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Recent Updates: Federal Register Notices Published or Effective After August 31, 2026
Recent Updates: Federal Register Notices Published or Effective After August 31, 2026
Data is current as of August 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) | |
| 08/13/2026 | St. Louis, MO-IL (IL) |
| Clean Data Determination/Attainment Determination | |
| Final Approval | |
| Effective: 09/14/2026 | |
| 91 FR 52246 | |
| 08/13/2026 | St. Louis, MO-IL (MO) |
| Clean Data Determination/Attainment Determination | |
| Final Approval | |
| Effective: 09/14/2026 | |
| 91 FR 52243 | |
| 8-Hour Ozone (1997) | |
| 08/13/2026 | Riverside County (Coachella Valley), CA (CA) |
| Clean Data Determination/Attainment Determination | |
| Final Approval | |
| Effective: 09/14/2026 | |
| 91 FR 52241 | |
| PM-2.5 (2012) | |
| 08/13/2026 | Plumas County, CA (CA) |
| Clean Data Determination/Attainment Determination | |
| Final Approval | |
| Effective: 09/14/2026 | |
| 91 FR 52249 | |
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