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Adjustments to Original 8-Hour Ozone (2008) Nonattainment Area Baseline
Adjustments to Original 8-Hour Ozone (2008) Nonattainment Area Baseline
Data is current as of April 30, 2020Effective October 15, 2019, the initial designation of the SO2 (2010) Williamson County, IL nonattainment area was changed from nonattainment to attainment/unclassifiable (84 FR 48286).
| AREA SPLIT |
| July 15, 2019, Effective July 15, 2019 ( 84 FR 33699 ) |
| Inland Sheboygan County, WI - WISCONSIN |
| July 15, 2019, Effective July 15, 2019 ( 84 FR 33699 ) |
| Shoreline Sheboygan County, WI - WISCONSIN |
| CHANGE TO A HIGHER CLASSIFICATION (BUMP-UPS) |
| May 04, 2016, Effective June 03, 2016 ( 81 FR 26697 ) |
| Atlanta, GA - GEORGIA |
| May 04, 2016, Effective June 03, 2016 ( 81 FR 26697 ) |
| Chicago-Naperville, IL-IN-WI - ILLINOIS |
| May 04, 2016, Effective June 03, 2016 ( 81 FR 26697 ) |
| Chicago-Naperville, IL-IN-WI - INDIANA |
| May 04, 2016, Effective June 03, 2016 ( 81 FR 26697 ) |
| Chicago-Naperville, IL-IN-WI - WISCONSIN |
| May 04, 2016, Effective June 03, 2016 ( 81 FR 26697 ) |
| Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - COLORADO |
| May 04, 2016, Effective June 03, 2016 ( 81 FR 26697 ) |
| Greater Connecticut, CT - CONNECTICUT |
| May 04, 2016, Effective June 03, 2016 ( 81 FR 26697 ) |
| Imperial County, CA - CALIFORNIA |
| May 04, 2016, Effective June 03, 2016 ( 81 FR 26697 ) |
| Kern Co (Eastern Kern), CA - CALIFORNIA |
| May 04, 2016, Effective June 03, 2016 ( 81 FR 26697 ) |
| Mariposa County, CA - CALIFORNIA |
| May 04, 2016, Effective June 03, 2016 ( 81 FR 26697 ) |
| Nevada Co. (Western part), CA - CALIFORNIA |
| May 04, 2016, Effective June 03, 2016 ( 81 FR 26697 ) |
| New York-N. New Jersey-Long Island, NY-NJ-CT - CONNECTICUT |
| May 04, 2016, Effective June 03, 2016 ( 81 FR 26697 ) |
| New York-N. New Jersey-Long Island, NY-NJ-CT - NEW JERSEY |
| May 04, 2016, Effective June 03, 2016 ( 81 FR 26697 ) |
| New York-N. New Jersey-Long Island, NY-NJ-CT - NEW YORK |
| May 04, 2016, Effective June 03, 2016 ( 81 FR 26697 ) |
| Phoenix-Mesa, AZ - ARIZONA |
| May 04, 2016, Effective June 03, 2016 ( 81 FR 26697 ) |
| San Diego County, CA - CALIFORNIA |
| December 14, 2016, Effective December 14, 2016 ( 81 FR 90207 ) |
| Houston-Galveston-Brazoria, TX - TEXAS |
| December 19, 2016, Effective December 19, 2016 ( 81 FR 91841 ) |
| Inland Sheboygan County, WI - WISCONSIN |
| December 19, 2016, Effective December 19, 2016 ( 81 FR 91841 ) |
| Shoreline Sheboygan County, WI - WISCONSIN |
| July 05, 2018, Effective August 06, 2018 ( 83 FR 31334 ) |
| Kern Co (Eastern Kern), CA - CALIFORNIA |
| August 23, 2019, Effective September 23, 2019 ( 84 FR 44238 ) |
| Chicago-Naperville, IL-IN-WI - ILLINOIS |
| August 23, 2019, Effective September 23, 2019 ( 84 FR 44238 ) |
| Chicago-Naperville, IL-IN-WI - INDIANA |
| August 23, 2019, Effective September 23, 2019 ( 84 FR 44238 ) |
| Chicago-Naperville, IL-IN-WI - WISCONSIN |
| August 23, 2019, Effective September 23, 2019 ( 84 FR 44238 ) |
| Dallas-Fort Worth, TX - TEXAS |
| August 23, 2019, Effective September 23, 2019 ( 84 FR 44238 ) |
| Greater Connecticut, CT - CONNECTICUT |
| August 23, 2019, Effective September 23, 2019 ( 84 FR 44238 ) |
| Houston-Galveston-Brazoria, TX - TEXAS |
| August 23, 2019, Effective September 23, 2019 ( 84 FR 44238 ) |
| Nevada Co. (Western part), CA - CALIFORNIA |
| August 23, 2019, Effective September 23, 2019 ( 84 FR 44238 ) |
| New York-N. New Jersey-Long Island, NY-NJ-CT - CONNECTICUT |
| August 23, 2019, Effective September 23, 2019 ( 84 FR 44238 ) |
| New York-N. New Jersey-Long Island, NY-NJ-CT - NEW JERSEY |
| August 23, 2019, Effective September 23, 2019 ( 84 FR 44238 ) |
| New York-N. New Jersey-Long Island, NY-NJ-CT - NEW YORK |
| August 23, 2019, Effective September 23, 2019 ( 84 FR 44238 ) |
| San Diego County, CA - CALIFORNIA |
| December 26, 2019, Effective January 27, 2020 ( 84 FR 70897 ) |
| Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - COLORADO |