Attainment Demonstrations for the 2015 Ozone NAAQS
Attainment demonstrations are required by the Clean Air Act (CAA) for areas classified moderate nonattainment or above. The Southwest Connecticut portion of the New York- N. New Jersey- Long Island Nonattainment Area was originally designated moderate nonattainment, while the Greater Connecticut Nonattainment Area was originally designated as marginal nonattainment based on monitored ozone levels. However, the original designation for Greater Connecticut underestimated the significant persistence of the ozone problem and the area was unable to attain the standard by the marginal attainment date and was thereby reclassified by EPA to moderate nonattainment on October 7, 2023. Connecticut's two nonattainment areas are now both classified as moderate nonattainment.Connecticut's Nonattainment Areas
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New York-N. New Jersey-Long Island, NY-NJ-CT
Connecticut Counties included: Fairfield, New Haven, Middlesex |
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Greater Connecticut Connecticut Counties included: Litchfield, Hartford, Tolland, Windham, New London |
Statewide Attainment Demonstration for Moderate Nonattainment
DEEP is submitting the SIP revision below to fulfill the requirements of an Attainment Demonstration for Southwest Connecticut's initial designation to moderate nonattainment, as well as Greater Connecticut's redesignation to moderate nonattainment for the 2015 ozone standard. The plan demonstrates that Connecticut has addressed requirements as outlined under the Clean Air Act (CAA) for moderate nonattainment areas. While Greater Connecticut is expected to attain the 2015 standard in 2023, Southwest Connecticut is unable to attain the 2015 standard without further emissions reductions from nearby upwind states.