Nonattainment Area - 8 hr Ozone (1997 Standard)
The Nonattainment Area - 8 hr Ozone (1997) dataset was designated on June 15, 2004 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 …