# Determination of Failure To Attain by 2005 and Determination of Current Attainment of the 1-Hour Ozone National Ambient Air Quality Standards in the Baltimore Nonattainment Area in Maryland
> **Rule** · Final rule. · Published 2012-06-12 · Effective 2012-07-12 · 77 FR 34810
## Document
- **Document number:** 2012-14141
- **Category:** air-emissions
- **Federal Register citation:** 77 FR 34810
- **CFR reference:** 40 CFR 52
- **Publication date:** 2012-06-12
- **Effective date:** 2012-07-12
- **State:** MD
- **EPA docket:** EPA-R03-OAR-2011-0680
## Abstract

EPA is issuing two separate and independent final determinations related to the Baltimore 1-hour ozone nonattainment area. First, EPA is determining that the Baltimore area previously failed to attain the 1-hour ozone National Ambient Air Quality Standard (NAAQS) by its applicable attainment deadline of November 15, 2005 (based on complete, quality-assured and certified ozone monitoring data for 2003-2005). Second, EPA is also determining that the Baltimore area is currently attaining the now revoked 1-hour ozone NAAQS based on complete, quality-assured and certified ozone monitoring data for 2008- 2010 and continuing for 2009-2011. Thus, quality-assured ozone monitoring data in the Air Quality System (AQS) show that the area has been attaining the revoked 1-hour ozone standard since 2008. EPA's determination that the area has attained the 1-hour ozone standard obviates the need for submission of any contingency measures for failure to attain that revoked standard.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/06/12/2012-14141/determination-of-failure-to-attain-by-2005-and-determination-of-current-attainment-of-the-1-hour)
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