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PM-2.5 (2006) Nonattainment Area Summary

Data is current as of September 30, 2021


Classification Number of Areas Number of Counties 2010 Population
Serious 5 19 21,828,537
Moderate 8 19 9,486,143
SUBTOTAL 13 38 31,314,680
 
Former Subpart 1 0 0 0
SUBTOTAL 0 0 0
 
GRAND TOTAL 13 38 31,314,680

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