Data / Federal rules / 2026-00194

Air Plan Approval; California; Mojave Desert Air Quality Management District; Definition of Terms

The Environmental Protection Agency published this final rule in the Federal Register on January 8, 2026. It took effect on February 9, 2026.

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What the agency says

The Environmental Protection Agency (EPA) is taking final action to approve a revision to the Mojave Desert Air Quality Management District (MDAQMD) portion of the California State Implementation Plan (SIP). The revision concerns definitions that are necessary to implement and enforce local rules that regulate air pollution under the Clean Air Act (CAA or the "Act"). We are also approving the rescission of earlier versions of this rule from the California SIP as they are no longer needed under the CAA.

Key facts

Document number: 2026-00194
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: January 8, 2026
Takes effect: February 9, 2026
Dates: This rule is effective February 9, 2026.
Docket: EPA-R09-OAR-2022-0858; FRL-10563-02-R9
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Environmental protection; Incorporation by reference; Intergovernmental relations; Ozone; Particulate matter; Reporting and recordkeeping requirements; Volatile organic compounds
Pages: 3

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on environmental protection · Rules on incorporation by reference · Published in January 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.