PM reduction proposal not aimed at trucks, EPA says

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A new Environmental Protection Agency proposal is aimed at reducing standards for fine particle matter (PM), but is not specifically targeting trucks.

“Our nation’s air is the cleanest it has been in over a generation, and today’s proposal begins our next step in the steady march toward cleaner air and healthier lives by addressing particle pollution,” says EPA Administrator Stephen L. Johnson.

The proposed revisions will address two categories of particulate matter: fine particles, which are particles 2.5 micrometers in diameter; and smaller, inhalable, coarse particles, which are between 2.5 and 10 micrometers. While the proposal is not likely to affect 2007 or 2010 mobile diesel-engine emissions regulations, it will encourage limits on truck idling and foster more stringent state regulations on stationary-power and off-road PM emissions.

EPA is seeking comments on a number of alternative levels for PM standards, including retaining the current standards. The agency will accept public comment for 90 days following publication of the proposal in the Federal Register, and also will hold three public hearings. For more information, go to