EPA has published a provisional assessment of recent studies on the health effects of particulate matter exposure. The assessment finds that new studies of fine and coarse particles document adverse effects at lower concentrations than the studies reviewed in the 2004 Criteria Document.
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EPA published the final ozone Air Quality Criteria Document laying out the latest scientific evidence of the adverse health effects of ozone on March 21, 2006.
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EPA has published a second and final draft ozone Criteria Document for public review and comment. The 1,800 page document includes a summary report, and detailed annexes for each of the chapters.
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In the first major step toward reviewing the National Ambient Air Quality Standards (NAAQS) for ozone, the U.S. EPA has published a draft criteria document for public comment and peer review.
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Inhalation of diesel exhaust emissions is likely to pose a lung cancer hazard to humans, according to an EPA report.

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The U.S. Environmental Protection Agency (EPA) has released for public review and comment the “Fourth External Review Draft of Air Quality Criteria for Particulate Matter (June, 2003).”

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EPA has issued the fifth revised drafts of the Toxicology and Epidemiology chapters of the Criteria Document on particulate matter for public review.
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The U.S. Environmental Protection Agency (EPA) has released the final scientific assessment document on airborne particles, entitled the Air Quality Criteria for Particulate Matter.
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EPA has extended the schedule for the completion of the PM Criteria Document by one year, to October 2003, to allow for additional analysis of key studies.
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In May 2002, EPA published the third External Review Draft of the Criteria Document on particulate matter.
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