PM-2.5 (2006) Nonattainment Area Summary

Data is current as of June 20, 2017

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Classification	Number of Areas	Number of Counties	2010 Population
Serious	5	19	21,828,537
Moderate	11	27	10,510,490
SUBTOTAL	16	46	32,339,027
GRAND TOTAL	16	46	32,339,027

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