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

Data is current as of February 28, 2023

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Classification	Number of Areas	Number of Counties	2010 Population
Serious	6	13	22,149,374
Moderate	62	55	11,241,369
Nonattainment	0	0	0
SUBTOTAL	68	68	33,390,743
GRAND TOTAL	68	68	33,390,743

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