Nonattainment Area - Particulate Matter - 2.5 24 hr (2006 Standard)
The Nonattainment Area - Particulate Matter-2.5 24 hr (2006) dataset was designated on December 14, 2009 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). This dataset …