# Approval and Promulgation of Air Quality Implementation Plans; Maryland; Attainment Demonstration for the 1997 8-Hour Ozone National Ambient Air Quality Standard for the Philadelphia-Wilmington-Atlantic City Moderate Nonattainment Area
> **Rule** · Final rule. · Published 2012-10-29 · Effective 2012-11-28 · 77 FR 65488
## Document
- **Document number:** 2012-26394
- **Category:** air-emissions
- **Federal Register citation:** 77 FR 65488
- **CFR reference:** 40 CFR 52
- **Publication date:** 2012-10-29
- **Effective date:** 2012-11-28
- **State:** MD
- **EPA docket:** EPA-R03-OAR-2008-0929
## Abstract

EPA is approving the attainment demonstration portion of the attainment plan submitted by the State of Maryland as a State Implementation Plan (SIP) revision. The Maryland SIP revision demonstrates attainment of the 1997 8-hour ozone national ambient air quality standard (NAAQS) for the Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE moderate nonattainment area (Philadelphia Area) by the applicable attainment date of June 2011. EPA is approving the SIP revision in accordance with the requirements of the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/10/29/2012-26394/approval-and-promulgation-of-air-quality-implementation-plans-maryland-attainment-demonstration-for)
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