EPA Releases Updated National Air Toxics
Assessment Tool
The fourth update of a computer tool used to explain the potential
health hazards associated with exposure to air toxins to federal,
state and local governments and other stakeholders was released in
March. The National Air Toxics Assessment (NATA) comprises 2005
emissions data submitted by various states for 178 pollutants. This
data is used to identify and prioritize air toxics, emission source
types and locations that pose the greatest concern for toxic emissions risks.
EPA uses NATA results to work with communities to create local
assessments, enhance the agency’s emissions inventories, and determine priorities for developing the air toxics monitoring network.
After air toxic hazards have been evaluated, state air agencies decide if it is necessary to take action to lower air toxics emissions.
According to EPA, air toxics emissions from industrial and mobile
sources were reduced by approximately 42 percent between 1990
and 2005.
Information about the 2005 National-Scale Air Toxics Assessment
is available from www.epa.gov/nata2005.
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