PM-10 (1987) Maintenance Area (Redesignated from Nonattainment) Summary

Data is current as of August 31, 2020

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Classification	Number of Areas	Number of Counties	2010 Population
Serious	5	15	22,002,469
Moderate	57	60	11,316,941
SUBTOTAL	62	74	33,319,410
GRAND TOTAL	62	74	33,319,410

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