Jump to main content.


8-Hour Ozone (1997) Nonattainment Area Summary

As of December 05, 2013
Populations are based on the 2010 census

  Number of    Attainment
Classification Areas  Counties Population  Date

Extreme  2  12  19,560,500  06/2024
Severe 17  1  1  913  06/2021
Severe 15  4  17  9,429,685  06/2019
Serious  3  16  9,707,337  06/2013
Moderate  21  140  57,340,606  06/2010
Marginal  8  36  16,454,819  06/2007
 
   SUBTOTAL:   39   216  112,493,860
 

   GRAND TOTAL:   39  216  112,493,860

County subtotals and grand totals may not equal sum of parts. Part counties are only counted one time within groupings. Multi-state nonattainment areas are not considered maintenance areas until all state in the area have been redesignated 8-Hr Ozone classified area designations for the 1997 standard were effective on June 15, 2004. 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.


Local Navigation


Jump to main content.