Release of Final Documents Related to the Review of the National Ambient Air Quality Standards for Particulate Matter

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The Office of Air Quality Planning and Standards (OAQPS) of EPA is announcing the availability of two final documents titled, Quantitative Health Risk Assessment for Particulate Matter and Particulate Matter Urban-Focused Visibility Assessment. These two documents describe the quantitative analyses that have been conducted as part of the review of the national ambient air quality standards (NAAQS) for particulate matter (PM).