Approval and Promulgation of Air Quality Implementation Plans; New Hampshire; Determination of Attainment of the 1997 Ozone Standard

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The EPA is proposing to determine that the Boston-Manchester- Portsmouth (SE), New Hampshire moderate 1997 8-hour ozone nonattainment area continues to attain the 1997 8-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 has monitored attainment of the 1997 8-hour ozone NAAQS for the 2007-2009 monitoring period. Preliminary data available through June 15, 2010 also are consistent with continued attainment. In addition, in accordance with the Clean Air Act, EPA is proposing to determine that this area has attained the 1997 ozone NAAQS as of June 15, 2010, its applicable attainment date.