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

Data is current as of November 30, 2025
Ordered by State, Area Name

Click on the 'FR' link to view the Federal Register Notice

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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
11/19/2025		90 FR 52019	Proposed Approval	179B Determination
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
11/05/2024		89 FR 87828	Proposed Approval	Redesignation to Maintenance
11/18/2025		90 FR 51548	Final Approval	Redesignation to Maintenance
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
MARIPOSA COUNTY, 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
06/03/2025		90 FR 23501	Proposed Approval	Clean Data Determination/Attainment Determination
10/30/2025		90 FR 48820	Final Approval	Clean Data Determination/Attainment Determination
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)
11/20/2025		90 FR 52279	Proposed Approval	Change to a Higher Classification (Bump-Ups)
11/20/2025		90 FR 52279	Proposed Approval	Failure to Attain by Attainment Date
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
11/15/2024		89 FR 90249	Proposed Approval	Clean Data Determination/Attainment Determination
04/04/2025		90 FR 14730	Final 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
12/17/2024		89 FR 101901	Final Approval	Change to a Higher Classification (Bump-Ups)
12/17/2024		89 FR 101901	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
12/17/2024		89 FR 101901	Final Approval	Change to a Higher Classification (Bump-Ups)
12/17/2024		89 FR 101901	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
12/17/2024		89 FR 101901	Final Approval	Change to a Higher Classification (Bump-Ups)
12/17/2024		89 FR 101901	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
01/03/2025		90 FR 294	Withdrawal	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
11/15/2024		89 FR 90249	Proposed Approval	Clean Data Determination/Attainment Determination
04/04/2025		90 FR 14730	Final 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
12/17/2024		89 FR 101901	Final Approval	Change to a Higher Classification (Bump-Ups)
12/17/2024		89 FR 101901	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
12/17/2024		89 FR 101901	Final Approval	Change to a Higher Classification (Bump-Ups)
12/17/2024		89 FR 101901	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
12/17/2024		89 FR 101901	Final Approval	Change to a Higher Classification (Bump-Ups)
12/17/2024		89 FR 101901	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
11/25/2024		89 FR 92816	Final Approval	Change to a Higher Classification (Bump-Ups)
11/25/2024		89 FR 92816	Final Approval	Failure to Attain by Attainment Date
06/20/2025		90 FR 26240	Proposed Approval	Change to a Higher Classification (Bump-Ups)
06/20/2025		90 FR 26240	Proposed 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
12/19/2024		89 FR 103657	Final Approval	Change to a Higher Classification (Bump-Ups)
12/19/2024		89 FR 103657	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)
07/31/2025		90 FR 35985	Final Approval	Change to a Higher Classification (Bump-Ups)
07/31/2025		90 FR 35985	Final Approval	Failure to Attain by Attainment Date
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
12/17/2024		89 FR 101901	Final Approval	Change to a Higher Classification (Bump-Ups)
12/17/2024		89 FR 101901	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
12/09/2024		89 FR 97545	Final Approval	Change to a Higher Classification (Bump-Ups)
12/09/2024		89 FR 97545	Final Approval	Failure to Attain by Attainment Date
09/25/2025		90 FR 46128	Proposed Approval	Boundary Change
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
12/16/2024		89 FR 101483	Final Approval	Change to a Higher Classification (Bump-Ups)
12/16/2024		89 FR 101483	Final Approval	Failure to Attain by Attainment Date
12/16/2024		89 FR 101483	Final Approval	Attainment Date Extension Denied
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
11/15/2024		89 FR 90249	Proposed Approval	Clean Data Determination/Attainment Determination
04/04/2025		90 FR 14730	Final 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
12/17/2024		89 FR 101901	Final Approval	Change to a Higher Classification (Bump-Ups)
12/17/2024		89 FR 101901	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
12/17/2024		89 FR 101901	Final Approval	Change to a Higher Classification (Bump-Ups)
12/17/2024		89 FR 101901	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
12/17/2024		89 FR 101901	Final Approval	Change to a Higher Classification (Bump-Ups)
12/17/2024		89 FR 101901	Final Approval	Failure to Attain by Attainment Date