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Start Over Year 1979 Place American Samoa Bounding Box -86.51116 39.149274 -86.508949 39.150938

1. Nonattainment Areas for Ozone Pollution: United States and Territories, 1979

Stanford University Public content
1979. Stackhouse, Cecil and United States. Bureau of Transportation Statistics. 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.