The EPA promulgated the original Cross-State Air Pollution Rule (original CSAPR) on August 8, 2011 (U.S. EPA, 2011), to address interstate transport of ozone pollution under the 1997 Ozone NAAQS.1 The primary purpose of this Cross-State Air Pollution Rule Update (CSAPR Update) is to address interstate air quality impacts with respect to the 2008 Ozone National Ambient Air Quality Standards (NAAQS). Specifically, this CSAPR Update will reduce ozone season emissions of oxides of nitrogen (NOX) in 22 eastern states that can be transported downwind as NOX or, after transformation in the atmosphere, as ozone and contribute significantly to nonattainment or interfere with maintenance of the 2008 Ozone NAAQS in downwind states. For the 22 eastern states affected by this rule, the EPA is issuing Federal Implementation Plans (FIPs) that generally provide updated CSAPR NOX ozone season emission budgets for electric generating units (EGUs) and is implementing these emission budgets via modifications to the CSAPR NOX ozone season allowance trading program. The CSAPR Update is also intended to respond to the D.C. Circuit's July 28, 2015, remand of certain CSAPR NOX ozone season emission budgets to the EPA for reconsideration. This Regulatory Impact Analysis (RIA) presents the health and welfare benefits and climate co-benefits of the CSAPR Update, and compares the benefits to the estimated costs of implementing the CSAPR Update for the 2017 analysis year. This RIA also reports certain other impacts of the CSAPR Update, such as its effect on employment and energy prices. This executive summary explains the analytic approach taken in the RIA and summarizes the RIA results.

EPA project officer: Kathy Kaufman. Updating EPA-452/P-14-006 "Regulatory impact analysis of the proposed revisions to the national ambient air quality standards for ground-level ozone." "September 2016." Includes bibliographical references. "EPA 452-R-16-004."