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 California Air Resources Board (ARB) and the Office of Environmental Health Hazard Assessment (OEHHA) have commenced a review of the state’s ambient air quality standards for ozone and nitrogen dioxide.

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Members of EPA’s Clean Air Science Advisory Committee (CASAC) made numerous suggestions to strengthen EPA’s proposed methodology for conducting a risk assessment on coarse particles (PM10-PM2.5) at a May 1, 2003 teleconference.

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EPA has agreed to a schedule for reviewing the National Ambient Air Quality Standards for particulate matter and ozone in a court settlement with the American Lung Association® and a coalition environmental groups.
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The California Air Resources Board has adopted stricter new ambient air quality standards for particulate matter, in response to state legislation calling for a review of air standards.
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Staff scientists at EPA are suggesting that the health standards for fine particles need to be strengthened because scientific studies show serious health effects, even death, can occur at levels below the current standards.
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U.S. EPA Administrator Mike Leavitt has appoinited Dr. Rogene Henderson as the new Chair of the Clean Air Scientific Advisory Committee (CASAC).
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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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