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Recent Updates: Federal Register Notices Published or Effective After February 28, 2026
Recent Updates: Federal Register Notices Published or Effective After February 28, 2026
Data is current as of March 12, 2026
is displayed for notices published or effective within 30 days of the report "As of" date.
Federal Register Notices not in this Green Book will be available in reports in the next Green Book.
The "FR" links below will display Federal Register Notices from the Government Publishing Office (GPO) website.
| NAAQS / Publication Date | Area Name / Action / Status / Effective Date / FRN Link |
| 8-Hour Ozone (2015) | |
| 01/29/2026 | Louisville, KY-IN (KY) |
| Redesignation to Maintenance | |
| Final Disapproval | |
| Effective: 03/02/2026 | |
| 91 FR 3838 | |
| 03/12/2026 | Berrien County, MI (MI) |
| Clean Data Determination/Attainment Determination | |
| Proposed Approval | |
| 91 FR 12123 | |
| 03/12/2026 | Muskegon County, MI (MI) |
| Clean Data Determination/Attainment Determination | |
| Proposed Approval | |
| 91 FR 12123 | |
| PM-2.5 (2006) | |
| 03/04/2026 | Klamath Falls, OR (OR) |
| Redesignation to Maintenance | |
| Proposed Approval | |
| 91 FR 10545 | |
| PM-2.5 (1997) | |
| 01/29/2026 | San Joaquin Valley, CA (CA) |
| Clean Data Determination/Attainment Determination | |
| Final Approval | |
| Effective: 03/02/2026 | |
| 91 FR 3836 | |
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