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8-Hour Ozone (2015) Nonattainment Area Summary with History

Data is current as of August 31, 2020
  NUMBER OF AREAS NUMBER OF COUNTIES 2010 POPULATION
Classif. Original 2018 Baseline Adjusted
Baseline*
Today Redesig Original 2018 Baseline Adjusted
Baseline*
Today Redesig Original 2018 Baseline Adjusted
Baseline*
Today Redesig
Extreme 2 2 2 0 12 12 12 0 0 19,544,668 19,544,668 0
Severe 15 2 2 2 0 3 3 3 0 0 1,291,989 1,291,989 0
Serious 2 2 2 0 2 2 2 0 0 821,740 821,740 0
Moderate 5 5 5 0 33 33 33 0 0 25,711,980 25,711,980 0
Marginal 38 39 38 1 157 158 154 4 0 76,698,970 75,048,694 1,650,276
Marginal (Rural Transport) 2 2 1 1 2 2 1 1 0 31 0 31
SUBTOTAL 51 52 50 2 209 201 196 5 0 124,069,378 122,419,071 1,650,307
   
GRAND
TOTAL
51 52 50 2 209 201 196 5 0 124,069,378 122,419,071 1,650,307

* 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 2018 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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