EPA's Cross State Air Pollution Rule (CSAPR) Close-Out and Revised CSAPR Update

EPA published the final CSAPR Close-Out Rule

Maryland strongly disagreed that the CSAPR Close Out Rule fully addressed 20 states' interstate ozone transport obligations

The D.C. Circuit Court vacated the CSAPR Close Out Rule, and iin a separate decision, also remanded part of the CSAPR Update Rule in order for EPA to address ozone transport obligations by the upcoming 2021 attainment date.

EPA proposed the revised CSAPR Update

MDE submitted comments urging the EPA to immediately implement the Proposed Rule's NO_x budgets to provide those much needed NO_x emissions reductions, but also to correct the deficiencies of the Proposed Rule in order to fully address ozone transport obligations.

EPA finalized the Revised CSAPR Update for the 2008 ozone standard. EPA took some of MDE's suggestions into account in the final rule