NACAA Comments on Proposed RHR Revisions

August 10, 2016 – NACAA submitted comments to EPA on the agency’s proposed revisions to the 1999 Regional Haze Rule (RHR), intended to "streamline, strengthen, and clarify" various aspects of the program, under which states are required to set goals and emission reduction strategies to improve visibility in federal Class I areas.  Among the specific proposed revisions to which NACAA responded are ones to 1) extend by three years, from July 31, 2018 to July 31, 2021, the State Implementation Plan (SIP) submittal deadline for the second regional haze planning period; 2) remove the requirement that interim progress reports be in the form of a SIP revision; 3) replace the recurring process of assessing reasonably attributable visibility impairment (RAVI) with an as-needed approach and extend the applicability of RAVI to all states, rather than only those with Class I areas; 4) require that states consult with Federal Land Managers earlier in the SIP development process and 5) determine how days are selected for tracking progress.  EPA expects to issue final revisions to the RHR this fall.