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Ozone (2008) NAAQS Nonattainment Areas with Prior Ozone NAAQS - Updated for Actions Since April 6, 2015

Data is current as of 07/31/2019    |    See: Original April 6, 2015 List
The 1997 Ozone NAAQS was revoked effective April 6, 2015. The 1979 1-Hour Ozone NAAQS was revoked on June 15, 2005.
  8-Hour Ozone (2008) 8-Hour Ozone (1997) 1-Hour Ozone (1979)
2008 Nonattainment Area Name Classification Attainment Determination Classification Attainment
Determination
Classification Attainment Determination
Baltimore Area, MD Moderate Clean Data Determination Serious Clean Data Determination Severe-15 Clean Data Determination
Calaveras County, CA 1 Marginal Attainment Deadline Determination Moderate Clean Data Determination,Attainment Deadline Determination n/a n/a
Chico Area, CA Marginal Attainment Deadline Determination Marginal Clean Data Determination, Attainment Deadline Determination n/a n/a
Dallas-Fort Worth Area, TX 1 Moderate No Action Serious Redesignation Substitute 8 Serious Redesignation Substitute 9
Denver-Boulder-Greeley-Ft. Collins-Loveland Area, CO Moderate No Action Marginal No Action n/a n/a
Dukes County, MA 1 Marginal Attainment Deadline Determination Moderate Clean Data Determination, Attainment Deadline Determination Serious Clean Data Determination, Attainment Deadline Determination
Greater Connecticut Area, CT Moderate No Action Moderate Clean Data Determination, Attainment Deadline Determination Serious Clean Data Determination
Houston-Galveston-Brazoria Area, TX Moderate No Action Severe-15 Redesignation Substitute 7 Severe-17 Redesignation Substitute 6
Imperial County Area, CA Moderate No Action Moderate Clean Data Determination n/a n/a
Jamestown Area, NY Marginal Attainment Deadline Determination Moderate Clean Data Determination 2 n/a n/a
Kern County (Eastern Kern) Area, CA Serious No Action Moderate Clean Data Determination, Attainment Deadline Determination n/a n/a
Los Angeles and San Bernardino Counties (W Mojave Desert) Area, CA Severe-15 No Action Severe-15 No Action Severe-17 No Action
Los Angeles-South Coast Air Basin Area, CA Extreme No Action Extreme No Action Extreme  No Action
Mariposa County, CA 1 Moderate Clean Data Determination Moderate Clean Data Determination, Attainment Deadline Determination n/a n/a
Morongo Areas of Indian Country (Morongo Band of Mission Indians) 3

Serious No Action Severe-17 No Action Severe-17 No Action
Nevada County (Western part) Area, CA Moderate No Action Moderate Clean Data Determination, Attainment Deadline Determination n/a n/a
New York-N. New Jersey-Long Island Area, NY-NJ-CT Moderate No Action Moderate Attainment Deadline Determination Severe-17 Clean Data Determination
Pechanga Areas of Indian Country (Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation)4 Moderate No Action Severe-17 No Action Extreme No Action
Philadelphia-Wilmington-Atlantic City Area, PA-NJ-MD-DE 1 Marginal No Action Moderate Clean Data Determination, Attainment Deadline Determination Severe-15 Attainment Deadline Determination
Pittsburgh-Beaver Valley Area, PA Marginal No Action Moderate Clean Data Determination, Attainment Deadline Determination n/a n/a
Riverside County (Coachella Valley) Area (1-hr Southeast Desert), CA Severe-15 No Action Severe-15 No Action Severe-17 No Action
Sacramento Metro Area, CA Severe-15 No Action Severe-15 No Action Severe-15 Clean Data Determination
San Francisco Bay Area, CA Marginal Attainment Deadline Determination Marginal No Action Other Clean Data Determination, Attainment Deadline Determination
San Joaquin Valley Area, CA Extreme No Action Extreme No Action Extreme Clean Data Determination
Seaford, DE 5 Marginal Attainment Deadline Determination Moderate Clean Data Determination, Attainment Deadline Determination Marginal Clean Data Determination, Attainment Deadline Determination
Sheboygan County, WI Moderate No Action Moderate Clean Data Determination n/a n/a
Ventura County (part) Area, CA Serious No Action Serious Clean Data Determination Severe-15 Clean Data Determination, Attainment Deadline Determination
Washington Area, DC-MD-VA Marginal No Action Moderate Clean Data Determination, Attainment Deadline Determination Severe-15 Attainment Deadline Determination

1 8-Hour Ozone (2008) NAAQS nonattainment area boundary differs from 8-Hour Ozone (1997) and (where applicable) 1-Hour Ozone (1997) NAAQS nonattainment area boundary.

2 Former subpart 1 areas with Determinations of Attainment prior to subpart 2 classification on May 14, 2012 (77 FR 28424). An Attainment Deadline Determination for these areas for the 8-Hour Ozone (1997) NAAQS attainment dates is pending with the EPA.

3 Part of Los Angeles-South Coast Air Basin Area, CA (South Coast) for 8-Hour Ozone (1997) and 1-Hour Ozone (1979) nonattainment area boundaries. The EPA published a correction of the classification for the 8-Hour Ozone (1997) and 1-Hour Ozone (1979) NAAQS on September 23, 2013 (78 FR 58189).

4 Part of Los Angeles-South Coast Air Basin Area, CA (South Coast) for 8-Hour Ozone (1997) and 1-Hour Ozone (1979) nonattainment area boundaries. The EPA published a correction of the classification for the 8-Hour Ozone (1997) NAAQS on May 5, 2010 (75 FR 24409).

5 Part of the Philadelphia-Wilmington-Atlantic City Area, PA, NJ, MD, DE for 8-Hour Ozone (1997) nonattainment area boundary, and part of the Sussex County, DE Ozone nonattainment area boundary for the 1-Hour Ozone (1979) NAAQS.

6 On August 18, 2015 in 80 FR 49970, the EPA proposed approving a redesignation substitute demonstration that the Houston-Galveston-Brazoria 1-Hour Ozone (1979) nonattainment area had attained the revoked 1-Hour Ozone (1979) NAAQS due to permanent and enforceable emission reductions, and that it will maintain that NAAQS for ten years from the date of the EPA's approval of this demonstration. On October 20, 2015 in 80 FR 63429, the EPA approved the redesignation substitute demonstration effective November 19, 2015.

7 On May 25, 2016 in 81 FR 33166, the EPA proposed approving a redesignation substitute demonstration that the Houston-Galveston-Brazoria 1997 Ozone nonattainment area had attained the revoked 8-Hour Ozone (1997) NAAQS due to permanent and enforceable emission reductions, and that it will maintain that NAAQS for ten years from the date of the EPA's approval of this demonstration. On November 8, 2016 in 81 FR 78691, the EPA approved the redesignation substitute demonstration effective December 8, 2016.

8 On May 25, 2016 in 81 FR 33161, the EPA proposed approving a redesignation substitute demonstration that the Dallas-Fort Worth 8-Hour Ozone (1997) nonattainment area had attained the revoked 8-Hour Ozone (1997) NAAQS due to permanent and enforceable emission reductions, and that it will maintain that NAAQS for ten years from the date of the EPA's approval of this demonstration. On November 8, 2016 in 81 FR 78688, the EPA approved the redesignation substitute demonstration effective December 8, 2016.

9 On May 25, 2016 in 81 FR 33161, the EPA proposed approving a redesignation substitute demonstration that the Dallas-Fort Worth 1-Hour Ozone (1979) nonattainment area had attained the revoked 1-Hour Ozone (1979) NAAQS due to permanent and enforceable emission reductions, and that it will maintain that NAAQS for ten years from the date of the EPA's approval of this demonstration. On November 8, 2016 in 81 FR 78688, the EPA approved the redesignation substitute demonstration effective December 8, 2016.


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