United States Non-Attainment Areas: Particulate Matter 2.5, 2008
- Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS) and Federal Highway Administration, Office of Planning, HEPP-1
- Non-Attainment Areas: Particulate matter 2.5 is a polygon theme representing areas in the United States that do not meet the National Ambient Air Quality Standard for PM-2.5: particle matter with an aerodynamic diameter smaller than 2.5 micrometers.
- Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
- United States
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