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Federal Register Notices Related to PM-10 (1987) Designations and Classifications
Federal Register Notices Related to PM-10 (1987) Designations and Classifications
Data is current as of March 31, 2021Ordered Chronologically in Descending Order
Click on the 'FR' link to view the Federal Register Notice
Last Notice
| 09/18/2020 | Imperial Valley, CA | CALIFORNIA | 85 FR 58286 | Final Approval | Redesignation to Maintenance |
| 08/04/2020 | Ajo (Pima County), AZ | ARIZONA | 85 FR 47032 | Final Approval | Redesignation to Maintenance |
| 06/26/2020 | Columbia Falls, MT | MONTANA | 85 FR 38327 | Final Approval | Redesignation to Maintenance |
| 06/26/2020 | Kalispell, MT | MONTANA | 85 FR 38327 | Final Approval | Redesignation to Maintenance |
| 06/26/2020 | Libby, MT | MONTANA | 85 FR 38327 | Final Approval | Redesignation to Maintenance |
| 06/24/2020 | West Pinal, AZ | ARIZONA | 85 FR 37756 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 06/24/2020 | West Pinal, AZ | ARIZONA | 85 FR 37756 | Final Approval | Failure to Attain by Attainment Date |
| 06/04/2020 | Ajo (Pima County), AZ | ARIZONA | 85 FR 34381 | Proposed Approval | Redesignation to Maintenance |
| 04/07/2020 | West Pinal, AZ | ARIZONA | 85 FR 19408 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/07/2020 | West Pinal, AZ | ARIZONA | 85 FR 19408 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/02/2020 | Imperial Valley, CA | CALIFORNIA | 85 FR 18509 | Proposed Approval | Redesignation to Maintenance |
| 03/20/2020 | Columbia Falls, MT | MONTANA | 85 FR 16029 | Proposed Approval | Redesignation to Maintenance |
| 03/20/2020 | Kalispell, MT | MONTANA | 85 FR 16029 | Proposed Approval | Redesignation to Maintenance |
| 03/20/2020 | Libby, MT | MONTANA | 85 FR 16029 | Proposed Approval | Redesignation to Maintenance |
| 02/25/2020 | Ogden, UT | UTAH | 85 FR 10989 | Final Approval | Redesignation to Maintenance |
| 02/25/2020 | Salt Lake Co, UT | UTAH | 85 FR 10989 | Final Approval | Redesignation to Maintenance |
| 02/25/2020 | Utah Co, UT | UTAH | 85 FR 10989 | Final Approval | Redesignation to Maintenance |
| 11/21/2019 | Ogden, UT | UTAH | 84 FR 64245 | Proposed Approval | Redesignation to Maintenance |
| 11/21/2019 | Salt Lake Co, UT | UTAH | 84 FR 64245 | Proposed Approval | Redesignation to Maintenance |
| 11/21/2019 | Utah Co, UT | UTAH | 84 FR 64245 | Proposed Approval | Redesignation to Maintenance |
| 05/24/2019 | Missoula, MT | MONTANA | 84 FR 24037 | Final Approval | Redesignation to Maintenance |
| 03/05/2019 | Missoula, MT | MONTANA | 84 FR 7846 | Proposed Approval | Redesignation to Maintenance |
| 09/11/2018 | Pinehurst, ID | IDAHO | 83 FR 45830 | Final Approval | Redesignation to Maintenance |
| 09/11/2018 | Shoshone Co, ID | IDAHO | 83 FR 45830 | Final Approval | Redesignation to Maintenance |
| 05/11/2018 | Pinehurst, ID | IDAHO | 83 FR 21976 | Proposed Approval | Redesignation to Maintenance |
| 05/11/2018 | Shoshone Co, ID | IDAHO | 83 FR 21976 | Proposed Approval | Redesignation to Maintenance |
| 04/04/2018 | Sheridan, WY | WYOMING | 83 FR 14373 | Final Approval | Redesignation to Maintenance |
| 01/29/2018 | Sheridan, WY | WYOMING | 83 FR 4015 | Proposed Approval | Redesignation to Maintenance |
| 12/08/2015 | Washoe Co, NV | NEVADA | 80 FR 76232 | Final Approval | Redesignation to Maintenance |
| 10/05/2015 | Mammoth Lake, CA | CALIFORNIA | 80 FR 60049 | Final Approval | Redesignation to Maintenance |
| 09/30/2015 | Washoe Co, NV | NEVADA | 80 FR 58640 | Proposed Approval | Redesignation to Maintenance |
| 07/30/2015 | Mammoth Lake, CA | CALIFORNIA | 80 FR 45477 | Proposed Approval | Redesignation to Maintenance |
| 07/29/2015 | New York Co, NY | NEW YORK | 80 FR 45067 | Final Approval | Correction/Clarification |
| 10/06/2014 | Clark Co, NV | NEVADA | 79 FR 60078 | Final Approval | Redesignation to Maintenance |
| 07/21/2014 | Clark Co, NV | NEVADA | 79 FR 42258 | Proposed Approval | Redesignation to Maintenance |
| 12/02/2013 | New York Co, NY | NEW YORK | 78 FR 72032 | Final Approval | Clean Data Determination/Attainment Determination |
| 09/26/2013 | Sacramento Co, CA | CALIFORNIA | 78 FR 59261 | Final Approval | Redesignation to Maintenance |
| 09/13/2013 | New York Co, NY | NEW YORK | 78 FR 56633 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 07/24/2013 | Sacramento Co, CA | CALIFORNIA | 78 FR 44494 | Proposed Approval | Redesignation to Maintenance |
| 06/26/2013 | Los Angeles South Coast Air Basin, CA | CALIFORNIA | 78 FR 38223 | Final Approval | Redesignation to Maintenance |
| 05/09/2013 | Juneau, AK | ALASKA | 78 FR 27168 | Proposed Approval | Redesignation to Maintenance |
| 05/09/2013 | Juneau, AK | ALASKA | 78 FR 27071 | Direct Final | Redesignation to Maintenance |
| 04/11/2013 | Eugene-Springfield, OR | OREGON | 78 FR 21583 | Proposed Approval | Redesignation to Maintenance |
| 04/11/2013 | Eugene-Springfield, OR | OREGON | 78 FR 21547 | Direct Final | Redesignation to Maintenance |
| 04/08/2013 | Los Angeles South Coast Air Basin, CA | CALIFORNIA | 78 FR 20868 | Proposed Approval | Redesignation to Maintenance |
| 04/03/2013 | Bonner Co (Sandpoint), ID | IDAHO | 78 FR 20001 | Final Approval | Redesignation to Maintenance |
| 03/19/2013 | Imperial Valley, CA | CALIFORNIA | 78 FR 16827 | Proposed Approval | Correction/Clarification |
| 03/19/2013 | Imperial Valley, CA | CALIFORNIA | 78 FR 16792 | Direct Final | Correction/Clarification |
| 02/01/2013 | Bonner Co (Sandpoint), ID | IDAHO | 78 FR 7340 | Proposed Approval | Redesignation to Maintenance |
| 01/07/2013 | Eagle River, AK | ALASKA | 78 FR 924 | Proposed Approval | Redesignation to Maintenance |
| 01/07/2013 | Eagle River, AK | ALASKA | 78 FR 900 | Direct Final | Redesignation to Maintenance |
| 01/07/2013 | Ogden, UT | UTAH | 78 FR 885 | Final Approval | Clean Data Determination/Attainment Determination |
| 08/02/2012 | Paul Spur/Douglas (Cochise County), AZ | ARIZONA | 77 FR 45965 | Final Approval | Clean Data Determination/Attainment Determination |
| 07/30/2012 | Ogden, UT | UTAH | 77 FR 44544 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 05/31/2012 | West Pinal, AZ | ARIZONA | 77 FR 32024 | Final Approval | Designation to Nonattainment |
| 05/25/2012 | Paul Spur/Douglas (Cochise County), AZ | ARIZONA | 77 FR 31268 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/19/2011 | Washoe Co, NV | NEVADA | 76 FR 21807 | Direct Final | Clean Data Determination/Attainment Determination |
| 03/21/2011 | East Kern Co, CA | CALIFORNIA | 76 FR 15219 | Final Approval | Technical Amendment |
| 03/21/2011 | San Joaquin Valley Air Basin, CA | CALIFORNIA | 76 FR 15219 | Final Approval | Technical Amendment |
| 02/28/2011 | Washoe Co, NV | NEVADA | 76 FR 10817 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 01/31/2011 | Columbia Falls, MT | MONTANA | 76 FR 5323 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 01/31/2011 | Columbia Falls, MT | MONTANA | 76 FR 5280 | Direct Final | Clean Data Determination/Attainment Determination |
| 01/31/2011 | Libby, MT | MONTANA | 76 FR 5323 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 01/31/2011 | Libby, MT | MONTANA | 76 FR 5280 | Direct Final | Clean Data Determination/Attainment Determination |
| 01/11/2011 | Hayden, AZ | ARIZONA | 76 FR 1532 | Final Approval | Clean Data Determination/Attainment Determination |
| 01/11/2011 | Nogales, AZ | ARIZONA | 76 FR 1532 | Final Approval | Clean Data Determination/Attainment Determination |
| 01/11/2011 | Paul Spur/Douglas (Cochise County), AZ | ARIZONA | 76 FR 1532 | Final Approval | Clean Data Determination/Attainment Determination |
| 11/29/2010 | Hayden, AZ | ARIZONA | 75 FR 72964 | Withdrawal | Clean Data Determination/Attainment Determination |
| 11/29/2010 | Nogales, AZ | ARIZONA | 75 FR 72964 | Withdrawal | Clean Data Determination/Attainment Determination |
| 11/29/2010 | Paul Spur/Douglas (Cochise County), AZ | ARIZONA | 75 FR 72964 | Withdrawal | Clean Data Determination/Attainment Determination |
| 11/02/2010 | Hayden, AZ | ARIZONA | 75 FR 67303 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 11/02/2010 | Hayden, AZ | ARIZONA | 75 FR 67220 | Direct Final | Clean Data Determination/Attainment Determination |
| 11/02/2010 | Nogales, AZ | ARIZONA | 75 FR 67303 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 11/02/2010 | Nogales, AZ | ARIZONA | 75 FR 67220 | Direct Final | Clean Data Determination/Attainment Determination |
| 11/02/2010 | Paul Spur/Douglas (Cochise County), AZ | ARIZONA | 75 FR 67303 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 11/02/2010 | Paul Spur/Douglas (Cochise County), AZ | ARIZONA | 75 FR 67220 | Direct Final | Clean Data Determination/Attainment Determination |
| 10/19/2010 | Eagle River, AK | ALASKA | 75 FR 64241 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 10/19/2010 | Eagle River, AK | ALASKA | 75 FR 64162 | Direct Final | Clean Data Determination/Attainment Determination |
| 10/01/2010 | West Pinal, AZ | ARIZONA | 75 FR 60680 | Proposed Approval | Designation to Nonattainment |
| 09/03/2010 | Coso Junction, CA | CALIFORNIA | 75 FR 54031 | Final Approval | Redesignation to Maintenance |
| 08/03/2010 | Clark Co, NV | NEVADA | 75 FR 45571 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/03/2010 | Clark Co, NV | NEVADA | 75 FR 45485 | Direct Final | Clean Data Determination/Attainment Determination |
| 07/28/2010 | Fort Hall Indian Reservation | IDAHO | 75 FR 44142 | Final Approval | Clean Data Determination/Attainment Determination |
| 07/16/2010 | Juneau, AK | ALASKA | 75 FR 41421 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 07/16/2010 | Juneau, AK | ALASKA | 75 FR 41379 | Direct Final | Clean Data Determination/Attainment Determination |
| 06/24/2010 | Coso Junction, CA | CALIFORNIA | 75 FR 36023 | Proposed Approval | Redesignation to Maintenance |
| 06/22/2010 | Bonner Co (Sandpoint), ID | IDAHO | 75 FR 35362 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 06/22/2010 | Bonner Co (Sandpoint), ID | IDAHO | 75 FR 35302 | Direct Final | Clean Data Determination/Attainment Determination |
| 05/19/2010 | Coso Junction, CA | CALIFORNIA | 75 FR 27944 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/13/2010 | Fort Hall Indian Reservation | IDAHO | 75 FR 26898 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 03/23/2010 | Coso Junction, CA | CALIFORNIA | 75 FR 13710 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 01/12/2010 | Mun. of Guaynabo, PR | PUERTO RICO | 75 FR 1543 | Final Approval | Redesignation to Maintenance |
| 12/30/2009 | Ogden, UT | UTAH | 74 FR 69049 | Proposed Disapproval | Extension of Comment Period |
| 12/01/2009 | Ogden, UT | UTAH | 74 FR 62717 | Proposed Disapproval | Redesignation to Maintenance |
| 12/01/2009 | Salt Lake Co, UT | UTAH | 74 FR 62717 | Proposed Disapproval | Redesignation to Maintenance |
| 09/02/2009 | Mun. of Guaynabo, PR | PUERTO RICO | 74 FR 45387 | Proposed Approval | Redesignation to Maintenance |
| 11/12/2008 | East Kern Co, CA | CALIFORNIA | 73 FR 66759 | Final Approval | Area Split |
| 11/12/2008 | San Joaquin Valley Air Basin, CA | CALIFORNIA | 73 FR 66759 | Final Approval | Area Split |
| 11/12/2008 | San Joaquin Valley Air Basin, CA | CALIFORNIA | 73 FR 66759 | Final Approval | Redesignation to Maintenance |
| 08/14/2008 | Phoenix, AZ | ARIZONA | 73 FR 47542 | Final Approval | Attainment Date Extension |
| 05/23/2008 | San Joaquin Valley Air Basin, CA | CALIFORNIA | 73 FR 30029 | Proposed Approval | Extension of Comment Period |
| 04/25/2008 | San Joaquin Valley Air Basin, CA | CALIFORNIA | 73 FR 22307 | Proposed Approval | Area Split |
| 04/25/2008 | San Joaquin Valley Air Basin, CA | CALIFORNIA | 73 FR 22307 | Proposed Approval | Redesignation to Maintenance |
| 03/19/2008 | San Joaquin Valley Air Basin, CA | CALIFORNIA | 73 FR 14687 | Final Approval | Clean Data Determination/Attainment Determination |
| 12/11/2007 | Imperial Valley, CA | CALIFORNIA | 72 FR 70222 | Final Approval | Failure to Attain by Attainment Date |
| 08/27/2007 | San Joaquin Valley Air Basin, CA | CALIFORNIA | 72 FR 49045 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 06/06/2007 | Owens Valley, CA | CALIFORNIA | 72 FR 31183 | Final Approval | Failure to Attain by Attainment Date |
| 06/06/2007 | Phoenix, AZ | ARIZONA | 72 FR 31183 | Final Approval | Failure to Attain by Attainment Date |
| 03/28/2007 | Hayden, AZ | ARIZONA | 72 FR 14502 | Proposed Approval | Area Split |
| 03/28/2007 | Hayden, AZ | ARIZONA | 72 FR 14422 | Direct Final | Area Split |
| 03/28/2007 | Miami, AZ | ARIZONA | 72 FR 14502 | Proposed Approval | Area Split |
| 03/28/2007 | Miami, AZ | ARIZONA | 72 FR 14502 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 03/28/2007 | Miami, AZ | ARIZONA | 72 FR 14422 | Direct Final | Area Split |
| 03/28/2007 | Miami, AZ | ARIZONA | 72 FR 14422 | Direct Final | Clean Data Determination/Attainment Determination |
| 03/23/2007 | Owens Valley, CA | CALIFORNIA | 72 FR 13723 | Proposed Approval | Failure to Attain by Attainment Date |
| 03/23/2007 | Phoenix, AZ | ARIZONA | 72 FR 13723 | Proposed Approval | Failure to Attain by Attainment Date |
| 10/30/2006 | San Joaquin Valley Air Basin, CA | CALIFORNIA | 71 FR 63641 | Final Approval | Clean Data Determination/Attainment Determination |
| 08/08/2006 | Rillito, AZ | ARIZONA | 71 FR 44944 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/08/2006 | Rillito, AZ | ARIZONA | 71 FR 44920 | Direct Final | Clean Data Determination/Attainment Determination |
| 08/03/2006 | Phoenix, AZ | ARIZONA | 71 FR 43979 | Final Approval | Attainment Date Extension |
| 07/19/2006 | San Joaquin Valley Air Basin, CA | CALIFORNIA | 71 FR 40952 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 07/14/2006 | Weirton, WV | WEST VIRGINIA | 71 FR 40023 | Final Approval | Redesignation to Maintenance |
| 07/13/2006 | Portneuf Valley, ID | IDAHO | 71 FR 39574 | Final Approval | Redesignation to Maintenance |
| 06/19/2006 | LaGrande, OR | OREGON | 71 FR 35161 | Final Approval | Redesignation to Maintenance |
| 06/19/2006 | Lake Co, OR | OREGON | 71 FR 35159 | Final Approval | Redesignation to Maintenance |
| 06/19/2006 | Medford-Ashland, OR | OREGON | 71 FR 35233 | Proposed Approval | Redesignation to Maintenance |
| 06/19/2006 | Medford-Ashland, OR | OREGON | 71 FR 35163 | Direct Final | Redesignation to Maintenance |
| 05/18/2006 | LaGrande, OR | OREGON | 71 FR 28777 | Withdrawal | Redesignation to Maintenance |
| 05/18/2006 | Lake Co, OR | OREGON | 71 FR 28777 | Withdrawal | Redesignation to Maintenance |
| 05/11/2006 | Weirton, WV | WEST VIRGINIA | 71 FR 27440 | Proposed Approval | Redesignation to Maintenance |
| 03/22/2006 | LaGrande, OR | OREGON | 71 FR 14438 | Proposed Approval | Redesignation to Maintenance |
| 03/22/2006 | LaGrande, OR | OREGON | 71 FR 14393 | Direct Final | Redesignation to Maintenance |
| 03/22/2006 | Lake Co, OR | OREGON | 71 FR 14438 | Proposed Approval | Redesignation to Maintenance |
| 03/22/2006 | Lake Co, OR | OREGON | 71 FR 14399 | Direct Final | Redesignation to Maintenance |
| 03/14/2006 | Yuma, AZ | ARIZONA | 71 FR 13063 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 03/14/2006 | Yuma, AZ | ARIZONA | 71 FR 13021 | Direct Final | Clean Data Determination/Attainment Determination |
| 02/08/2006 | Ajo (Pima County), AZ | ARIZONA | 71 FR 6437 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 02/08/2006 | Ajo (Pima County), AZ | ARIZONA | 71 FR 6352 | Direct Final | Clean Data Determination/Attainment Determination |
| 12/06/2005 | Lamar, CO | COLORADO | 70 FR 72597 | Final Approval | Correction/Clarification |
| 10/25/2005 | Lamar, CO | COLORADO | 70 FR 61563 | Direct Final | Redesignation to Maintenance |
| 10/13/2005 | New Haven Co, CT | CONNECTICUT | 70 FR 59690 | Proposed Approval | Redesignation to Maintenance |
| 10/13/2005 | New Haven Co, CT | CONNECTICUT | 70 FR 59657 | Direct Final | Redesignation to Maintenance |
| 09/22/2005 | Lyons Twsp., IL | ILLINOIS | 70 FR 55610 | Proposed Approval | Redesignation to Maintenance |
| 09/22/2005 | Lyons Twsp., IL | ILLINOIS | 70 FR 55541 | Direct Final | Redesignation to Maintenance |
| 09/22/2005 | Southeast Chicago, IL | ILLINOIS | 70 FR 55611 | Proposed Approval | Redesignation to Maintenance |
| 09/22/2005 | Southeast Chicago, IL | ILLINOIS | 70 FR 55545 | Direct Final | Redesignation to Maintenance |
| 08/26/2005 | Wallula, WA | WASHINGTON | 70 FR 50212 | Final Approval | Redesignation to Maintenance |
| 07/01/2005 | Phoenix, AZ | ARIZONA | 70 FR 38064 | Proposed Approval | Attainment Date Extension |
| 07/01/2005 | Spokane Co, WA | WASHINGTON | 70 FR 38073 | Proposed Approval | Redesignation to Maintenance |
| 07/01/2005 | Spokane Co, WA | WASHINGTON | 70 FR 38029 | Direct Final | Redesignation to Maintenance |
| 07/01/2005 | Wallula, WA | WASHINGTON | 70 FR 38073 | Proposed Approval | Redesignation to Maintenance |
| 05/20/2005 | Portneuf Valley, ID | IDAHO | 70 FR 29243 | Proposed Approval | Redesignation to Maintenance |
| 03/10/2005 | Phoenix, AZ | ARIZONA | 70 FR 11882 | Final Approval | Boundary Change |
| 02/08/2005 | Yakima Co, WA | WASHINGTON | 70 FR 6591 | Final Approval | Redesignation to Maintenance |
| 02/07/2005 | Yakima Co, WA | WASHINGTON | 70 FR 6361 | Final Approval | Boundary Change |
| 12/20/2004 | Weirton, WV | WEST VIRGINIA | 69 FR 75847 | Withdrawal | Redesignation to Maintenance |
| 11/29/2004 | Yakima Co, WA | WASHINGTON | 69 FR 69338 | Proposed Approval | Boundary Change |
| 11/29/2004 | Yakima Co, WA | WASHINGTON | 69 FR 69342 | Proposed Approval | Redesignation to Maintenance |
| 11/09/2004 | Weirton, WV | WEST VIRGINIA | 69 FR 64860 | Direct Final | Correction/Clarification |
| 10/27/2004 | Weirton, WV | WEST VIRGINIA | 69 FR 62637 | Proposed Approval | Redesignation to Maintenance |
| 10/27/2004 | Weirton, WV | WEST VIRGINIA | 69 FR 62591 | Direct Final | Redesignation to Maintenance |
| 10/25/2004 | Steamboat Springs, CO | COLORADO | 69 FR 62210 | Final Approval | Redesignation to Maintenance |
| 10/10/2004 | Phoenix, AZ | ARIZONA | 99 FR 5953 | Court-Order | Attainment Date Extension Remanded |
| 09/20/2004 | Lamar, CO | COLORADO | 69 FR 56163 | Withdrawal | Redesignation to Maintenance |
| 09/20/2004 | Steamboat Springs, CO | COLORADO | 69 FR 56163 | Withdrawal | Redesignation to Maintenance |
| 08/20/2004 | Imperial Valley, CA | CALIFORNIA | 69 FR 51753 | Final Approval | Correction/Clarification |
| 08/11/2004 | Imperial Valley, CA | CALIFORNIA | 69 FR 48835 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/11/2004 | Imperial Valley, CA | CALIFORNIA | 69 FR 48792 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 08/05/2004 | Lamar, CO | COLORADO | 69 FR 47399 | Proposed Approval | Redesignation to Maintenance |
| 08/05/2004 | Lamar, CO | COLORADO | 69 FR 47366 | Direct Final | Redesignation to Maintenance |
| 08/05/2004 | Steamboat Springs, CO | COLORADO | 69 FR 47399 | Proposed Approval | Redesignation to Maintenance |
| 08/05/2004 | Steamboat Springs, CO | COLORADO | 69 FR 47366 | Direct Final | Redesignation to Maintenance |
| 06/09/2004 | Clark Co, NV | NEVADA | 69 FR 32273 | Final Approval | Attainment Date Extension |
| 12/18/2003 | Imperial Valley, CA | CALIFORNIA | 99 FR 17741 | Court-Order | Change to a Higher Classification (Bump-Ups) Vacated |
| 10/27/2003 | Boise-Northern Ada County, ID | IDAHO | 68 FR 61106 | Final Approval | Redesignation to Maintenance |
| 10/27/2003 | Boise-Northern Ada County, ID | IDAHO | 68 FR 61106 | Final Approval | Designation Reinstatement |
| 10/27/2003 | Grants Pass, OR | OREGON | 68 FR 61178 | Proposed Approval | Redesignation to Maintenance |
| 10/27/2003 | Grants Pass, OR | OREGON | 68 FR 61111 | Direct Final | Redesignation to Maintenance |
| 10/21/2003 | Klamath Falls, OR | OREGON | 68 FR 60060 | Proposed Approval | Redesignation to Maintenance |
| 10/21/2003 | Klamath Falls, OR | OREGON | 68 FR 60036 | Direct Final | Redesignation to Maintenance |
| 10/09/2003 | Imperial Valley, CA | CALIFORNIA | 99 FR 14995 | Court-Order | Change to a Higher Classification (Bump-Ups) Vacated |
| 10/07/2003 | Coachella Valley, CA | CALIFORNIA | 68 FR 57820 | Final Approval | Boundary Change |
| 10/07/2003 | Los Angeles South Coast Air Basin, CA | CALIFORNIA | 68 FR 57820 | Final Approval | Boundary Change |
| 09/11/2003 | Clairton & 4 Boroughs, PA | PENNSYLVANIA | 68 FR 53515 | Final Approval | Redesignation to Maintenance |
| 08/27/2003 | Follansbee, WV | WEST VIRGINIA | 68 FR 51544 | Proposed Approval | Redesignation to Maintenance |
| 08/27/2003 | Follansbee, WV | WEST VIRGINIA | 68 FR 51459 | Direct Final | Redesignation to Maintenance |
| 08/15/2003 | Coachella Valley, CA | CALIFORNIA | 68 FR 48848 | Proposed Approval | Boundary Change |
| 08/15/2003 | Los Angeles South Coast Air Basin, CA | CALIFORNIA | 68 FR 48848 | Proposed Approval | Boundary Change |
| 07/30/2003 | Boise-Northern Ada County, ID | IDAHO | 68 FR 44715 | Proposed Approval | Redesignation to Maintenance |
| 07/30/2003 | Boise-Northern Ada County, ID | IDAHO | 68 FR 44715 | Proposed Approval | Designation Reinstatement |
| 07/18/2003 | Clairton & 4 Boroughs, PA | PENNSYLVANIA | 68 FR 42657 | Proposed Approval | Redesignation to Maintenance |
| 06/23/2003 | Indian Wells, CA | CALIFORNIA | 68 FR 37090 | Final Approval | Correction/Clarification |
| 06/23/2003 | Trona, CA | CALIFORNIA | 68 FR 37090 | Final Approval | Correction/Clarification |
| 05/15/2003 | Aspen, CO | COLORADO | 68 FR 26248 | Proposed Approval | Redesignation to Maintenance |
| 05/15/2003 | Aspen, CO | COLORADO | 68 FR 26212 | Direct Final | Redesignation to Maintenance |
| 05/07/2003 | Indian Wells, CA | CALIFORNIA | 68 FR 24368 | Final Approval | Redesignation to Maintenance |
| 04/18/2003 | Coachella Valley, CA | CALIFORNIA | 68 FR 19318 | Final Approval | Attainment Date Extension |
| 04/18/2003 | Los Angeles South Coast Air Basin, CA | CALIFORNIA | 68 FR 19316 | Final Approval | Attainment Date Extension |
| 02/12/2003 | Shoshone Co, ID | IDAHO | 68 FR 7174 | Final Approval | Correction/Clarification |
| 01/22/2003 | Clark Co, NV | NEVADA | 68 FR 2954 | Proposed Approval | Attainment Date Extension |
| 01/10/2003 | East Chicago, IN | INDIANA | 68 FR 1414 | Proposed Approval | Redesignation to Maintenance |
| 01/10/2003 | East Chicago, IN | INDIANA | 68 FR 1370 | Direct Final | Redesignation to Maintenance |
| 12/17/2002 | Coachella Valley, CA | CALIFORNIA | 67 FR 77204 | Proposed Approval | Attainment Date Extension |
| 12/17/2002 | Indian Wells, CA | CALIFORNIA | 67 FR 77196 | Proposed Approval | Redesignation to Maintenance |
| 12/17/2002 | Los Angeles South Coast Air Basin, CA | CALIFORNIA | 67 FR 77212 | Proposed Approval | Attainment Date Extension |
| 09/19/2002 | Coso Junction, CA | CALIFORNIA | 67 FR 59005 | Final Approval | Correction/Clarification |
| 09/19/2002 | Indian Wells, CA | CALIFORNIA | 67 FR 59005 | Final Approval | Correction/Clarification |
| 09/19/2002 | Trona, CA | CALIFORNIA | 67 FR 59005 | Final Approval | Correction/Clarification |
| 09/16/2002 | Denver Metro, CO | COLORADO | 67 FR 58335 | Final Approval | Redesignation to Maintenance |
| 08/06/2002 | Coso Junction, CA | CALIFORNIA | 67 FR 50805 | Final Approval | Area Split |
| 08/06/2002 | Indian Wells, CA | CALIFORNIA | 67 FR 50805 | Final Approval | Area Split |
| 08/06/2002 | Trona, CA | CALIFORNIA | 67 FR 50805 | Final Approval | Area Split |
| 08/06/2002 | Trona, CA | CALIFORNIA | 67 FR 50805 | Final Approval | Clean Data Determination/Attainment Determination |
| 07/26/2002 | Ramsey Co, MN | MINNESOTA | 67 FR 48839 | Proposed Approval | Redesignation to Maintenance |
| 07/26/2002 | Ramsey Co, MN | MINNESOTA | 67 FR 48787 | Direct Final | Redesignation to Maintenance |
| 07/25/2002 | Phoenix, AZ | ARIZONA | 67 FR 48718 | Final Approval | Attainment Date Extension |
| 06/26/2002 | Mohave Co, AZ | ARIZONA | 67 FR 43073 | Proposed Approval | Redesignation to Maintenance |
| 06/26/2002 | Mohave Co, AZ | ARIZONA | 67 FR 43020 | Direct Final | Boundary Change |
| 06/26/2002 | Mohave Co, AZ | ARIZONA | 67 FR 43020 | Direct Final | Redesignation to Maintenance |
| 06/26/2002 | Payson, AZ | ARIZONA | 67 FR 43072 | Proposed Approval | Redesignation to Maintenance |
| 06/26/2002 | Payson, AZ | ARIZONA | 67 FR 43013 | Direct Final | Redesignation to Maintenance |
| 05/23/2002 | Denver Metro, CO | COLORADO | 67 FR 36124 | Proposed Approval | Redesignation to Maintenance |
| 02/15/2002 | Mohave Co, AZ | ARIZONA | 67 FR 7082 | Final Approval | Clean Data Determination/Attainment Determination |
| 02/15/2002 | Payson, AZ | ARIZONA | 67 FR 7082 | Final Approval | Clean Data Determination/Attainment Determination |
| 02/15/2002 | Sacramento Co, CA | CALIFORNIA | 67 FR 7082 | Final Approval | Clean Data Determination/Attainment Determination |
| 02/15/2002 | San Bernardino Co, CA | CALIFORNIA | 67 FR 7082 | Final Approval | Clean Data Determination/Attainment Determination |
| 10/02/2001 | Phoenix, AZ | ARIZONA | 66 FR 50251 | Proposed Approval | Attainment Date Extension |
| 08/23/2001 | Pinehurst, ID | IDAHO | 66 FR 44329 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/23/2001 | Pinehurst, ID | IDAHO | 66 FR 44304 | Direct Final | Clean Data Determination/Attainment Determination |
| 08/23/2001 | Shoshone Co, ID | IDAHO | 66 FR 44329 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/23/2001 | Shoshone Co, ID | IDAHO | 66 FR 44304 | Direct Final | Clean Data Determination/Attainment Determination |
| 08/10/2001 | Imperial Valley, CA | CALIFORNIA | 66 FR 42187 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 07/26/2001 | Lane Co, OR | OREGON | 66 FR 38947 | Direct Final | Clean Data Determination/Attainment Determination |
| 07/25/2001 | Mohave Co, AZ | ARIZONA | 66 FR 38603 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 07/25/2001 | Payson, AZ | ARIZONA | 66 FR 38603 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 07/25/2001 | Sacramento Co, CA | CALIFORNIA | 66 FR 38603 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 07/25/2001 | San Bernardino Co, CA | CALIFORNIA | 66 FR 38603 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 06/18/2001 | Salt Lake Co, UT | UTAH | 66 FR 32752 | Final Approval | Clean Data Determination/Attainment Determination |
| 06/18/2001 | Salt Lake Co, UT | UTAH | 66 FR 32752 | Final Approval | Attainment Date Extension |
| 06/18/2001 | Utah Co, UT | UTAH | 66 FR 32752 | Final Approval | Clean Data Determination/Attainment Determination |
| 06/18/2001 | Utah Co, UT | UTAH | 66 FR 32752 | Final Approval | Attainment Date Extension |
| 06/15/2001 | Pagosa Springs, CO | COLORADO | 66 FR 32594 | Proposed Approval | Redesignation to Maintenance |
| 06/15/2001 | Pagosa Springs, CO | COLORADO | 66 FR 32556 | Direct Final | Redesignation to Maintenance |
| 06/15/2001 | Telluride, CO | COLORADO | 66 FR 32594 | Proposed Approval | Redesignation to Maintenance |
| 06/15/2001 | Telluride, CO | COLORADO | 66 FR 32556 | Direct Final | Redesignation to Maintenance |
| 06/13/2001 | Coso Junction, CA | CALIFORNIA | 66 FR 31873 | Proposed Approval | Area Split |
| 06/13/2001 | Indian Wells, CA | CALIFORNIA | 66 FR 31873 | Proposed Approval | Area Split |
| 06/13/2001 | Trona, CA | CALIFORNIA | 66 FR 31873 | Proposed Approval | Area Split |
| 05/16/2001 | Spokane Co, WA | WASHINGTON | 66 FR 27055 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 03/13/2001 | Kent, WA | WASHINGTON | 66 FR 14512 | Proposed Approval | Redesignation to Maintenance |
| 03/13/2001 | Kent, WA | WASHINGTON | 66 FR 14492 | Direct Final | Redesignation to Maintenance |
| 03/13/2001 | King Co, WA | WASHINGTON | 66 FR 14512 | Proposed Approval | Redesignation to Maintenance |
| 03/13/2001 | King Co, WA | WASHINGTON | 66 FR 14492 | Direct Final | Redesignation to Maintenance |
| 03/13/2001 | Pierce Co, WA | WASHINGTON | 66 FR 14512 | Proposed Approval | Redesignation to Maintenance |
| 03/13/2001 | Pierce Co, WA | WASHINGTON | 66 FR 14492 | Direct Final | Redesignation to Maintenance |
| 02/09/2001 | Wallula, WA | WASHINGTON | 66 FR 9663 | Direct Final | Change to a Higher Classification (Bump-Ups) |
| 01/08/2001 | Washoe Co, NV | NEVADA | 66 FR 1268 | Direct Final | Change to a Higher Classification (Bump-Ups) |
| 12/12/2000 | Wallula, WA | WASHINGTON | 65 FR 77544 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 12/11/2000 | Cuyahoga Co, OH | OHIO | 65 FR 77308 | Final Approval | Redesignation to Maintenance |
| 12/11/2000 | Jefferson Co, OH | OHIO | 65 FR 77308 | Final Approval | Redesignation to Maintenance |
| 12/06/2000 | Portneuf Valley, ID | IDAHO | 65 FR 76203 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 11/22/2000 | Washoe Co, NV | NEVADA | 65 FR 70326 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 11/16/2000 | Wallula, WA | WASHINGTON | 65 FR 69275 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 10/04/2000 | Olympia, Tumwater, Lacey, WA | WASHINGTON | 65 FR 59154 | Proposed Approval | Redesignation to Maintenance |
| 10/04/2000 | Olympia, Tumwater, Lacey, WA | WASHINGTON | 65 FR 59128 | Direct Final | Redesignation to Maintenance |
| 09/21/2000 | Salt Lake Co, UT | UTAH | 65 FR 57127 | Proposed Approval | Failure to Attain by Attainment Date |
| 09/21/2000 | Salt Lake Co, UT | UTAH | 65 FR 57127 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 09/21/2000 | Salt Lake Co, UT | UTAH | 65 FR 57127 | Proposed Approval | Attainment Date Extension |
| 09/21/2000 | Utah Co, UT | UTAH | 65 FR 57127 | Proposed Approval | Failure to Attain by Attainment Date |
| 09/21/2000 | Utah Co, UT | UTAH | 65 FR 57127 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 09/21/2000 | Utah Co, UT | UTAH | 65 FR 57127 | Proposed Approval | Attainment Date Extension |
| 07/10/2000 | Cuyahoga Co, OH | OHIO | 65 FR 42312 | Proposed Approval | Redesignation to Maintenance |
| 07/10/2000 | Jefferson Co, OH | OHIO | 65 FR 42312 | Proposed Approval | Redesignation to Maintenance |
| 06/26/2000 | Boise-Northern Ada County, ID | IDAHO | 65 FR 39321 | Proposed Approval | Designation Reinstatement |
| 05/30/2000 | Canon City, CO | COLORADO | 65 FR 34427 | Proposed Approval | Redesignation to Maintenance |
| 05/30/2000 | Canon City, CO | COLORADO | 65 FR 34399 | Direct Final | Redesignation to Maintenance |
| 04/13/2000 | Phoenix, AZ | ARIZONA | 65 FR 19963 | Proposed Approval | Attainment Date Extension |
| 03/12/1999 | Boise-Northern Ada County, ID | IDAHO | 64 FR 12257 | Final Approval | Designation Revocation |
| 11/05/1998 | Fort Hall Indian Reservation | IDAHO | 63 FR 59722 | Final Approval | Designation to Nonattainment |
| 11/05/1998 | Portneuf Valley, ID | IDAHO | 63 FR 59722 | Final Approval | Area Split |
| 10/26/1998 | Boise-Northern Ada County, ID | IDAHO | 63 FR 57086 | Proposed Approval | Designation Revocation |
| 06/19/1998 | Fort Hall Indian Reservation | IDAHO | 63 FR 33597 | Proposed Approval | Designation to Nonattainment |
| 06/19/1998 | Fort Hall Indian Reservation | IDAHO | 63 FR 33605 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 06/19/1998 | Portneuf Valley, ID | IDAHO | 63 FR 33597 | Proposed Approval | Area Split |
| 03/11/1998 | Granite City, Nameoki Twsp, IL | ILLINOIS | 63 FR 11865 | Proposed Approval | Redesignation to Maintenance |
| 03/11/1998 | Granite City, Nameoki Twsp, IL | ILLINOIS | 63 FR 11842 | Direct Final | Redesignation to Maintenance |
| 08/26/1997 | Vermillion Co, IN | INDIANA | 62 FR 45199 | Proposed Approval | Redesignation to Maintenance |
| 08/26/1997 | Vermillion Co, IN | INDIANA | 62 FR 45168 | Direct Final | Redesignation to Maintenance |
| 06/06/1997 | Phoenix, AZ | ARIZONA | 62 FR 31025 | Proposed Approval | Redesignation to Maintenance |
| 12/18/1996 | Bonner Co (Sandpoint), ID | IDAHO | 61 FR 66642 | Proposed Approval | Failure to Attain by Attainment Date |
| 12/18/1996 | Bonner Co (Sandpoint), ID | IDAHO | 61 FR 66642 | Proposed Approval | Attainment Date Extension |
| 12/18/1996 | Bonner Co (Sandpoint), ID | IDAHO | 61 FR 66602 | Direct Final | Failure to Attain by Attainment Date |
| 12/18/1996 | Bonner Co (Sandpoint), ID | IDAHO | 61 FR 66602 | Direct Final | Attainment Date Extension |
| 12/18/1996 | Portneuf Valley, ID | IDAHO | 61 FR 66642 | Proposed Approval | Failure to Attain by Attainment Date |
| 12/18/1996 | Portneuf Valley, ID | IDAHO | 61 FR 66642 | Proposed Approval | Attainment Date Extension |
| 12/18/1996 | Portneuf Valley, ID | IDAHO | 61 FR 66602 | Direct Final | Failure to Attain by Attainment Date |
| 12/18/1996 | Portneuf Valley, ID | IDAHO | 61 FR 66602 | Direct Final | Attainment Date Extension |
| 08/08/1996 | Oglesby, IL | ILLINOIS | 61 FR 41372 | Proposed Approval | Redesignation to Maintenance |
| 08/08/1996 | Oglesby, IL | ILLINOIS | 61 FR 41342 | Direct Final | Redesignation to Maintenance |
| 08/05/1996 | Wayne Co, MI | MICHIGAN | 61 FR 40592 | Proposed Approval | Redesignation to Maintenance |
| 08/05/1996 | Wayne Co, MI | MICHIGAN | 61 FR 40516 | Direct Final | Redesignation to Maintenance |
| 06/12/1996 | Portneuf Valley, ID | IDAHO | 61 FR 29726 | Proposed Approval | Correction/Clarification |
| 06/12/1996 | Portneuf Valley, ID | IDAHO | 61 FR 29667 | Direct Final | Correction/Clarification |
| 05/10/1996 | Phoenix, AZ | ARIZONA | 61 FR 21372 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/08/1996 | Bonner Co (Sandpoint), ID | IDAHO | 61 FR 20730 | Final Approval | Failure to Attain by Attainment Date |
| 05/08/1996 | Bonner Co (Sandpoint), ID | IDAHO | 61 FR 20730 | Final Approval | Attainment Date Extension |
| 05/08/1996 | Portneuf Valley, ID | IDAHO | 61 FR 20730 | Final Approval | Failure to Attain by Attainment Date |
| 05/08/1996 | Portneuf Valley, ID | IDAHO | 61 FR 20730 | Final Approval | Attainment Date Extension |
| 08/30/1995 | Presque Isle, ME | MAINE | 60 FR 45113 | Proposed Approval | Redesignation to Maintenance |
| 08/30/1995 | Presque Isle, ME | MAINE | 60 FR 45056 | Direct Final | Redesignation to Maintenance |
| 08/28/1995 | Bonner Co (Sandpoint), ID | IDAHO | 60 FR 44452 | Proposed Approval | Failure to Attain by Attainment Date |
| 08/28/1995 | Bonner Co (Sandpoint), ID | IDAHO | 60 FR 44452 | Proposed Approval | Attainment Date Extension |
| 08/28/1995 | Portneuf Valley, ID | IDAHO | 60 FR 44452 | Proposed Approval | Failure to Attain by Attainment Date |
| 08/28/1995 | Portneuf Valley, ID | IDAHO | 60 FR 44452 | Proposed Approval | Attainment Date Extension |
| 07/28/1995 | Ogden, UT | UTAH | 60 FR 38726 | Direct Final | Designation to Nonattainment |
| 06/07/1995 | Phoenix, AZ | ARIZONA | 60 FR 30046 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 05/31/1995 | Olmsted Co, MN | MINNESOTA | 60 FR 28377 | Proposed Approval | Redesignation to Maintenance |
| 05/31/1995 | Olmsted Co, MN | MINNESOTA | 60 FR 28339 | Direct Final | Redesignation to Maintenance |
| 12/21/1993 | Coso Junction, CA | CALIFORNIA | 58 FR 67334 | Final Approval | Designation to Nonattainment |
| 12/21/1993 | Indian Wells, CA | CALIFORNIA | 58 FR 67334 | Final Approval | Designation to Nonattainment |
| 12/21/1993 | Lane Co, OR | OREGON | 58 FR 67334 | Final Approval | Designation to Nonattainment |
| 12/21/1993 | Mohave Co, AZ | ARIZONA | 58 FR 67334 | Final Approval | Designation to Nonattainment |
| 12/21/1993 | New York Co, NY | NEW YORK | 58 FR 67334 | Final Approval | Designation to Nonattainment |
| 12/21/1993 | Payson, AZ | ARIZONA | 58 FR 67334 | Final Approval | Designation to Nonattainment |
| 12/21/1993 | Pinehurst, ID | IDAHO | 58 FR 67334 | Final Approval | Designation to Nonattainment |
| 12/21/1993 | San Bernardino Co, CA | CALIFORNIA | 58 FR 67334 | Final Approval | Designation to Nonattainment |
| 12/21/1993 | Sanders County (part); Thompson Falls and vicinity, MT | MONTANA | 58 FR 67334 | Final Approval | Designation to Nonattainment |
| 12/21/1993 | Steamboat Springs, CO | COLORADO | 58 FR 67334 | Final Approval | Designation to Nonattainment |
| 12/21/1993 | Trona, CA | CALIFORNIA | 58 FR 67334 | Final Approval | Designation to Nonattainment |
| 12/21/1993 | Weirton, WV | WEST VIRGINIA | 58 FR 67334 | Final Approval | Designation to Nonattainment |
| 11/29/1993 | Mono Basin, CA | CALIFORNIA | 58 FR 62544 | Final Approval | Designation to Nonattainment |
| 10/19/1993 | Flathead County; Whitefish and vicinity, MT | MONTANA | 58 FR 53886 | Final Approval | Designation to Nonattainment |
| 09/24/1993 | Lake Co, OR | OREGON | 58 FR 49931 | Final Approval | Designation to Nonattainment |
| 01/08/1993 | Clark Co, NV | NEVADA | 58 FR 3334 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 01/08/1993 | Coachella Valley, CA | CALIFORNIA | 58 FR 3334 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 01/08/1993 | Los Angeles South Coast Air Basin, CA | CALIFORNIA | 58 FR 3334 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 01/08/1993 | Owens Valley, CA | CALIFORNIA | 58 FR 3334 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 01/08/1993 | San Joaquin Valley Air Basin, CA | CALIFORNIA | 58 FR 3334 | Final Approval | Change to a Higher Classification (Bump-Ups) |
First Notice