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

Data is current as of August 31, 2021

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Classification	Number of Areas	Number of Counties	2010 Population
Serious	6	13	22,149,374
Moderate	59	53	11,359,965
Nonattainment	0	0	0
SUBTOTAL	65	66	33,509,339
GRAND TOTAL	65	66	33,509,339

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