Description: Air Quality Non-Attainment and Maintenance Areas, 2007 - Shows areas in Indiana designated as non-attainment for ozone and (or) PM-2.5, or maintenance for ozone, carbon monoxide, lead, sulfur dioxide, and (or) PM-10. A non-attainment area is an area that does not meet (or that contributes to ambient air quality in a nearby area that does not meet) the national primary or secondary ambient air quality standard (NAAQ) for the pollutant. Maintenance areas are areas which were previously non-attainment (did not meet NAAQ standards for the pollutant) but have now been designated attainment (now meeting the standards). Attributes include fields named 'Pollutants' (listing one or more pollutants) and 'Status' (listing designations such as 'Non-attainment,' 'Maintenance,' and others). Data were obtained from the Bureau of Transportation Statistics, National Transportation Atlas Databases (NTAD).