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Air Quality Analysis

This site provides information for air quality data analysts inside and outside EPA. Much of the information is in the form of documented analyses that support EPA's National Ambient Air Quality Standards (NAAQS) reviews. The site also contains other documented analyses of special interest.

NAAQS Review Analysis

  • Learn more about the NAAQS Review Process
  • Analyses supporting the review process for:
    • Carbon Monoxide
    • Lead
    • Nitrogen Dioxide
    • Ozone
    • Particulate Matter
    • Sulfur Dioxide

Exceptional Events Affecting Air Quality

  • Learn how exceptional events, such as wildfires, are handled with respect to the NAAQS 
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Last updated on June 16, 2021