Approval and Promulgation of Air Quality Implementation Plans; District of Columbia; Regional Haze Five-Year Progress Report State Implementation Plan

The Environmental Protection Agency (EPA) is approving a revision to the District of Columbia state implementation plan (SIP) submitted by the District of Columbia (the District) through the District of Columbia Department of Energy and Environment (DOEE). The District's SIP submittal addresses requirements of the Clean Air Act (CAA) and EPA's rules that require states to submit periodic reports describing progress towards reasonable progress goals (RPGs) established for regional haze and a determination of the adequacy of the state's existing SIP addressing regional haze (regional haze SIP). No comments were received in response to EPA's proposed rulemaking action published on May 30, 2017. EPA is approving the District's SIP submittal because EPA has determined that it satisfactorily addresses the progress report and adequacy determination requirements for the first implementation period for regional haze.