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Bureau of Transportation Statistics
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Climatology, Meteorology, And Atmosphere
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Transportation
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1. Non-attainment and Maintenance Areas for Air Pollutants: Indiana
2007. Research and Innovative Technology Administration and Bureau of Transportation Statistics. Polygons in this shapefile indicate areas in Indiana designated as non-attainment for ozone and (or) PM-2.5; or maintenance for ozone, carbon monox...