PM-2.5 (2006) Nonattainment Area Summary

Data is current as of June 30, 2021

---

Classification	Number of Areas	Number of Counties	2010 Population
Serious	5	19	21,828,537
Moderate	8	19	9,486,143
SUBTOTAL	13	38	31,314,680
GRAND TOTAL	13	38	31,314,680

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