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

Data is current as of December 31, 2021
  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 1 1 0 32 24 24 0 25,711,980 20,217,137 20,217,137 0
Marginal 38 39 38 1 153 162 158 4 74,984,197 79,804,969 78,154,693 1,650,276
Marginal (Rural Transport) 2 3 2 1 2 2 2 0 31 17,035 17,004 31
SUBTOTAL 51 53 51 2 200 209 205 4 122,354,605 127,192,381 125,542,074 1,650,307
   
GRAND
TOTAL
51 53 51 2 200 209 205 4 122,354,605 127,192,381 125,542,074 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 across groups.

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