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Particulate Matter Risk/Exposure Assessments for National Ambient Air Quality Standards (NAAQS) Review

EPA Designated Federal Officer (DFO):Holly Stallworth

Responsible Committee/Panel:CASAC Particulate Matter Review Panel
A list of members can be found in the final report included in the Advisory Activity linked to this panel or committee.

PLEASE NOTE: Some of the items mentioned in this page are in Adobe's Portable Document Format (PDF). To view or print them you will need to have the Adobe Acrobat Reader program installed on your computer. The Reader can be downloaded and used with no charge. Click here for more information from EPA on PDF files.


EPA’s Office of Air and Radiation (OAR) has requested that CASAC review draft risk and exposure assessments for the primary (health-based) and secondary (welfare-based) standards for the national ambient air quality standards for particulate matter. 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 particulate matter.

The CASAC plans to review two drafts of the Agency's risk and exposure assessments. OAR's assessments for particulate matter are entitled Risk Assessment to Support the Review of the PM Primary National Ambient Air Quality Standards: External Review Draft and Particulate Matter Urban-Focused Visibility Assessment: External Review Draft .

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