Sections 110(a)(1) and (2) of the Clean Air Act (CAA) require all states to submit any necessary revisions to their State Implementation Plans (SIPs) to provide for the implementation, maintenance and enforcement of any revised or new national ambient air quality standard (NAAQS). Such revisions are commonly referred to as "infrastructure SIPs." The U.S. Environmental Protection Agency (EPA) revised the ozone NAAQS March 2008 and completed the designation process to identify non-attainment areas in July 2012. The Connecticut Department of Energy and Environmental Protection (DEEP) subsequently submitted Connecticut's infrastructure SIP on December 28, 2012.

This current SIP revision supplements DEEP's December 2012 submittal, further addressing the CAA §110(a)(2)(D)(i)(I) (i.e. good neighbor) requirements to demonstrate that emissions from sources in Connecticut do not contribute significantly to nonattainment in, or interfere with maintenance by, any other state with respect to the 2008 ozone NAAQS. DEEP's analysis of EPA modeling, recent ozone monitoring data and projected future Connecticut emission trends demonstrates that Connecticut meets its good neighbor requirements for the 2008 ozone NAAQS.

EPA Completeness Determination (PDF) 

2008 Ozone- Good Neighbor Submission to EPA (PDF)

Notice of Public Comment Period (PDF)

Good Neighbor SIP Technical Support Document for the 2008 Ozone NAAQS (PDF)