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National Assessment of Toxic Air Pollutants
March 23, 2006
EPA develops National-Scale Air Toxics Assessment (NATA) in cooperation with state and local environmental agencies, which provide key information about air toxics emissions.
The assessment estimates that in most of the United States people have a lifetime cancer risk from air toxics between 1 and 25 in a million. This means that out of one million people, between 1 and 25 people have increased likelihood of developing cancer as a result of breathing air toxics from outdoor sources, if they were exposed to 1999 levels over the course of their lifetime (70 years). The assessment estimates that most urban locations have an air toxics lifetime cancer risk greater than 25 in a million. Risk in transportation corridors and some other locations is greater than 50 in a million. In contrast, one out of every three Americans (330,000 in a million) will develop cancer during a lifetime, when all causes (including exposure to air toxics) are taken into account.
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