# Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Carbon Monoxide Second Limited Maintenance Plan for the Pittsburgh Area
> **Rule** · Direct final rule. · Published 2014-03-27 · Effective 2014-05-27 · 79 FR 17054
## Document
- **Document number:** 2014-06697
- **Category:** air-emissions
- **Federal Register citation:** 79 FR 17054
- **CFR reference:** 40 CFR 52
- **Publication date:** 2014-03-27
- **Effective date:** 2014-05-27
- **State:** PA
- **EPA docket:** EPA-R03-OAR-2012-0248
## Abstract

The Environmental Protection Agency (EPA) is taking direct final action to approve a State Implementation Plan (SIP) revision submitted by the Commonwealth of Pennsylvania. The revision consists of a second limited maintenance plan for the carbon monoxide (CO) Pittsburgh Area ("the Pittsburgh Area" or "the Area") in Allegheny County, formerly designated as a CO nonattainment area. The maintenance plan ensures maintenance of the CO national ambient air quality standard (NAAQS) in the Pittsburgh Area for a second 10-year period after redesignation of the Area from nonattainment to attainment, through year 2022. EPA is approving these revisions in accordance with the requirements of the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2014/03/27/2014-06697/approval-and-promulgation-of-air-quality-implementation-plans-pennsylvania-carbon-monoxide-second)
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