8-Hour Ozone (2008) Nonattainment Area Summary

Data is current as of August 31, 2018

---

Classification	Number of Areas	Number of Counties	2010 Population
Extreme	2	12	19,561,850
Severe 15	3	9	3,535,243
Serious	3	3	919,351
Moderate	14	81	56,529,295
Marginal	16	70	26,744,587
SUBTOTAL	38	168	107,290,326
GRAND TOTAL	38	168	107,290,326

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