Air Plan Approval; Washington; Regional Haze Progress Report

The Environmental Protection Agency (EPA) is approving a revision to the regional haze State Implementation Plan (SIP) submitted by Washington on November 6, 2017. Washington submitted its Regional Haze Progress Report (``progress report'' or ``report'') and a negative declaration stating that further revision of the existing regional haze SIP is not needed at this time. Washington submitted both the progress report and the negative declaration in the form of implementation plan revisions as required by federal regulations. The progress report addresses the federal Regional Haze Rule requirements under the Clean Air Act to submit a report describing progress in achieving reasonable progress goals established for regional haze and a determination of the adequacy of the state's existing plan addressing regional haze.