# Approval and Promulgation of Air Quality Implementation Plans; Massachusetts and New Hampshire; Determination of Attainment of the One-Hour and 1997 Eight-Hour Ozone Standards for Eastern Massachusetts
> **Rule** · Final rule. · Published 2012-05-29 · Effective 2012-06-28 · 77 FR 31496
## Document
- **Document number:** 2012-12505
- **Category:** air-emissions
- **Federal Register citation:** 77 FR 31496
- **CFR reference:** 40 CFR 52
- **Publication date:** 2012-05-29
- **Effective date:** 2012-06-28
- **State:** MA
- **EPA docket:** EPA-R01-OAR-2011-0879
## Abstract

The EPA is making three separate and independent determinations. First, the EPA is determining that the Boston-Lawrence- Worcester (Eastern Massachusetts), MA-NH serious one-hour ozone nonattainment area met the applicable deadline of November 15, 2007, 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 attained the level of the now revoked one-hour ozone NAAQS for the 2005-2007 monitoring period. Second, EPA is determining that the Boston-Lawrence-Worcester (Eastern Massachusetts) moderate 1997 eight- hour ozone nonattainment area attained the 1997 eight-hour NAAQS for ozone by its applicable attainment date (June 15, 2010), based upon complete, quality-assured, certified ambient air monitoring data for the 2007-2009 monitoring period. Third, EPA is determining that the Boston-Lawrence-Worcester (Eastern Massachusetts) moderate 1997 eight- hour ozone nonattainment area has attained the 1997 eight-hour NAAQS for ozone, based upon complete, quality-assured, certified ambient air monitoring data for 2008-2010 monitoring period, and continuing through 2011. Under the provisions of EPA's ozone implementation rule, the requirements for this area to submit an attainment demonstration, a reasonable further progress plan, contingency measures, and other planning State Implementation Plans related to attainment of the 1997 eight-hour ozone NAAQS shall be suspended for so long as the area continues to attain the 1997 ozone NAAQS.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/05/29/2012-12505/approval-and-promulgation-of-air-quality-implementation-plans-massachusetts-and-new-hampshire)
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