1-Hour Ozone (1979) Attainment Date Extensions - NAAQS Revoked

Data is current as of August 31, 2024
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EXTREME
Los Angeles-South Coast Air Basin, CA
Extension from 11/15//2010 to 12/31/2022
Proposed Approval	05/23/2014	79 FR 29712
Final Approval	09/03/2014	79 FR 52526	Effective: 10/03/2014
SEVERE-15
Atlanta, GA
Extension from 11/15/1999 to 11/15/2004. Voluntary vacatur negated extension.
Proposed Approval	12/11/2001	66 FR 63972
Final Approval	05/07/2002	67 FR 30574	Effective: 06/06/2002
Baton Rouge, LA
Extension from 11/15/1999 to 12/31/2001
Proposed Approval	05/09/2001	66 FR 23646
Proposed Approval	07/25/2001	66 FR 38608
Extension from 11/15/1999 to 11/15/2005
Proposed Approval	08/02/2002	67 FR 50391
Final Approval	10/02/2002	67 FR 61786	Effective: 10/02/2002
Withdrawal	04/24/2003	68 FR 20077	Effective: 06/23/2003
Washington, DC-MD-VA
Extension from 11/15/1999 to 11/15/2005. Court-order negated extension.
Proposed Approval	12/16/1999	64 FR 70460
Final Approval	01/03/2001	66 FR 585	Effective: 02/02/2001
SERIOUS
Beaumont-Port Arthur, TX
Extension from 11/15/1996 to 11/15/2007. Court-Order negated extension
Proposed Approval	12/27/2000	65 FR 81786
Final Approval	05/15/2001	66 FR 26913	Effective: 06/14/2001
Withdrawal	06/19/2003	68 FR 36756
Withdrawal	03/30/2004	69 FR 16483	Effective: 04/29/2004
Boston-Lawrence-Worcester (E. Mass), MA-NH
Extension from 11/15/1999 to 11/15/2007 (MA portion)
Proposed Approval	10/15/2002	67 FR 63586
Extension from 11/15/1999 to 11/15/2007 (NH portion)
Proposed Approval	10/21/2002	67 FR 64582
Final Approval	12/06/2002	67 FR 72574	Effective: 01/06/2003
Extension from 11/15/1999 to 11/15/2007 (MA portion)
Final Approval	12/06/2002	67 FR 72576	Effective: 01/06/2003
Dallas-Fort Worth, TX
Extension from 11/15/1999 to 11/15/2007
Proposed Approval	01/18/2001	66 FR 4756
East Kern County, CA
Extension from 11/15/1999 to 11/15/2001
Proposed Approval	05/18/2001	66 FR 27616
Final Approval	11/08/2001	66 FR 56476	Effective: 12/10/2001
Greater Connecticut, CT
Extension from 11/15/1999 to 11/15/2007
Proposed Approval	12/16/1999	64 FR 70332
Final Approval	01/03/2001	66 FR 633	Effective: 02/02/2001
Providence (all of RI), RI
Extension from 11/15/1999 to 11/15/2007
Proposed Approval	02/14/2003	68 FR 7476
Final Approval	04/07/2003	68 FR 16721	Effective: 05/07/2003
San Diego, CA
Extension from 11/15/1999 to 11/15/2000
Proposed Approval	10/11/2000	65 FR 60386
Direct Final	10/11/2000	65 FR 60362	Effective: 12/11/2000
Extension from 11/15/2000 to 11/15/2001
Proposed Approval	08/06/2001	66 FR 40953
Direct Final	08/06/2001	66 FR 40908	Effective: 10/05/2001
Springfield (Western MA), MA
Extension from 11/15/1999 to 11/15/2003
Proposed Approval	12/16/1999	64 FR 70319
Final Approval	01/03/2001	66 FR 665	Effective: 02/02/2001
St. Louis, MO-IL
Extension from 11/15/1996 to 11/15/2004. Court-Order negated extension
Proposed Approval	04/03/2001	66 FR 17647
Final Approval	06/26/2001	66 FR 33995	Effective: 06/26/2001
MODERATE
Cincinnati-Hamilton, OH-KY
Extension from 11/15/1996 to 11/15/1997
Proposed Approval	05/27/1997	62 FR 28650
Direct Final	05/27/1997	62 FR 28634	Effective: 07/28/1997
Withdrawal	07/28/1997	62 FR 40280	Effective: 07/28/1997
Final Approval	11/17/1997	62 FR 61241	Effective: 12/17/1997
Extension from 11/15/1997 to 11/15/1998
Proposed Approval	03/26/1998	63 FR 14673
Direct Final	03/26/1998	63 FR 14623	Effective: 05/26/1998
Louisville, KY-IN
Extension from 11/15/1996 to 11/15/1997
Proposed Approval	10/23/1997	62 FR 55203
Direct Final	10/23/1997	62 FR 55173	Effective: 12/22/1997
Pittsburgh-Beaver Valley, PA
Extension from 11/15/1996 to 11/15/1997
Proposed Approval	02/25/1997	62 FR 8414
Direct Final	02/25/1997	62 FR 8389	Effective: 04/11/1997
Portland, ME
Extension from 11/15/1996 to 11/15/1997
Proposed Approval	04/16/1997	62 FR 18557
Direct Final	04/16/1997	62 FR 18526	Effective: 06/02/1997
MARGINAL
Hancock County and Waldo County, ME
Extension from 11/15/1993 to 11/15/1994
Proposed Approval	02/22/1995	60 FR 9813
Final Approval	06/28/1995	60 FR 33351	Effective: 07/28/1995

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