EPA Clean Air Scientific Advisory Committee (CASAC)

The Clean Air Scientific Advisory Committee (CASAC) provides independent advice to the EPA Administrator on the technical bases for EPA's National Ambient Air Quality Standards.
  • More about the CASAC
    Established in 1977 under the Clean Air Act (CAA) Amendments of 1977 (see 42 U.S.C. 7409(d)(2)), CASAC also addresses research related to air quality, sources of air pollution, and the strategies to attain and maintain air quality standards and to prevent significant deterioration of air quality. The Chair of the CASAC also serves as a member of the chartered Science Advisory Board.
  • About this Website

    This website provides information on:

    • the committees and membership of the CASAC, including the annual process for nominating and providing comment on candidate experts to serve on the chartered CASAC and CASAC standing committees,
    • CASAC advisory activities and reports,
    • how you can participate in the science advisory process, including the use of EPA's Web-based process for public nomination of experts, and
    • how to contact the CASAC's Designated Federal Officer to obtain additional information about the CASAC.
    Our recent additions page provides information on recent draft reports, Federal Register notices, upcoming meetings, recently announced advisory activities, and recently finalized reports.

  • Recent additions and CASAC Recent Happenings RSS More about RSS news feeds (USA.gov)

Recent Reports

Advisory Reports
  • 12/10/2018 - Consultation on the EPA’s Integrated Review Plan for the Review of the Ozone National Ambient Air Quality Standards (External Review Draft – October 2018)
  • 04/30/2018 - CASAC Review of the EPA’s Policy Assessment for the Review of the Primary National Ambient Air Quality Standard for Sulfur Oxides (External Review Draft - August 2017)
  • 04/30/2018 - CASAC Review of the EPA’s Risk and Exposure Assessment for the Review of the Primary National Ambient Air Quality Standard for Sulfur Oxides (External Review Draft - August 2017)
  • 09/28/2017 - CASAC Review of the EPA’s Integrated Science Assessment for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter – Ecological Criteria (First External Review Draft – February 2017)
  • 06/30/2017 - CASAC Review of the EPA’s Integrated Science Assessment for Sulfur Oxides – Health Criteria (Second External Review Draft – December 2016)
More Reports and Agency Responses

Committees, Panels and Membership