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Adjustments to Original 1-Hour Ozone (1979) Nonattainment Area Baseline
Adjustments to Original 1-Hour Ozone (1979) Nonattainment Area Baseline
Data is current as of March 31, 2024| AREA SPLIT |
| November 08, 2001, Effective December 10, 2001 ( 66 FR 56476 ) |
| East Kern County, CA - CALIFORNIA |
| Kern Co |
| November 08, 2001, Effective December 10, 2001 ( 66 FR 56476 ) |
| San Joaquin Valley, CA - CALIFORNIA |
| Fresno Co, Kern Co, Kings Co, Madera Co, Merced Co, San Joaquin Co, Stanislaus Co, Tulare Co |
| September 23, 2013, Effective October 23, 2013 ( 78 FR 58189 ) |
| Morongo Band of Mission Indians, CA - CALIFORNIA |
| September 23, 2013, Effective October 23, 2013 ( 78 FR 58189 ) |
| Southeast Desert Modified AQMA, CA - CALIFORNIA |
| BOUNDARY CHANGE |
| November 30, 1992, Effective December 30, 1992 ( 57 FR 56762 ) |
| New York-N. New Jersey-Long Island, NY-NJ-CT - NEW YORK |
| Orange and Putnam Counties: The November 6, 1991 notice indicated that the State requested time to study the boundaries and classification for these two counties and that EPA would evaluate the State study. Both counties are in the New York City CMSA. The following action was taken in the November 30, 1992 notice: o Putnam County was placed in the Poughkeepsie Nonattainment Area (Marginal). o The portions of Orange County that remain with the New York nonattainment area (classified Severe-17) are: Blooming Grove, Chester, Highlands, Monroe, Tuxedo, Warwick, and Woodbury. o The remaining portions of Orange County (16 towns and cities) are designated as attainment. See April 21, 1994 notice. |
| November 30, 1992, Effective December 30, 1992 ( 57 FR 56762 ) |
| Salem, OR - OREGON |
| Boundary Change from City of Salem to Salem Area Transportation Study |
| November 30, 1992, Effective December 30, 1992 ( 57 FR 56762 ) |
| Seattle-Tacoma, WA - WASHINGTON |
| Boundary Change (small reduction) |
| April 21, 1994, Effective April 21, 1994 ( 59 FR 18967 ) |
| Poughkeepsie, NY - NEW YORK |
| (Marginal) See October 6, 1994 Notice Below Orange County: Remainder of county (16 towns and cities) joined to Poughkeepsie. |
| October 23, 1995, Effective November 20, 1995 ( 60 FR 54310 ) |
| Richmond, VA - VIRGINIA |
| Boundary Change excluding all of Charles City County west of Route 156. The boundaries for the Charles City County portion of the Richmond nonattainment area include the area surrounding the air quality monitor and the urbanized portion of the county that is contiguous with the rest of the Richmond nonattainment area. |
| October 07, 2003, Effective November 06, 2003 ( 68 FR 57820 ) |
| Los Angeles-South Coast Air Basin, CA - CALIFORNIA |
| October 07, 2003, Effective November 06, 2003 ( 68 FR 57820 ) |
| Southeast Desert Modified AQMA, CA - CALIFORNIA |
| CHANGE TO A LOWER CLASSIFICATION |
| November 30, 1992, Effective December 30, 1992 ( 57 FR 56762 ) |
| Muskegon, MI - MICHIGAN |
| Reclassified from Serious to Moderate |
| November 30, 1992, Effective December 30, 1992 ( 57 FR 56762 ) |
| Sheboygan, WI - WISCONSIN |
| Reclassified from Serious to Moderate |
| January 19, 1995, Effective February 21, 1995 ( 60 FR 3771 ) |
| San Diego, CA - CALIFORNIA |
| Reclassified from Severe to Serious |
| April 02, 1996, Effective June 03, 1996 ( 61 FR 14496 ) |
| Beaumont-Port Arthur, TX - TEXAS |
| Reclassified from Serious to Moderate |
| January 06, 1997, Effective December 20, 1996 ( 62 FR 648 ) |
| Pointe Coupee Parish, LA - LOUISIANA |
| Reclassify from Serious to Marginal |
| CHANGE TO A HIGHER CLASSIFICATION (BUMP-UPS) |
| October 06, 1994, Effective November 07, 1994 ( 59 FR 50848 ) |
| Poughkeepsie, NY - NEW YORK |
| Reclassify from Marginal to Moderate |
| April 25, 1995, Effective June 01, 1995 ( 60 FR 20237 ) |
| Sacramento Metro, CA - CALIFORNIA |
| Reclassify from Serious to Severe 2005 |
| November 06, 1997, Effective December 08, 1997 ( 62 FR 60001 ) |
| Phoenix, AZ - ARIZONA |
| Reclassify from Moderate to Serious |
| December 10, 1997, Effective January 09, 1998 ( 62 FR 65025 ) |
| Santa Barbara-Santa Maria-Lompoc, CA - CALIFORNIA |
| Reclassify from Moderate to Serious |
| February 18, 1998, Effective March 20, 1998 ( 63 FR 8128 ) |
| Dallas-Fort Worth, TX - TEXAS |
| Reclassify from Moderate to Serious |
| November 08, 2001, Effective December 10, 2001 ( 66 FR 56476 ) |
| San Joaquin Valley, CA - CALIFORNIA |
| Reclassify from Serious to Severe 2005 |
| January 24, 2003, Effective March 25, 2003 ( 68 FR 3410 ) |
| Washington, DC-MD-VA - DISTRICT OF COLUMBIA |
| Reclassify from Serious to Severe 2005 |
| January 24, 2003, Effective March 25, 2003 ( 68 FR 3410 ) |
| Washington, DC-MD-VA - MARYLAND |
| Reclassify from Serious to Severe 2005 |
| January 24, 2003, Effective March 25, 2003 ( 68 FR 3410 ) |
| Washington, DC-MD-VA - VIRGINIA |
| Reclassify from Serious to Severe 2005 |
| January 30, 2003, Effective January 30, 2003 ( 68 FR 4835 ) |
| St. Louis, MO-IL - ILLINOIS |
| Reclassify from Moderate to Serious |
| January 30, 2003, Effective January 30, 2003 ( 68 FR 4835 ) |
| St. Louis, MO-IL - MISSOURI |
| Reclassify from Moderate to Serious |
| April 24, 2003, Effective June 23, 2003 ( 68 FR 20077 ) |
| Baton Rouge, LA - LOUISIANA |
| Reclassify from Serious to Severe |
| September 26, 2003, Effective January 01, 2004 ( 68 FR 55469 ) |
| Atlanta, GA - GEORGIA |
| Reclassify from Serious to Severe |
| March 30, 2004, Effective April 29, 2004 ( 69 FR 16483 ) |
| Beaumont-Port Arthur, TX - TEXAS |
| Reclassify from Moderate to Serious |
| April 16, 2004, Effective May 17, 2004 ( 69 FR 20550 ) |
| San Joaquin Valley, CA - CALIFORNIA |
| Reclassify from Severe 2005 to Extreme |
| DESIGNATION TO NONATTAINMENT |
| June 12, 1995, Effective July 12, 1995 ( 60 FR 30789 ) |
| Dona Ana County (part); Sunland Park, NM - NEW MEXICO |
| Dona Ana County (part) Classified as Marginal |
| July 10, 1998, Effective August 10, 1998 ( 63 FR 37258 ) |
| San Francisco-Bay Area, CA - CALIFORNIA |
| Alameda Co, Contra Costa Co, Marin Co, Napa Co, San Francisco Co, San Mateo Co, Santa Clara Co, Solano Co, Sonoma Co |