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PM-2.5 (2006) Nonattainment Area Summary

As of September 22, 2016
Classification Number of Areas Number of Counties 2010 Population
Serious 2 12 19,558,407
Moderate 14 34 12,780,620
SUBTOTAL 16 46 32,339,027
GRAND TOTAL 16 46 32,339,027

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

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