PM-10 (1987) Nonattainment Area Summary

Data is current as of June 30, 2025

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Classification	Number of Areas	Number of Counties	2010 Population
Serious	5	5	4,527,094
Moderate	16	14	2,663,329
Nonattainment	0	0	0
SUBTOTAL	21	19	7,190,423
GRAND TOTAL	21	19	7,190,423

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