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EPA Finalizes Lowered PM2.5 NAAQS

Posted Friday, December 21st, 2012

On December 14, 2012, the U.S. Environmental Protection Agency (EPA) finalized its review of the current annual PM2.5 National Ambient Air Quality Standard (NAAQS), lowering it from 15 to 12 micrograms per cubic meter (μg/m3).  A copy of EPA’s final action is available here.   EPA did not finalize its proposal to set a secondary PM2.5 standard to address visibility (proposed at 30 or 28 deciviews).  Also, EPA is retaining the current 24-hour PM2.5 standard at 35 μg/m3 and retaining the existing standards for PM10.  EPA’s final action will be effective 60 days after publication in the Federal Register.

Significantly, 2009-2011 monitored air quality data for Florida is already in attainment with the final 12 μg/m3 standard.

For additional information contact Joseph Brown.

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