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Recent Updates: Federal Register Notices Published or Effective After January 31, 2026
Recent Updates: Federal Register Notices Published or Effective After January 31, 2026
Data is current as of January 31, 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) | |
| 01/06/2026 | Northern Wasatch Front, UT (UT) |
| Boundary Change | |
| Final Approval | |
| Effective: 02/05/2026 | |
| 91 FR 339 | |
| 01/29/2026 | Louisville, KY-IN (KY) |
| Redesignation to Maintenance | |
| Final Disapproval | |
| Effective: 03/02/2026 | |
| 91 FR 3838 | |
| 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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