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State Air Regulations Can Go Above and Beyond National Standards 

Legal Planet

States and local air quality regulators have the legal authority to set particulate matter (PM), ozone, and nitrogen oxides (NOx) emissions standards and adopt regulations for these pollutants when they are already in attainment of the national ambient air quality standards ( NAAQS ) set by the U.S.

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EPA Will Reconsider the Ozone NAAQS — What Is An Adequate Margin of Safety, Anyway?

Law and Environment

On Friday, EPA announced that it was reconsidering its 2020 decision to leave the National Ambient Air Quality Standards for ozone unchanged. However, EPA stated that it: will reconsider the decision to retain the ozone NAAQS in a manner that adheres to rigorous standards of scientific integrity. Still whistling in the wind , I fear.

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Improving EPA’s Latest Ozone Transport Rule

Acoel

The agency’s air quality modeling indicates that most areas would receive an ozone reduction of less than 0.1 These air quality impacts are minimal compared with the major ozone reductions resulting from the 1998 SIP Call, which resulted in more than 80,000 megawatts of coal capacity being retrofitted with SCRs. ppb by 2025.

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DC Circuit dismisses utility-backed challenge to EPA cross-state ozone rule

Environmental News Bits

A federal appeals court on Friday dismissed a lawsuit brought by a utility-supported organization that sought to overturn the Environmental Protection Agency’s revised 2021 Cross-State Air Pollution Update Rule for ozone.

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Climate Change Threatens Already Poor Air Quality in California’s Central Valley

Union of Concerned Scientists

Bakersfield, Fresno, and Visalia are consistently ranked as cities with the worst particulate and ozone pollution , according to the American Lung Association. and ozone concentrations highlighting air quality issues in the Central Valley. Annual average PM2.5 Graphics from CalEnviroScreen 4.0

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Why the Bay Area’s Zero-Emission Appliance Rule is a Big Deal

Legal Planet

Several cities in California, including Los Angeles and in the Bay Area, have outlawed new gas hookups, but these are the first regulations that would effectively ban the sale of gas appliances. Additionally, NOx react with other chemicals in the air to create other harmful pollutants, like fine particulate matter and ozone.

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

Law and Environment

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. Instead, CASAC recommends a significantly lower ozone NAAQS of 55-60 ppb.

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