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8-Hour Ozone (2008) Nonattainment Area Summary

Data is current as of October 31, 2018


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 14 81 56,529,295
Marginal 15 62 24,173,334
SUBTOTAL 37 160 104,719,073
 
GRAND TOTAL 37 160 104,719,073

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