Sulfur Oxides Risk and Exposure Assessment for Primary (Health-based) National Ambient Air Quality Standards (NAAQS)


Under the Clean Air Act, EPA is required to carry out a periodic review and revision, as appropriate, of the air quality criteria and the primary and secondary standards for six criteria air pollutants, which include sulfur oxides. EPA is currently reviewing the primary (health-based) NAAQS for sulfur dioxide (SO2) as an indicator for health effects caused by the presence of sulfur oxides in the ambient air. Primary standards set limits to protect public health, including the health of "sensitive" populations such as asthmatics, children, and the elderly. As part of the NAAQS review process, EPA's Office of Air and Radiation has requested CASAC review of the draft Risk and Exposure Assessment.

On this page:

See EPA’s PDF page to learn more about PDF files.


Panel Formation

Nominations of Experts:


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Public Meetings and/or Teleconferences

Meeting DateTitle
04/20/2018 to 04/20/2018Public Teleconference of the Chartered Clean Air Scientific Advisory Committee (CASAC) and CASAC Sulfur Oxides Panel
09/18/2017 to 09/19/2017Public Meeting of the Clean Air Scientific Advisory Committee (CASAC) Sulfur Oxides Panel

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