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PM-2.5 (1997) Nonattainment Area Summary

Data is current as of August 31, 2021


Classification Number of Areas Number of Counties 2010 Population
Serious 1 8 3,842,165
Moderate 3 6 15,746,553
SUBTOTAL 4 14 19,588,718
 
Former Subpart 1 0 0 0
SUBTOTAL 0 0 0
 
GRAND TOTAL 4 14 19,588,718

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