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

Data is current as of September 30, 2017

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 2 2 0 2 2 2 0 824,175 824,175 824,175 0
Moderate 3 16 15 1 17 97 82 15 8,945,948 61,377,488 56,624,471 4,753,017
Marginal 36 23 16 7 192 112 70 42 90,136,579 37,705,039 26,744,587 10,960,452
SUBTOTAL 46 46 38 8 227 225 168 57 123,003,795 123,003,795 107,290,326 15,713,469
   
GRAND
TOTAL
46 46 38 8 227 225 168 57 123,003,795 123,003,795 107,290,326 15,713,469

* 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 2009 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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