Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter Integrated Science Assessment - Ecological Criteria (First External Review Draft)


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 oxides of nitrogen and oxides of sulfur. Secondary standards set limits to protect public welfare, including protection against decreased visibility, damage to animals, crops, vegetation, and buildings.EPA's Office of Research and Development has requested a peer review of the First External Review Draft of its Integrated Science Assessment for Oxides of Nitrogen and Sulfur & Welfare Criteria. The final Integrated Science Assessment is intended to provide a synthesis and evaluation of science relevant for reviewing and revising the secondary (welfare-based) standard for the Nitrogen Dioxide and Sulfur Dioxide NAAQS.

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Panel Formation

Nominations of Experts:


Public Meetings and/or Teleconferences

Meeting DateTitle
08/31/2017 to 08/31/2017Public Teleconference of the Chartered Clean Air Scientific Advisory Committee (CASAC) and the CASAC Secondary NAAQS Review Panel for Oxides of Nitrogen and Sulfur
05/24/2017 to 05/25/2017Secondary NAAQS Review Panel for Oxides of Nitrogen and Sulfur

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Agency Response

Agency Response

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