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

Data is current as of August 31, 2023
  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 19,544,668 19,544,668 19,544,668 0
Severe 15 2 3 3 0 0 1 1 0 1,291,989 4,369,276 4,369,276 0
Serious 2 5 5 0 1 8 8 0 821,740 3,239,296 3,239,296 0
Moderate 5 25 24 1 32 154 147 7 25,711,980 85,677,823 80,973,080 4,704,743
Marginal 38 15 12 3 153 32 20 12 74,984,197 14,344,283 8,968,008 5,376,275
Marginal (Rural Transport) 2 3 1 2 2 2 1 1 31 17,035 0 17,035
SUBTOTAL 51 53 47 6 200 209 189 20 122,354,605 127,192,381 117,094,328 10,098,053
   
GRAND
TOTAL
51 53 47 6 200 209 189 20 122,354,605 127,192,381 117,094,328 10,098,053

* 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 across groups.

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