Air Plan Approval; KY; Revisions to Ambient Air Quality Standards

The Environmental Protection Agency (EPA) is taking final action to approve the State Implementation Plan (SIP) submission submitted by the Commonwealth of Kentucky, through the Kentucky Division for Air Quality (KDAQ), on September 9, 2016. The changes to the SIP that EPA is taking final action to approve pertain to changes to the Commonwealth's air quality standards for carbon monoxide (CO), lead (Pb), nitrogen dioxide (NO2), ozone, particulate matter (both PM10 and PM2.5), and sulfur dioxide (SO2) to reflect the historical and current National Ambient Air Quality Standards (NAAQS). EPA has determined that the September 9, 2016, SIP revision is consistent with the Clean Air Act (CAA or Act). KDAQ's submission also included additional air quality standards for hydrogen sulfide, fluorides, and odor; however, EPA is not approving these state standards into the SIP.