Release of Draft Policy Assessment for the Review of the Primary National Ambient Air Quality Standards for Nitrogen Dioxide

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The Environmental Protection Agency (EPA) is reviewing the primary National Ambient Air Quality Standards (NAAQS) for Nitrogen Dioxide (NO 2 ). On or about September 23, 2016, the EPA will make available for public review the document titled Policy Assessment for the Review of the Primary National Ambient Air Quality Standards for Nitrogen Dioxide--External Review Draft (draft PA). This draft PA is intended to facilitate the Clean Air Scientific Advisory Committee's (CASAC's) advice and public input as part of the ongoing review of the primary NAAQS for NO 2 .