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Federal Register Notices Related to 8-Hour Ozone (2015) Designations and Classifications

Data is current as of September 30, 2024
Ordered by State, Area Name

Click on the 'FR' link to view the Federal Register Notice
ARIZONA
PHOENIX-MESA, AZ
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
YUMA, AZ
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Clean Data Determination/Attainment Determination   
  10/07/2022      87 FR 60897      Final Approval      Clean Data Determination/Attainment Determination   
CALIFORNIA
AMADOR COUNTY, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Clean Data Determination/Attainment Determination   
  10/07/2022      87 FR 60897      Final Approval      Clean Data Determination/Attainment Determination   
BUTTE COUNTY, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  07/14/2022      87 FR 42126      Proposed Approval      Clean Data Determination/Attainment Determination   
  10/20/2022      87 FR 63698      Final Approval      Clean Data Determination/Attainment Determination   
CALAVERAS COUNTY, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  07/14/2022      87 FR 42126      Proposed Approval      Clean Data Determination/Attainment Determination   
  10/20/2022      87 FR 63698      Final Approval      Clean Data Determination/Attainment Determination   
IMPERIAL COUNTY, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  08/15/2022      87 FR 50030      Proposed Approval      179B Determination   
  10/20/2022      87 FR 63701      Final Approval      179B Determination   
KERN COUNTY (EASTERN KERN), CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  08/13/2021      86 FR 44677      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  10/28/2021      86 FR 59648      Final Approval      Change to a Higher Classification (Bump-Ups)   
LOS ANGELES-SAN BERNARDINO COUNTIES (WEST MOJAVE DESERT), CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
LOS ANGELES-SOUTH COAST AIR BASIN, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
MANITOWOC COUNTY, WI
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
MARIPOSA COUNTY, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
MORONGO BAND OF MISSION INDIANS, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
NEVADA COUNTY (WESTERN PART), CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  08/13/2021      86 FR 44677      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  10/28/2021      86 FR 59648      Final Approval      Change to a Higher Classification (Bump-Ups)   
PECHANGA BAND OF LUISENO MISSION INDIANS OF THE PECHANGA RESERVATION, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
RIVERSIDE COUNTY (COACHELLA VALLEY), CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
SACRAMENTO METRO, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  08/13/2021      86 FR 44677      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  10/28/2021      86 FR 59648      Final Approval      Change to a Higher Classification (Bump-Ups)   
SAN DIEGO COUNTY, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/08/2021      86 FR 18227      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  06/02/2021      86 FR 29522      Final Approval      Change to a Higher Classification (Bump-Ups)   
SAN FRANCISCO BAY AREA, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Clean Data Determination/Attainment Determination   
  10/07/2022      87 FR 60897      Final Approval      Clean Data Determination/Attainment Determination   
SAN JOAQUIN VALLEY, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
SAN LUIS OBISPO (EASTERN PART), CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  07/14/2022      87 FR 42126      Proposed Approval      Clean Data Determination/Attainment Determination   
  10/20/2022      87 FR 63698      Final Approval      Clean Data Determination/Attainment Determination   
SUTTER BUTTES, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  07/14/2022      87 FR 42126      Proposed Approval      Clean Data Determination/Attainment Determination   
  10/20/2022      87 FR 63698      Final Approval      Clean Data Determination/Attainment Determination   
TUOLUMNE COUNTY, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  07/14/2022      87 FR 42126      Proposed Approval      Clean Data Determination/Attainment Determination   
  10/20/2022      87 FR 63698      Final Approval      Clean Data Determination/Attainment Determination   
TUSCAN BUTTES, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  07/14/2022      87 FR 42126      Proposed Approval      Clean Data Determination/Attainment Determination   
  10/20/2022      87 FR 63698      Final Approval      Clean Data Determination/Attainment Determination   
VENTURA COUNTY, CA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
COLORADO
DENVER METRO/NORTH FRONT RANGE, CO
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  06/14/2021      86 FR 31460      Proposed Approval      Boundary Change   
  11/30/2021      86 FR 67864      Final Approval      Boundary Change   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
  07/24/2024      89 FR 59832      Final Approval      Change to a Higher Classification (Bump-Ups)   
CONNECTICUT
GREATER CONNECTICUT, CT
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
  07/29/2024      89 FR 60827      Final Approval      Change to a Higher Classification (Bump-Ups)   
NEW YORK-NORTHERN NEW JERSEY-LONG ISLAND, NY-NJ-CT
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  07/25/2024      89 FR 60314      Final Approval      Change to a Higher Classification (Bump-Ups)   
DELAWARE
PHILADELPHIA-WILMINGTON-ATLANTIC CITY, PA-NJ-MD-DE
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
  07/30/2024      89 FR 61025      Final Approval      Change to a Higher Classification (Bump-Ups)   
DISTRICT OF COLUMBIA
WASHINGTON, DC-MD-VA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
  02/01/2023      88 FR 6688      Proposed Approval      Clean Data Determination/Attainment Determination   
GEORGIA
ATLANTA, GA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Clean Data Determination/Attainment Determination   
  08/26/2022      87 FR 52487      Proposed Approval      Redesignation to Maintenance   
  10/07/2022      87 FR 60897      Final Approval      Clean Data Determination/Attainment Determination   
  10/17/2022      87 FR 62733      Final Approval      Redesignation to Maintenance   
ILLINOIS
CHICAGO, IL-IN-WI
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  06/14/2021      86 FR 31438      Final Approval      Boundary Change   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
ST. LOUIS, MO-IL
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  06/14/2021      86 FR 31438      Final Approval      Boundary Change   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
INDIANA
CHICAGO, IL-IN-WI
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  06/14/2021      86 FR 31438      Final Approval      Boundary Change   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
LOUISVILLE, KY-IN
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  05/18/2022      87 FR 30129      Proposed Approval      Redesignation to Maintenance   
  07/05/2022      87 FR 39750      Final Approval      Redesignation to Maintenance   
KENTUCKY
CINCINNATI, OH-KY
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
  07/28/2023      88 FR 48772      Proposed Approval      Redesignation to Maintenance   
  10/04/2023      88 FR 68471      Final Approval      Redesignation to Maintenance   
LOUISVILLE, KY-IN
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
  04/18/2023      88 FR 23598      Proposed Approval      Redesignation to Maintenance   
MARYLAND
BALTIMORE, MD
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
  08/01/2024      89 FR 62663      Final Approval      Change to a Higher Classification (Bump-Ups)   
PHILADELPHIA-WILMINGTON-ATLANTIC CITY, PA-NJ-MD-DE
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
  07/30/2024      89 FR 61025      Final Approval      Change to a Higher Classification (Bump-Ups)   
WASHINGTON, DC-MD-VA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
  02/01/2023      88 FR 6688      Proposed Approval      Clean Data Determination/Attainment Determination   
MICHIGAN
ALLEGAN COUNTY, MI
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
BERRIEN COUNTY, MI
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  05/19/2020      85 FR 29895      Proposed Approval      Redesignation to Maintenance   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
DETROIT, MI
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  03/14/2022      87 FR 14210      Proposed Approval      Redesignation to Maintenance   
  04/04/2022      87 FR 19414      Proposed Approval      Extension of Comment Period   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  02/01/2023      88 FR 6633      Final Approval      Change to a Higher Classification (Bump-Ups)   
  02/01/2023      88 FR 6633      Final Approval      Failure to Attain by Attainment Date   
  02/03/2023      88 FR 7382      Proposed Approval      Clean Data Determination/Attainment Determination   
  05/19/2023      88 FR 32584      Final Approval      Clean Data Determination/Attainment Determination   
  05/19/2023      88 FR 32594      Final Approval      Redesignation to Maintenance   
MUSKEGON COUNTY, MI
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
MISSOURI
ST. LOUIS, MO-IL
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  06/14/2021      86 FR 31438      Final Approval      Boundary Change   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
NEVADA
LAS VEGAS, NV
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  07/22/2022      87 FR 43764      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  07/22/2022      87 FR 43764      Proposed Approval      Failure to Attain by Attainment Date   
  01/05/2023      88 FR 775      Final Approval      Change to a Higher Classification (Bump-Ups)   
  01/05/2023      88 FR 775      Final Approval      Failure to Attain by Attainment Date   
NEW JERSEY
NEW YORK-NORTHERN NEW JERSEY-LONG ISLAND, NY-NJ-CT
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  07/25/2024      89 FR 60314      Final Approval      Change to a Higher Classification (Bump-Ups)   
PHILADELPHIA-WILMINGTON-ATLANTIC CITY, PA-NJ-MD-DE
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
  07/30/2024      89 FR 61025      Final Approval      Change to a Higher Classification (Bump-Ups)   
NEW MEXICO
EL PASO-LAS CRUCES, TX-NM
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  06/14/2021      86 FR 31460      Proposed Approval      Boundary Change   
  11/30/2021      86 FR 67864      Final Approval      Boundary Change   
  03/07/2023      88 FR 14095      Proposed Approval      179B Determination   
  04/04/2023      88 FR 19901      Proposed Approval      Extension of Comment Period   
NEW YORK
NEW YORK-NORTHERN NEW JERSEY-LONG ISLAND, NY-NJ-CT
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  07/25/2024      89 FR 60314      Final Approval      Change to a Higher Classification (Bump-Ups)   
OHIO
CINCINNATI, OH-KY
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  02/11/2022      87 FR 7978      Proposed Approval      Redesignation to Maintenance   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  06/09/2022      87 FR 35104      Final Approval      Redesignation to Maintenance   
  01/30/2023      88 FR 5787      Final Approval      Correction/Clarification   
CLEVELAND, OH
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
COLUMBUS, OH
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  07/03/2019      84 FR 31814      Proposed Approval      Redesignation to Maintenance   
  08/21/2019      84 FR 43508      Final Approval      Redesignation to Maintenance   
PENNSYLVANIA
PHILADELPHIA-WILMINGTON-ATLANTIC CITY, PA-NJ-MD-DE
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
  07/30/2024      89 FR 61025      Final Approval      Change to a Higher Classification (Bump-Ups)   
TEXAS
DALLAS-FORT WORTH, TX
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
  01/26/2024      89 FR 5145      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  06/20/2024      89 FR 51829      Final Approval      Change to a Higher Classification (Bump-Ups)   
EL PASO-LAS CRUCES, TX-NM
  06/14/2021      86 FR 31460      Proposed Approval      Boundary Change   
  11/30/2021      86 FR 67864      Final Approval      Boundary Change   
  03/07/2023      88 FR 14095      Proposed Approval      179B Determination   
  04/04/2023      88 FR 19901      Proposed Approval      Extension of Comment Period   
HOUSTON-GALVESTON-BRAZORIA, TX
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
  01/26/2024      89 FR 5145      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  06/20/2024      89 FR 51829      Final Approval      Change to a Higher Classification (Bump-Ups)   
SAN ANTONIO, TX
  07/25/2018      83 FR 35136      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
  01/26/2024      89 FR 5145      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  06/20/2024      89 FR 51829      Final Approval      Change to a Higher Classification (Bump-Ups)   
UTAH
NORTHERN WASATCH FRONT, UT
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
SOUTHERN WASATCH FRONT, UT
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Clean Data Determination/Attainment Determination   
  10/07/2022      87 FR 60897      Final Approval      Clean Data Determination/Attainment Determination   
UINTA BASIN, UT
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Attainment Date Extension   
  10/07/2022      87 FR 60897      Final Approval      Attainment Date Extension   
  04/10/2024      89 FR 25223      Proposed Approval      Clean Data Determination/Attainment Determination   
  04/10/2024      89 FR 25223      Proposed Approval      Attainment Date Extension   
VIRGINIA
WASHINGTON, DC-MD-VA
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
  02/01/2023      88 FR 6688      Proposed Approval      Clean Data Determination/Attainment Determination   
WISCONSIN
CHICAGO, IL-IN-WI
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  06/14/2021      86 FR 31438      Final Approval      Boundary Change   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
DOOR COUNTY, WI
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  03/13/2020      85 FR 14608      Proposed Approval      Redesignation to Maintenance   
  06/10/2020      85 FR 35377      Final Approval      Redesignation to Maintenance   
DOOR COUNTY-REVISED, WI
  06/14/2021      86 FR 31438      Final Approval      Designation to Nonattainment   
  03/03/2022      87 FR 12020      Proposed Approval      Redesignation to Maintenance   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  04/29/2022      87 FR 25410      Final Approval      Redesignation to Maintenance   
MANITOWOC COUNTY, WI
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  06/14/2021      86 FR 31438      Final Approval      Boundary Change   
  02/01/2022      87 FR 5438      Proposed Approval      Redesignation to Maintenance   
  03/31/2022      87 FR 18702      Final Approval      Redesignation to Maintenance   
  04/13/2022      87 FR 21842      Proposed Approval      Clean Data Determination/Attainment Determination   
MILWAUKEE, WI
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  06/14/2021      86 FR 31438      Final Approval      Boundary Change   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date   
SHEBOYGAN COUNTY, WI
  06/04/2018      83 FR 25776      Final Approval      Designation to Nonattainment   
  06/14/2021      86 FR 31438      Final Approval      Boundary Change   
  04/13/2022      87 FR 21842      Proposed Approval      Change to a Higher Classification (Bump-Ups)   
  04/13/2022      87 FR 21842      Proposed Approval      Failure to Attain by Attainment Date   
  10/07/2022      87 FR 60897      Final Approval      Change to a Higher Classification (Bump-Ups)   
  10/07/2022      87 FR 60897      Final Approval      Failure to Attain by Attainment Date