GeoData @ UCB

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You searched for: Publisher United States. Bureau of Transportation Statistics Remove constraint Publisher: United States. Bureau of Transportation Statistics Institution Stanford Remove constraint Institution: Stanford Place United States Virgin Islands Remove constraint Place: United States Virgin Islands Data type Polygon Remove constraint Data type: Polygon Year 1979 Remove constraint Year: 1979
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1. Nonattainment Areas for Ozone Pollution: United States and Territories, 1979

1979. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the ozone (O3) ... United States. Bureau of Transportation Statistics.