Abstract: On October 17, 2006, the EPA published its final revisions to the National Ambient Air Quality Standards (NAAQS) for particulate matter (particulates, or PM). The EPA reviewed more than 2,000 scientific studies and found that the evidence continued to support associations between exposure to particulates in ambient air and numerous significant health problems, including aggravated asthma, chronic bronchitis, reduced lung function, heart attacks, and premature death in people with heart or lung disease. Based on several analytical approaches, the EPA estimated that compliance with the new NAAQS will prevent 1,200 to 13,000 premature deaths annually, as well as substantial numbers of hospital admissions and missed work or school days due to illness. Although a tightening of the standards, the new particulates NAAQS are not as stringent as recommended by EPA staff or the independent scientific advisory committee (Clean Air Scientific Advisory Committee, or CASAC) mandated under the Clean Air Act.

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Topics: Air, Pollution, Government