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1-Hour Ozone (1979) Nonattainment Area Summary with History - NAAQS Revoked

As of September 22, 2016
  NUMBER OF AREAS NUMBER OF COUNTIES 2010 POPULATION
Classif. Original BaselineAdjusted
Baseline*
Today Redesig Original BaselineAdjusted
Baseline*
Today Redesig Original BaselineAdjusted
Baseline*
Today Redesig
Extreme 1 2 2 0 4 12 12 0 13,000 17,784,954 17,784,954 0
Severe 17 5 6 6 0 52 51 51 0 31,683 35,418,992 35,418,992 0
Severe 15 4 7 6 1 22 61 48 13 11,525 20,434,856 16,736,177 3,698,679
Serious 14 13 8 5 86 50 38 12 22,724 24,962,154 16,125,782 8,836,372
Moderate 31 29 5 24 113 95 12 83 40,176 29,740,424 1,736,909 28,003,515
Marginal 42 39 16 23 89 86 38 48 19,533 21,489,868 7,367,934 14,121,934
Rural Transport (Marginal) 0 4 2 2 0 4 2 2 0 39,605 0 39,605
Other 1 2 1 1 5 14 9 5 1,362 8,063,463 6,541,828 1,521,635
SUBTOTAL 98 102 46 56 371 364 201 163 140,003 157,934,316 101,712,576 56,221,740
   
Section 185A 12 11 3 8 23 21 4 17 5,151 5,466,876 459,668 5,007,208
Incomplete Data 47 23 14 9 50 26 15 11 3,755 2,180,736 1,259,464 921,272
SUBTOTAL 59 34 17 17 73 47 19 28 8,906 7,647,612 1,719,132 5,928,480
   
GRAND
TOTAL
157 136 63 73 433 409 219 191 148,909 165,581,928 103,431,708 62,150,220

See the report listing these adjustments to the original nonattainment area baseline.

County subtotals and grand totals may not equal sum of parts. Part counties are only counted one time within groups. "Section 185A" was previously called "Transitional".

The Ohio portion of the Youngstown-Warren-Sharon OH-PA area is a maintenance area, while the Pennsylvania portion remains nonattainment. The redesignated area column of this report does not include the partially redesignated areas.

The former 1-hour ozone designations and classifications as of June 15, 2004, are being retained in subpart C of Part 81 for purposes of the anti backsliding provisions of 40 CFR 51.905. 40 CFR 51.905(c) references subpart C of part 81 for the areas affected by the anti-backsliding regulation.



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