As of August 30, 2011, there were 44 ozone (8-hour
1997 standard), 9 sulfur dioxide, 45 PM-10, 39 PM-2.5 (1997 Standard),
32 PM-2.5 (2006 Standard), 2 lead (original standard), and 16
lead (2008 Standard) in
the United States. There are no CO and NO2 nonattainment areas
in the United States. Maps of the ozone,
carbon monoxide, sulfur dioxide, lead, PM-10, and PM-2.5 nonattainment
areas are on this web site for your review and download.
