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PM-2.5 (1997) Nonattainment Area Summary

Data is current as of September 30, 2017


Classification Number of Areas Number of Counties 2010 Population
Serious 1 8 3,842,165
Moderate 4 15 18,319,259
SUBTOTAL 5 23 22,161,424
 
GRAND TOTAL 5 23 22,161,424

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