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Areas With the 1-hour Standard Revoked April 15, 2009 or November 20, 2008

As of June 15, 2005
* Design values for 2001-2003 period.

Areas Listed Alphabetically 8-hour*
Design
Value
(ppm)
1-hour*
Design
Value
(ppm)
Category/
Classification
2000
Pop.
(1000's)
No. of
1-Hour**
Counties
No. of
8-Hour
Counties
EPA
Region
State
Berkeley and Jefferson Counties, WV 0.086 0.105 Subpart 1 EAC     118 0 2 3 WV
Chattanooga, TN-GA 0.088 0.113 Subpart 1 EAC     372 0 3 4 TN-GA
Columbia, SC 0.089 0.108 Subpart 1 EAC     494 0 2 4 SC
Denver-Boulder-Greeley-Ft Collins-Love., CO* 0.087 0.114 Subpart 1 EAC     2,811 7 9 8 CO
Fayetteville, NC 0.087 0.108 Subpart 1 EAC     302 0 1 4 NC
Frederick Co, VA 0.085 0.106 Subpart 1 EAC     82 0 2 3 VA
Greensboro-Winston Salem-High Point, NC 0.093 0.121 Marginal EAC     1,285 4 8 4 NC
Greenville-Spartanburg-Anderson, SC 0.087 0.114 Subpart 1 EAC     799 0 3 4 SC
Hickory-Morganton-Lenoir, NC 0.088 0.105 Subpart 1 EAC     309 0 4 4 NC
Johnson City-Kingsport-Bristol, TN 0.086 0.110 Subpart 1 EAC     206 0 2 4 TN
Nashville, TN 0.086 0.107 Subpart 1 EAC     1,097 5 5 4 TN
Roanoke, VA 0.085 0.107 Subpart 1 EAC     235 0 4 3 VA
San Antonio, TX 0.089 0.119 Subpart 1 EAC     1,559 0 3 6 TX
Washington Co (Hagerstown), MD 0.086 0.109 Subpart 1 EAC     131 0 1 3 MD
 
14 Total Areas 9,809 16 49  
 

* 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 ( 72 FR 53952).

The 1-hour ozone standard, as well as designations and classifications for all 1-hour ozone nonattainment and maintenance areas, have been revoked except for the Greensboro, NC, Nashville, TN, and Denver, CO maintenance areas. See details here.


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