Determination of Attainment by the Attainment Date and Clean Data Determination; California, San Joaquin Valley 1997 Annual PM2.5 Fine Particulate Matter Nonattainment Area
Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register Jan. 29, 2026. Document 2026-01766. Updated Nov. 15, 2026.
- What it does
The Environmental Protection Agency (EPA) is finalizing our determination that the San Joaquin Valley, California, fine particulate matter (PM<INF>2.5</INF>) nonattainment area attained the 1997 annual PM<INF>2.5</INF> national ambient air quality standards (NAAQS) by the December 31, 2024 applicable attainment date. This determination is based on ambient air quality monitoring data from 2022 through 2024. We are also making a clean data determination (CDD) based on the 2022 through 2024 data and our evaluation of preliminary air quality monitoring data from 2025.
The Environmental Protection Agency's summary, as published in the Federal Register.
- What changed in the regulation
1 part of Title 40 of the Code of Federal Regulations:
Wording on eCFR: the day before it took effect and from the day it took effect (first part listed).
- Compared with
The Environmental Protection Agency has published 248 final rules in 2026 so far, compared with 263 in all of 2025.
Counted by the Tribune from Federal Register records since Jan. 1, 2025.
- What happens next and when
This rule is effective March 2, 2026.
The agency's dates, word for word.
The record as published
| Document number | 2026-01766 |
|---|---|
| Action | Final rule. |
| Agencies | Environmental Protection Agency |
| Published | Jan. 29, 2026 |
| Effective date | March 2, 2026 |
| Docket | EPA-R09-OAR-2025-0292 |
Source: the Federal Register (public domain). The document in the Federal Register