PM-10 (1987) Nonattainment Area Summary

Data is current as of May 31, 2021

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Classification	Number of Areas	Number of Counties	2010 Population
Serious	5	5	4,527,094
Moderate	20	19	2,708,713
SUBTOTAL	25	23	7,235,807
GRAND TOTAL	25	23	7,235,807

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