EPA Clean Air Scientific Advisory Committee (CASAC)

Nitrogen Dioxide and Sulfur Dioxide Integrated Plan for Secondary (Welfare-based) National Ambient Air Quality Standards (NAAQS)

EPA Designated Federal Officer (DFO):Kyndall Barry

Responsible Committee/Panel:Oxides of Nitrogen (NOx) and Sulfur Oxides (SOx) Secondary Review Panel
A list of members can be found in the final report included in the Advisory Activity linked to this panel or committee.

BACKGROUND.

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EPA’s Office of Air and Radiation has requested advice to help in revising the secondary (welfare-based) National Ambient Air Quality Standards (NAAQS) for Nitrogen Dioxide and Sulfur Dioxide. 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 carbon monoxide. Secondary standards set limits to protect public welfare, including protection against decreased visibility, damage to animals, crops, vegetation, and buildings.

An early step in EPA’s new process for revising the secondary NAAQS is to develop a plan for reviewing the science associated with the secondary NAAQS. EPA has requested that CASAC provide consultative advice on EPA’s Draft Plan for Review of the Secondary National Ambient Air Quality Standards for Nitrogen Dioxide and Sulfur Dioxide.