Approval and Promulgation of Air Quality Implementation Plans; Connecticut; Prevention of Significant Deterioration and Nonattainment New Source Review

The Environmental Protection Agency (EPA) is taking direct final action to fully approve revisions to the State of Connecticut's State Implementation Plan (SIP) relating to regulation of fine particulate matter (PM2.5) emissions within the context of EPA's Prevention of Significant Deterioration (PSD) regulations. EPA is also approving clarifications to the applicability section of Connecticut's Nonattainment New Source Review (NNSR) regulations. These revisions will be part of Connecticut's major stationary source preconstruction permitting programs, and are intended to align Connecticut's regulations with the federal PSD and NNSR regulations. This action is being taken in accordance with the Clean Air Act (CAA).