# Approval and Promulgation of Air Quality Implementation Plans; Massachusetts; Determination of Attainment of the One-Hour Ozone Standard for the Springfield Area
> **Rule** · Final rule. · Published 2012-04-30 · Effective 2012-05-30 · 77 FR 25362
## Document
- **Document number:** 2012-10198
- **Category:** air-emissions
- **Federal Register citation:** 77 FR 25362
- **CFR reference:** 40 CFR 52
- **Publication date:** 2012-04-30
- **Effective date:** 2012-05-30
- **State:** MA
- **EPA docket:** EPA-R01-OAR-2012-0008
## Abstract

The EPA is making two separate and independent determinations. First, EPA is determining that the Springfield (Western Massachusetts) serious one-hour ozone nonattainment area did not meet the applicable deadline of December 31, 2003, for attaining the one-hour National Ambient Air Quality Standard (NAAQS) for ozone. This final 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 2001-2003 monitoring period. Second, EPA is determining that the Springfield (Western Massachusetts) 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 2009- 2011. The area first attained the one-hour NAAQS during the 2007-2009 monitoring period, and continued in attainment during the 2008-2010, and 2009-2011 monitoring periods.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/04/30/2012-10198/approval-and-promulgation-of-air-quality-implementation-plans-massachusetts-determination-of)
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