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NAAQS


Coal Plants May Get Scrubber Reprieve from Proposed EPA NAAQS Redesignations
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The Environmental Protection Agency (EPA) has moved to redesignate four new areas of Missouri, Nebraska, Ohio, and Texas as being in attainment of air quality standards for sulfur dioxide (SO2). …


EPA Reinterprets ‘Ambient Air,’ Further Tweaks New Source Review 

The Environmental Protection Agency (EPA) has finalized a change to a long-standing policy interpreting “ambient air”—a foundational concept under the Clean Air Act that applies to all types of air…


EPA to Retain Primary NAAQS for Sulfur Dioxide
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The Environmental Protection Agency (EPA) will refrain from amending the National Ambient Air Quality Standards (NAAQS) for sulfur dioxide (SO2), retaining a 2010 rule, which it said adequately protects public…


Clean Air Act Issues Congress Could Grapple With in New Session
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While the Republican-led U.S. House and Senate in the 115th Congress was mainly focused on reviewing, for modification or repeal, several environmental rules issued under the Clean Air Act (CAA),…


THE BIG PICTURE: Trump’s Regulatory Targets

President Trump campaigned on a promise to reduce regulation and control regulatory costs. One of his first actions after taking office was to issue an executive order calling for the…