Release of a Draft Document Related to the Review of the National Ambient Air Quality Standards for Particulate Matter

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On or about September 4, 2019, the Environmental Protection Agency (EPA) will make available for public comment a draft document titled, Policy Assessment for Review of the National Ambient Air Quality Standards for Particulate Matter, External Review Draft (Draft PA). This draft document was prepared as part of the current review of the National Ambient Air Quality Standards (NAAQS) for Particulate Matter (PM). When final, the PA is intended to "bridge the gap" between the currently available scientific information and the judgments required of the Administrator in determining whether to retain or revise the existing NAAQS for PM.