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8-Hour Ozone (2008) Nonattainment Area Summary

Data is current as of July 31, 2019


Classification Number of Areas Number of Counties 2010 Population
Extreme 2 12 19,561,850
Severe 15 3 9 3,535,243
Serious 3 3 919,351
Moderate 15 81 56,529,295
Marginal 15 62 24,173,334
SUBTOTAL 38 160 104,719,073
 
GRAND TOTAL 38 160 104,719,073

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