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US EPA, in response to court order, finalizes revised fine particle standards

2:58 PM MST | December 14, 2012 | Kara Sissell

EPA has finalized changes to annual requirements for reducing fine particles (PM 2.5), or soot, from the prior 15 micrograms/cubic meter (mg/cu meter), to 12 mg/cu meter. EPA's science advisory panel had recommended a standard of 11–13 mg/cu meter. The standard for daily PM 2.5 concentrations and for the coarser PM 10 standard will remain unchanged, EPA says. The revised annual standard is part of a court order to settle a lawsuit by the American Lung Association (Washington), which had filed suit to compel EPA to comply with a Clean Air Act requirement...

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