Title: EPA Proposes to Revise the NAAQS for Fine Particles

On June 14, 2012, the U.S. Environmental Protection Agency (EPA) proposed to strengthen the National Ambient Air Quality Standards (NAAQS) for fine particulate matter (PM2.5). The agency also proposed to retain the existing standards for coarse particulate (PM10). For fine particles, this proposal would: · Strengthen the annual health standard for fine particles by setting the standard at a level within the range of 12 micrograms per cubic meter (µg/m3) to 13 µg /m3. The current annual standard, 15 µg/m3, has been in place since 1997. · Retain the existing 24-hour fine particle standard at 35 µg/m3. EPA set the 24-hour standard in 2006. · Set a separate fine particle standard to improve visibility, primarily in urban areas. EPA is proposing two options for this 24- hour standard, at 30 deciviews or 28 deciviews. · Retain existing secondary standards for PM2.5 and PM1 0 identical to primary standards to provide protection against other effects, such as ecological effect, effects on materials, and climate impacts.

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Company  Product  Process  Other  Subjects  Event  Event  Date  Location  Publication  Publication  Date Text  Descriptor
  • McIlvaine

 

  • EPA

  • Particulates

  • Regulation

 

 

 

 

  • 10/1/2012

 

  • Article