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8-Hour Ozone (2008) Maintenance Area (Redesignated from Nonattainment) Summary

Data is current as of November 30, 2022


Classification Number of Areas Number of Counties 2010 Population
Extreme 0 0 0
Severe 15 0 0 0
Serious 1 11 9,179,738
Moderate 3 16 4,868,524
Marginal 9 65 18,667,921
SUBTOTAL 13 92 32,716,183
 
GRAND TOTAL 13 92 32,716,183

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