Not New
http://yosemite.epa.gov/opa/admpress.nsf/d0cf6618525a9efb85257359003fb69d/c7ea2f8196f225748525764900706d2f!OpenDocument
U.S. EPA
8 October 2009
EPA is designating 31 areas across the country as not meeting the agency’s daily standards for fine particle air pollution (PM 2.5), or particulate matter, which can cause a number of serious health problems including aggravated asthma, heart attacks, and premature death.