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8-Hour Ozone (2008) Nonattainment Area Summary with History

Data is current as of March 31, 2019

Original 8-Hour Ozone (2008) areas were designated effective July 20, 2012.


  NUMBER OF AREAS NUMBER OF COUNTIES 2010 POPULATION
Classif. Original 2012 Baseline Adjusted
Baseline*
Today Redesig Original 2012 Baseline Adjusted
Baseline*
Today Redesig Original 2012 Baseline Adjusted
Baseline*
Today Redesig
Extreme 2 2 2 0 12 12 12 0 19,561,850 19,561,850 19,561,850 0
Severe 15 3 3 3 0 9 9 9 0 3,535,243 3,535,243 3,535,243 0
Serious 2 3 3 0 2 3 3 0 824,175 919,351 919,351 0
Moderate 3 15 14 1 17 96 81 15 8,945,948 61,282,312 56,529,295 4,753,017
Marginal 36 23 15 8 192 112 62 50 90,136,579 37,705,039 24,173,334 13,531,705
SUBTOTAL 46 46 37 9 227 225 160 65 123,003,795 123,003,795 104,719,073 18,284,722
   
GRAND
TOTAL
46 46 37 9 227 225 160 65 123,003,795 123,003,795 104,719,073 18,284,722

* Please Note: Changes can occur that adjust the original baseline counts, e.g., classification changes, area boundary changes, new areas designated nonattainment. See the report listing these adjustments to original 2012 nonattainment areas.

County subtotals and grand totals may not equal sum of parts. Part counties are only counted one time within groups.

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