Jump to main content.


8-Hour Ozone (1997) Nonattainment Area Summary with History

As of December 05, 2013
All populations are updated for the 2010 census.

  NUMBER OF AREAS NUMBER OF COUNTIES 2010 POPULATION
  OriginalAdjusted    OriginalAdjusted    Original Adjusted      
Classification 20042004 Today Redesignated 20042004 Today Redesignated 2004 2004  Today  Redesignated

Extreme 0 2 2 0 0 12 12 0 0   19,560,500   19,560,500   0
Severe 17 1 1 1 0 4 1 1 0 15,718,827   913   913   0
Severe 15 0 4 4 0 0 17 17 0 0   9,429,685   9,429,685   0
Serious 3 3 3 0 15 16 16 0 6,511,922   9,707,337   9,707,337   0
Moderate 30 30 21 9 185 182 140 42 87,026,630   77,399,716   57,340,606   20,059,110
Marginal 7 18 8 10 55 77 36 41 15,252,289   27,258,053   16,454,819   10,803,234
 
   SUBTOTALS: 41 58 39 19 255 299 216 83 124,509,668   143,356,204   112,493,860   30,862,344
 
Former Subpart 1 71 56 0 56 172 136 0 136 37,634,461   22,506,809   0   22,506,809
 
   SUBTOTALS: 71 56 0 56 172 136 0 136 37,634,461   22,506,809   0   22,506,809
 
Marginal EAC 1 0 0 0 8 0 0 0 1,412,199   0   0   0
Subpart 1 EAC 13 0 0 0 41 0 0 0 9,486,189   0   0   0
 
   SUBTOTALS: 14 0 0 0 49 0 0 0 10,898,388   0   0   0
 

   GRAND
   TOTALS:
126 114 39 75 474 435 216 219 173,042,517   165,863,013   112,493,860   53,369,153


County subtotals and grand totals may not equal sum of parts. Part counties are only counted one time within groups.

See adjustments to original 2004 nonattainment areas or this report based on 2000 populations.

The Greensboro EAC area was reclassified from Moderate EAC to Marginal EAC on November 2004. This table reflects the original area status after the reclassfication to Marginal EAC. Based on air quality data from 2005, 2006 and the first three quarters of 2007, the Denver CO Subpart 1 EAC area was designated nonattainment for 8-hour Ozone, effective November 20, 2007. The remaining thirteen (13) 8-Hr EAC areas were designated attainment on April 15, 2008.

On June 8, 2007, the United States Court of Appeals vacated the Subpart 1 portion of the Phase 1 Rule (Court Order) (PDF). On May 14, 2012, the Former Subpart 1 nonattainment areas were classified under Subpart 2 (77 FR 28424 ) (PDF), effective June 13, 2012.


Go Top

Jump to main content.