Nonattainment Area - 8 hr Ozone (2015 Standard)
The Nonattainment Area - 8 hr ozone (2015) dataset was designated on August 03, 2018 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 provides detailed …