# Approval and Promulgation of Air Quality Implementation Plans; Connecticut; Determination of Attainment of the One-Hour Ozone Standard for the Greater Connecticut Area
> **Rule** · Final rule. · Published 2012-03-16 · Effective 2012-04-16 · 77 FR 15607
## Document
- **Document number:** 2012-6424
- **Category:** air-emissions
- **Federal Register citation:** 77 FR 15607
- **CFR reference:** 40 CFR 52
- **Publication date:** 2012-03-16
- **Effective date:** 2012-04-16
- **State:** CT
- **EPA docket:** EPA-R01-OAR-2010-0380
## Abstract

The EPA is determining that the Greater Connecticut serious one-hour ozone nonattainment area did not meet the applicable deadline of November 15, 2007, for attaining the one-hour National Ambient Air Quality Standard (NAAQS) for ozone. This determination is based upon complete, quality-assured, certified ambient air monitoring data that show the area had an expected ozone exceedance rate above the level of the now revoked one-hour ozone NAAQS for the 2005-2007 monitoring period. Separate from and independent of this determination, EPA is also determining that the Greater Connecticut serious one-hour ozone nonattainment area currently attains the now revoked one-hour NAAQS for ozone, based upon complete, quality-assured, certified ambient air monitoring data for 2008-2010. The area first attained the one-hour NAAQS during the 2006-2008 monitoring period, and continued in attainment during the 2007-2009, and 2008-2010 monitoring periods. Quality assured and quality controlled, but not yet certified ozone data available for 2011 indicate that the area continues to attain the one-hour NAAQS. These determinations are made under the Clean Air Act.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/03/16/2012-6424/approval-and-promulgation-of-air-quality-implementation-plans-connecticut-determination-of)
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