup, shutdown, and malfunction (SSM) are not normal and often result in unrepresentative emissions that exceed permitted limitations. Originally published in The Natural Gas &...more

Bergeson & Campbell, P.C.

EPA Proposes Stricter Ozone NAAQS

On November 25, 2014, EPA proposed to strengthen the National Ambient Air Quality Standard (NAAQS) for ground-level ozone. The rule is available online and should be published soon in the Federal Register....more

Foley Hoag LLP - Environmental Law

Coming To An Air Quality District Near You: A More Stringent Ozone NAAQS

As we have noted previously, EPA has had difficulty in promulgating a revised National Ambient Air Quality Standard for ozone. Whenever the revised NAAQS is issued – and EPA is under court deadline to propose a draft by...more

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