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

Data is current as of September 30, 2020
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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 Co, 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 & Waldo Cos, 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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