Federal Register Notices Related to PM-2.5 (2012) Designations and Classifications

Data is current as of November 30, 2025
Ordered by Category

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

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CHANGE TO A HIGHER CLASSIFICATION (BUMP-UPS)
07/02/2020	CALIFORNIA	Los Angeles-South Coast Air Basin, CA	85 FR 40026	Proposed Approval
11/09/2020	CALIFORNIA	Los Angeles-South Coast Air Basin, CA	85 FR 71264	Final Approval
09/01/2021	CALIFORNIA	San Joaquin Valley, CA	86 FR 49100	Proposed Approval
11/26/2021	CALIFORNIA	San Joaquin Valley, CA	86 FR 67343	Final Approval
11/01/2022	CALIFORNIA	Plumas County, CA	87 FR 65719	Proposed Approval
12/29/2022	CALIFORNIA	Plumas County, CA	87 FR 80076	Final Approval
CLEAN DATA DETERMINATION/ATTAINMENT DETERMINATION
12/13/2016	PENNSYLVANIA	Delaware County, PA	81 FR 89889	Proposed Approval
12/13/2016	PENNSYLVANIA	Delaware County, PA	81 FR 89868	Direct Final
11/02/2017	PENNSYLVANIA	Lebanon County, PA	82 FR 50851	Proposed Approval
03/06/2018	PENNSYLVANIA	Lebanon County, PA	83 FR 9435	Final Approval
10/22/2018	IDAHO	West Silver Valley, ID	83 FR 53201	Proposed Approval
12/21/2018	IDAHO	West Silver Valley, ID	83 FR 65535	Final Approval
09/03/2021	PENNSYLVANIA	Allegheny County, PA	86 FR 49497	Proposed Approval
03/16/2022	PENNSYLVANIA	Allegheny County, PA	87 FR 14799	Final Approval
10/20/2022	CALIFORNIA	Imperial County, CA	87 FR 63751	Proposed Approval
01/11/2023	CALIFORNIA	Imperial County, CA	88 FR 1515	Final Approval
02/08/2023	PENNSYLVANIA	Allegheny County, PA	88 FR 8249	Proposed Approval
05/19/2023	PENNSYLVANIA	Allegheny County, PA	88 FR 32117	Final Approval
CORRECTION/CLARIFICATION
03/19/2021	CALIFORNIA	Los Angeles-South Coast Air Basin, CA	86 FR 14832	Final Approval
FAILURE TO ATTAIN BY ATTAINMENT DATE
11/01/2022	CALIFORNIA	Plumas County, CA	87 FR 65719	Proposed Approval
12/29/2022	CALIFORNIA	Plumas County, CA	87 FR 80076	Final Approval
REDESIGNATION TO MAINTENANCE
12/26/2018	OHIO	Cleveland, OH	83 FR 66200	Proposed Approval
04/12/2019	OHIO	Cleveland, OH	84 FR 14881	Final Approval
07/16/2019	PENNSYLVANIA	Delaware County, PA	84 FR 33886	Proposed Approval
07/16/2019	PENNSYLVANIA	Lebanon County, PA	84 FR 33886	Proposed Approval
09/30/2019	PENNSYLVANIA	Delaware County, PA	84 FR 51420	Final Approval
09/30/2019	PENNSYLVANIA	Lebanon County, PA	84 FR 51420	Final Approval
09/15/2021	IDAHO	West Silver Valley, ID	86 FR 51318	Proposed Approval
11/16/2021	IDAHO	West Silver Valley, ID	86 FR 63315	Final Approval
11/20/2025	PENNSYLVANIA	Allegheny County, PA	90 FR 52319	Proposed Approval