# Revisions to the Arizona State Implementation Plan, Maricopa County Air Quality Department and Maricopa County
> **Rule** · Direct final rule. · Published 2009-11-09 · Effective 2010-01-08 · 74 FR 57612
## Document
- **Document number:** E9-26861
- **Category:** air-emissions
- **Federal Register citation:** 74 FR 57612
- **CFR reference:** 40 CFR 52
- **Publication date:** 2009-11-09
- **Effective date:** 2010-01-08
- **State:** AZ
- **EPA docket:** EPA-R09-OAR-2009-0042
## Abstract

EPA is taking direct final action to approve a revision to the Maricopa County Air Quality Department (MCAQD) portion of the Arizona State Implementation Plan (SIP). These revisions concern PM-10 emissions from open outdoor fires and indoor fireplaces at commercial and institutional establishments, primary and secondary MCAQD ambient air quality standards, and residential woodburning devices. We are approving local rules under the Clean Air Act as amended in 1990 (CAA or the Act).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/11/09/E9-26861/revisions-to-the-arizona-state-implementation-plan-maricopa-county-air-quality-department-and)
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