Data / Federal rules / 2026-11168
Conditional Approval; Contingency Measure State Implementation Plan for the 2008 Ozone Standards; San Joaquin Valley, California
The Environmental Protection Agency published this final rule in the Federal Register on June 4, 2026. It took effect on July 6, 2026.
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What the agency says
The Environmental Protection Agency (EPA) is taking final action to conditionally approve a state implementation plan (SIP) submission under the Clean Air Act (CAA or "Act") that addresses the contingency measure requirements for the 2008 ozone national ambient air quality standards (NAAQS or "standards") for the San Joaquin Valley ozone nonattainment area. The SIP submission, titled the "Ozone Contingency Measure State Implementation Plan Revision for the 2008 and 2015 8-hour Ozone Standards" ("2024 SJV Ozone Contingency Measure Plan," "Contingency Measure Plan," or "Plan") relies on two ozone contingency measures that the EPA has already approved in separate rulemakings. The approval is conditional because it relies on commitments by the State air agency and regional air district to supplement the 2024 SJV Ozone Contingency Measure Plan with submission of specific additional contingency measures within one year of the EPA's final conditional approval. The EPA is taking final conditional approval action of the SIP submission because the Agency has determined that the existing approved contingency measures, the commitments to submit additional contingency measures, and the justification for not adopting contingency measures that would achieve the recommended amount for such measures, meet the applicable requirements for such SIP submissions for the San Joaquin Valley for the 2008 ozone NAAQS. This conditional approval adds the 2024 SJV Ozone Contingency Measure Plan to the federally enforceable California SIP.
Key facts
- Document number
- 2026-11168
- Type
- Final rule
- Action
- Final rule
- Agency
- Environmental Protection Agency
- Published
- June 4, 2026
- Takes effect
- July 6, 2026
- Dates
- This rule is effective July 6, 2026.
- Docket
- EPA-R09-OAR-2024-0338; FRL-12118-04-R9
- Code of Federal Regulations
- 40 CFR 52
- Topics
- Air pollution control; Environmental protection; Incorporation by reference; Intergovernmental relations; Nitrogen oxides; Ozone; Reporting and recordkeeping requirements; Volatile organic compounds
- Pages
- 18
Other documents from the Environmental Protection Agency
Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on environmental protection · Rules on incorporation by reference · Published in June 2026
Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.