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Federal Register Notices Related to 8-Hour Ozone (2015) Designations and Classifications
Federal Register Notices Related to 8-Hour Ozone (2015) Designations and Classifications
Data is current as of May 31, 2023Ordered Chronologically in Descending Order
Click on the 'FR' link to view the Federal Register Notice
Last Notice
| 05/19/2023 | Detroit, MI | MICHIGAN | 88 FR 32584 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/19/2023 | Detroit, MI | MICHIGAN | 88 FR 32594 | Final Approval | Redesignation to Maintenance |
| 04/18/2023 | Louisville, KY-IN | KENTUCKY | 88 FR 23598 | Proposed Approval | Redesignation to Maintenance |
| 04/04/2023 | El Paso-Las Cruces, TX-NM | NEW MEXICO | 88 FR 19901 | Proposed Approval | Extension of Comment Period |
| 04/04/2023 | El Paso-Las Cruces, TX-NM | TEXAS | 88 FR 19901 | Proposed Approval | Extension of Comment Period |
| 03/07/2023 | El Paso-Las Cruces, TX-NM | NEW MEXICO | 88 FR 14095 | Proposed Approval | 179B Determination |
| 03/07/2023 | El Paso-Las Cruces, TX-NM | TEXAS | 88 FR 14095 | Proposed Approval | 179B Determination |
| 02/03/2023 | Detroit, MI | MICHIGAN | 88 FR 7382 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 02/01/2023 | Detroit, MI | MICHIGAN | 88 FR 6633 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 02/01/2023 | Detroit, MI | MICHIGAN | 88 FR 6633 | Final Approval | Failure to Attain by Attainment Date |
| 02/01/2023 | Washington, DC-MD-VA | DISTRICT OF COL | 88 FR 6688 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 02/01/2023 | Washington, DC-MD-VA | MARYLAND | 88 FR 6688 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 02/01/2023 | Washington, DC-MD-VA | VIRGINIA | 88 FR 6688 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 01/30/2023 | Cincinnati, OH-KY | OHIO | 88 FR 5787 | Final Approval | Correction/Clarification |
| 01/05/2023 | Las Vegas, NV | NEVADA | 88 FR 775 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 01/05/2023 | Las Vegas, NV | NEVADA | 88 FR 775 | Final Approval | Failure to Attain by Attainment Date |
| 10/20/2022 | Butte County, CA | CALIFORNIA | 87 FR 63698 | Final Approval | Clean Data Determination/Attainment Determination |
| 10/20/2022 | Calaveras County, CA | CALIFORNIA | 87 FR 63698 | Final Approval | Clean Data Determination/Attainment Determination |
| 10/20/2022 | Imperial County, CA | CALIFORNIA | 87 FR 63701 | Final Approval | 179B Determination |
| 10/20/2022 | San Luis Obispo (Eastern part), CA | CALIFORNIA | 87 FR 63698 | Final Approval | Clean Data Determination/Attainment Determination |
| 10/20/2022 | Sutter Buttes, CA | CALIFORNIA | 87 FR 63698 | Final Approval | Clean Data Determination/Attainment Determination |
| 10/20/2022 | Tuolumne County, CA | CALIFORNIA | 87 FR 63698 | Final Approval | Clean Data Determination/Attainment Determination |
| 10/20/2022 | Tuscan Buttes, CA | CALIFORNIA | 87 FR 63698 | Final Approval | Clean Data Determination/Attainment Determination |
| 10/17/2022 | Atlanta, GA | GEORGIA | 87 FR 62733 | Final Approval | Redesignation to Maintenance |
| 10/07/2022 | Allegan County, MI | MICHIGAN | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Allegan County, MI | MICHIGAN | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Amador County, CA | CALIFORNIA | 87 FR 60897 | Final Approval | Clean Data Determination/Attainment Determination |
| 10/07/2022 | Atlanta, GA | GEORGIA | 87 FR 60897 | Final Approval | Clean Data Determination/Attainment Determination |
| 10/07/2022 | Baltimore, MD | MARYLAND | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Baltimore, MD | MARYLAND | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Berrien County, MI | MICHIGAN | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Berrien County, MI | MICHIGAN | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Chicago, IL-IN-WI | ILLINOIS | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Chicago, IL-IN-WI | ILLINOIS | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Chicago, IL-IN-WI | INDIANA | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Chicago, IL-IN-WI | INDIANA | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Chicago, IL-IN-WI | WISCONSIN | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Chicago, IL-IN-WI | WISCONSIN | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Cincinnati, OH-KY | KENTUCKY | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Cincinnati, OH-KY | KENTUCKY | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Cleveland, OH | OHIO | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Cleveland, OH | OHIO | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Dallas-Fort Worth, TX | TEXAS | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Dallas-Fort Worth, TX | TEXAS | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Denver Metro/North Front Range, CO | COLORADO | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Denver Metro/North Front Range, CO | COLORADO | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Greater Connecticut, CT | CONNECTICUT | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Greater Connecticut, CT | CONNECTICUT | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Houston-Galveston-Brazoria, TX | TEXAS | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Houston-Galveston-Brazoria, TX | TEXAS | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Louisville, KY-IN | KENTUCKY | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Louisville, KY-IN | KENTUCKY | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Mariposa County, CA | CALIFORNIA | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Mariposa County, CA | CALIFORNIA | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Milwaukee, WI | WISCONSIN | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Milwaukee, WI | WISCONSIN | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Muskegon County, MI | MICHIGAN | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Muskegon County, MI | MICHIGAN | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Northern Wasatch Front, UT | UTAH | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Northern Wasatch Front, UT | UTAH | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation, CA | CALIFORNIA | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation, CA | CALIFORNIA | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | DELAWARE | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | DELAWARE | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | MARYLAND | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | MARYLAND | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | NEW JERSEY | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | NEW JERSEY | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | PENNSYLVANIA | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | PENNSYLVANIA | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Phoenix-Mesa, AZ | ARIZONA | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Phoenix-Mesa, AZ | ARIZONA | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | San Antonio, TX | TEXAS | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | San Antonio, TX | TEXAS | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | San Francisco Bay Area, CA | CALIFORNIA | 87 FR 60897 | Final Approval | Clean Data Determination/Attainment Determination |
| 10/07/2022 | Sheboygan County, WI | WISCONSIN | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Sheboygan County, WI | WISCONSIN | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Southern Wasatch Front, UT | UTAH | 87 FR 60897 | Final Approval | Clean Data Determination/Attainment Determination |
| 10/07/2022 | St. Louis, MO-IL | ILLINOIS | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | St. Louis, MO-IL | ILLINOIS | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | St. Louis, MO-IL | MISSOURI | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | St. Louis, MO-IL | MISSOURI | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Uinta Basin, UT | UTAH | 87 FR 60897 | Final Approval | Attainment Date Extension |
| 10/07/2022 | Washington, DC-MD-VA | DISTRICT OF COL | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Washington, DC-MD-VA | DISTRICT OF COL | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Washington, DC-MD-VA | MARYLAND | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Washington, DC-MD-VA | MARYLAND | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Washington, DC-MD-VA | VIRGINIA | 87 FR 60897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Washington, DC-MD-VA | VIRGINIA | 87 FR 60897 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Yuma, AZ | ARIZONA | 87 FR 60897 | Final Approval | Clean Data Determination/Attainment Determination |
| 08/26/2022 | Atlanta, GA | GEORGIA | 87 FR 52487 | Proposed Approval | Redesignation to Maintenance |
| 08/15/2022 | Imperial County, CA | CALIFORNIA | 87 FR 50030 | Proposed Approval | 179B Determination |
| 07/22/2022 | Las Vegas, NV | NEVADA | 87 FR 43764 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 07/22/2022 | Las Vegas, NV | NEVADA | 87 FR 43764 | Proposed Approval | Failure to Attain by Attainment Date |
| 07/14/2022 | Butte County, CA | CALIFORNIA | 87 FR 42126 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 07/14/2022 | Calaveras County, CA | CALIFORNIA | 87 FR 42126 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 07/14/2022 | San Luis Obispo (Eastern part), CA | CALIFORNIA | 87 FR 42126 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 07/14/2022 | Sutter Buttes, CA | CALIFORNIA | 87 FR 42126 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 07/14/2022 | Tuolumne County, CA | CALIFORNIA | 87 FR 42126 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 07/14/2022 | Tuscan Buttes, CA | CALIFORNIA | 87 FR 42126 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 07/05/2022 | Louisville, KY-IN | INDIANA | 87 FR 39750 | Final Approval | Redesignation to Maintenance |
| 06/09/2022 | Cincinnati, OH-KY | OHIO | 87 FR 35104 | Final Approval | Redesignation to Maintenance |
| 05/18/2022 | Louisville, KY-IN | INDIANA | 87 FR 30129 | Proposed Approval | Redesignation to Maintenance |
| 04/29/2022 | Door County-Revised, WI | WISCONSIN | 87 FR 25410 | Final Approval | Redesignation to Maintenance |
| 04/13/2022 | Allegan County, MI | MICHIGAN | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Allegan County, MI | MICHIGAN | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Amador County, CA | CALIFORNIA | 87 FR 21842 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/13/2022 | Atlanta, GA | GEORGIA | 87 FR 21842 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/13/2022 | Baltimore, MD | MARYLAND | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Baltimore, MD | MARYLAND | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Berrien County, MI | MICHIGAN | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Berrien County, MI | MICHIGAN | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Chicago, IL-IN-WI | ILLINOIS | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Chicago, IL-IN-WI | ILLINOIS | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Chicago, IL-IN-WI | INDIANA | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Chicago, IL-IN-WI | INDIANA | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Chicago, IL-IN-WI | WISCONSIN | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Chicago, IL-IN-WI | WISCONSIN | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Cincinnati, OH-KY | KENTUCKY | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Cincinnati, OH-KY | KENTUCKY | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Cincinnati, OH-KY | OHIO | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Cincinnati, OH-KY | OHIO | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Cleveland, OH | OHIO | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Cleveland, OH | OHIO | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Dallas-Fort Worth, TX | TEXAS | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Dallas-Fort Worth, TX | TEXAS | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Denver Metro/North Front Range, CO | COLORADO | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Denver Metro/North Front Range, CO | COLORADO | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Detroit, MI | MICHIGAN | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Detroit, MI | MICHIGAN | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Door County-Revised, WI | WISCONSIN | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Door County-Revised, WI | WISCONSIN | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Greater Connecticut, CT | CONNECTICUT | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Greater Connecticut, CT | CONNECTICUT | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Houston-Galveston-Brazoria, TX | TEXAS | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Houston-Galveston-Brazoria, TX | TEXAS | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Louisville, KY-IN | INDIANA | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Louisville, KY-IN | INDIANA | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Louisville, KY-IN | KENTUCKY | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Louisville, KY-IN | KENTUCKY | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Manitowoc County, WI | CALIFORNIA | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Manitowoc County, WI | WISCONSIN | 87 FR 21842 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/13/2022 | Milwaukee, WI | WISCONSIN | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Milwaukee, WI | WISCONSIN | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Muskegon County, MI | MICHIGAN | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Muskegon County, MI | MICHIGAN | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Northern Wasatch Front, UT | UTAH | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Northern Wasatch Front, UT | UTAH | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation, CA | CALIFORNIA | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation, CA | CALIFORNIA | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | DELAWARE | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | DELAWARE | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | MARYLAND | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | MARYLAND | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | NEW JERSEY | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | NEW JERSEY | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | PENNSYLVANIA | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | PENNSYLVANIA | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Phoenix-Mesa, AZ | ARIZONA | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Phoenix-Mesa, AZ | ARIZONA | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | San Antonio, TX | TEXAS | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | San Antonio, TX | TEXAS | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | San Francisco Bay Area, CA | CALIFORNIA | 87 FR 21842 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/13/2022 | Sheboygan County, WI | WISCONSIN | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Sheboygan County, WI | WISCONSIN | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Southern Wasatch Front, UT | UTAH | 87 FR 21842 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/13/2022 | St. Louis, MO-IL | ILLINOIS | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | St. Louis, MO-IL | ILLINOIS | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | St. Louis, MO-IL | MISSOURI | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | St. Louis, MO-IL | MISSOURI | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Uinta Basin, UT | UTAH | 87 FR 21842 | Proposed Approval | Attainment Date Extension |
| 04/13/2022 | Washington, DC-MD-VA | DISTRICT OF COL | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Washington, DC-MD-VA | DISTRICT OF COL | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Washington, DC-MD-VA | MARYLAND | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Washington, DC-MD-VA | MARYLAND | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Washington, DC-MD-VA | VIRGINIA | 87 FR 21842 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Washington, DC-MD-VA | VIRGINIA | 87 FR 21842 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Yuma, AZ | ARIZONA | 87 FR 21842 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/04/2022 | Detroit, MI | MICHIGAN | 87 FR 19414 | Proposed Approval | Extension of Comment Period |
| 03/31/2022 | Manitowoc County, WI | WISCONSIN | 87 FR 18702 | Final Approval | Redesignation to Maintenance |
| 03/14/2022 | Detroit, MI | MICHIGAN | 87 FR 14210 | Proposed Approval | Redesignation to Maintenance |
| 03/03/2022 | Door County-Revised, WI | WISCONSIN | 87 FR 12020 | Proposed Approval | Redesignation to Maintenance |
| 02/11/2022 | Cincinnati, OH-KY | OHIO | 87 FR 7978 | Proposed Approval | Redesignation to Maintenance |
| 02/01/2022 | Manitowoc County, WI | WISCONSIN | 87 FR 5438 | Proposed Approval | Redesignation to Maintenance |
| 11/30/2021 | Denver Metro/North Front Range, CO | COLORADO | 86 FR 67864 | Final Approval | Boundary Change |
| 11/30/2021 | El Paso-Las Cruces, TX-NM | NEW MEXICO | 86 FR 67864 | Final Approval | Boundary Change |
| 11/30/2021 | El Paso-Las Cruces, TX-NM | TEXAS | 86 FR 67864 | Final Approval | Boundary Change |
| 10/28/2021 | Kern County (Eastern Kern), CA | CALIFORNIA | 86 FR 59648 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/28/2021 | Nevada County (Western part), CA | CALIFORNIA | 86 FR 59648 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/28/2021 | Sacramento Metro, CA | CALIFORNIA | 86 FR 59648 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 08/13/2021 | Kern County (Eastern Kern), CA | CALIFORNIA | 86 FR 44677 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/13/2021 | Nevada County (Western part), CA | CALIFORNIA | 86 FR 44677 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/13/2021 | Sacramento Metro, CA | CALIFORNIA | 86 FR 44677 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 06/14/2021 | Chicago, IL-IN-WI | ILLINOIS | 86 FR 31438 | Final Approval | Boundary Change |
| 06/14/2021 | Chicago, IL-IN-WI | INDIANA | 86 FR 31438 | Final Approval | Boundary Change |
| 06/14/2021 | Chicago, IL-IN-WI | WISCONSIN | 86 FR 31438 | Final Approval | Boundary Change |
| 06/14/2021 | Denver Metro/North Front Range, CO | COLORADO | 86 FR 31460 | Proposed Approval | Boundary Change |
| 06/14/2021 | Door County-Revised, WI | WISCONSIN | 86 FR 31438 | Final Approval | Designation to Nonattainment |
| 06/14/2021 | El Paso-Las Cruces, TX-NM | NEW MEXICO | 86 FR 31460 | Proposed Approval | Boundary Change |
| 06/14/2021 | El Paso-Las Cruces, TX-NM | TEXAS | 86 FR 31460 | Proposed Approval | Boundary Change |
| 06/14/2021 | Manitowoc County, WI | WISCONSIN | 86 FR 31438 | Final Approval | Boundary Change |
| 06/14/2021 | Milwaukee, WI | WISCONSIN | 86 FR 31438 | Final Approval | Boundary Change |
| 06/14/2021 | Sheboygan County, WI | WISCONSIN | 86 FR 31438 | Final Approval | Boundary Change |
| 06/14/2021 | St. Louis, MO-IL | ILLINOIS | 86 FR 31438 | Final Approval | Boundary Change |
| 06/14/2021 | St. Louis, MO-IL | MISSOURI | 86 FR 31438 | Final Approval | Boundary Change |
| 06/02/2021 | San Diego County, CA | CALIFORNIA | 86 FR 29522 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 04/08/2021 | San Diego County, CA | CALIFORNIA | 86 FR 18227 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 06/10/2020 | Door County, WI | WISCONSIN | 85 FR 35377 | Final Approval | Redesignation to Maintenance |
| 05/19/2020 | Berrien County, MI | MICHIGAN | 85 FR 29895 | Proposed Approval | Redesignation to Maintenance |
| 03/13/2020 | Door County, WI | WISCONSIN | 85 FR 14608 | Proposed Approval | Redesignation to Maintenance |
| 08/21/2019 | Columbus, OH | OHIO | 84 FR 43508 | Final Approval | Redesignation to Maintenance |
| 07/03/2019 | Columbus, OH | OHIO | 84 FR 31814 | Proposed Approval | Redesignation to Maintenance |
| 07/25/2018 | San Antonio, TX | TEXAS | 83 FR 35136 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Allegan County, MI | MICHIGAN | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Amador County, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Atlanta, GA | GEORGIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Baltimore, MD | MARYLAND | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Berrien County, MI | MICHIGAN | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Butte County, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Calaveras County, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Chicago, IL-IN-WI | ILLINOIS | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Chicago, IL-IN-WI | INDIANA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Chicago, IL-IN-WI | WISCONSIN | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Cincinnati, OH-KY | KENTUCKY | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Cincinnati, OH-KY | OHIO | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Cleveland, OH | OHIO | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Columbus, OH | OHIO | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Dallas-Fort Worth, TX | TEXAS | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Denver Metro/North Front Range, CO | COLORADO | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Detroit, MI | MICHIGAN | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Door County, WI | WISCONSIN | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | El Paso-Las Cruces, TX-NM | NEW MEXICO | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Greater Connecticut, CT | CONNECTICUT | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Houston-Galveston-Brazoria, TX | TEXAS | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Imperial County, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Kern County (Eastern Kern), CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Las Vegas, NV | NEVADA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Los Angeles-San Bernardino Counties (West Mojave Desert), CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Los Angeles-South Coast Air Basin, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Louisville, KY-IN | INDIANA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Louisville, KY-IN | KENTUCKY | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Manitowoc County, WI | WISCONSIN | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Mariposa County, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Milwaukee, WI | WISCONSIN | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Morongo Band of Mission Indians, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Muskegon County, MI | MICHIGAN | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Nevada County (Western part), CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | New York-Northern New Jersey-Long Island, NY-NJ-CT | CONNECTICUT | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | New York-Northern New Jersey-Long Island, NY-NJ-CT | NEW JERSEY | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | New York-Northern New Jersey-Long Island, NY-NJ-CT | NEW YORK | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Northern Wasatch Front, UT | UTAH | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | DELAWARE | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | MARYLAND | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | NEW JERSEY | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | PENNSYLVANIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Phoenix-Mesa, AZ | ARIZONA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Riverside County (Coachella Valley), CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Sacramento Metro, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | San Diego County, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | San Francisco Bay Area, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | San Joaquin Valley, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | San Luis Obispo (Eastern part), CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Sheboygan County, WI | WISCONSIN | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Southern Wasatch Front, UT | UTAH | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | St. Louis, MO-IL | ILLINOIS | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | St. Louis, MO-IL | MISSOURI | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Sutter Buttes, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Tuolumne County, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Tuscan Buttes, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Uinta Basin, UT | UTAH | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Ventura County, CA | CALIFORNIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Washington, DC-MD-VA | DISTRICT OF COL | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Washington, DC-MD-VA | MARYLAND | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Washington, DC-MD-VA | VIRGINIA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
| 06/04/2018 | Yuma, AZ | ARIZONA | 83 FR 25776 | Final Approval | Designation to Nonattainment |
First Notice