PM-2.5 (2012) Nonattainment Area Summary

Data is current as of May 31, 2026

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Classification	Number of Areas	Number of Counties	2010 Population
Serious	3	13	19,564,250
Moderate	1	1	154,061
SUBTOTAL	4	14	19,718,311
GRAND TOTAL	4	14	19,718,311