EPA, States Face Looming NAAQS Dilemma On ‘Exceptional’ Events Waivers

January 5, 2022
EPA and states face an increasingly acute dilemma over how to set and enforce federal air quality standards in the face of evidence suggesting tougher limits are needed, and the increasing relevance of “exceptional” events such as wildfires, for which states require waivers, that complicate their attainment of the standards. Large wildfires “risk eroding progress” in air quality, Barbara Turpin, a professor of atmospheric chemistry at the University of North Carolina, who is advising EPA on its review of its...


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