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8-Hour Ozone (2008) Nonattainment Area Summary

As of February 13, 2017


Classification Number of Areas Number of Counties 2010 Population
Extreme 2 12 19,561,850
Severe 15 3 9 3,535,243
Serious 2 2 824,175
Moderate 16 97 61,377,488
Marginal 18 84 29,466,125
SUBTOTAL 41 197 114,764,881
 
GRAND TOTAL 41 197 114,764,881

County subtotals and grand totals may not equal sum of parts. Part counties are only counted one time within groupings. Multi-state nonattainment areas are not considered maintenance areas until all states in the area have been redesignated