# Air Plan Approval; California; Mojave Desert Air Quality Management District
> **Rule** · Final rule. · Published 2023-06-02 · Effective 2023-07-03 · 88 FR 36249
## Document
- **Document number:** 2023-11683
- **Category:** air-emissions
- **Federal Register citation:** 88 FR 36249
- **CFR reference:** 40 CFR 52
- **Publication date:** 2023-06-02
- **Effective date:** 2023-07-03
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2021-0923
## Abstract

The Environmental Protection Agency (EPA) is taking final action to approve a revision to the Mojave Desert Air Quality Management District (MDAQMD or "District") portion of the California State Implementation Plan (SIP). This revision concerns emissions of oxides of nitrogen (NO<INF>X</INF>) from Portland cement kilns. We are approving a local rule that regulates these emission sources under the Clean Air Act (CAA or the Act). Approving this rule corrects a deficiency identified in MDAQMD's reasonably available control technology (RACT) demonstrations for the 1997 8-hour ozone National Ambient Air Quality Standards (NAAQS) and the 2008 8-hour ozone NAAQS.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2023/06/02/2023-11683/air-plan-approval-california-mojave-desert-air-quality-management-district)
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