Sierra Club v. United States Envtl. Prot. Agency, No. 12-3143 (7th Cir. 2014)
Annotate this CaseSierra Club challenged the Environmental Protection Agency’s decisions to redesignate three geographic areas—Milwaukee-Racine, Greater Chicago, and the Illinois portion of the St. Louis area—as having attained the 1997 National Ambient Air Quality Standards for ozone under the Clean Air Act, 42 U.S.C. 7401. The CAA mandates that before redesignating an area, EPA must confirm not just that ozone in an area dropped below a certain level, but also that the improvement in air quality resulted from “permanent and enforceable reductions in emissions.” EPA interprets that edict to require a finding that the requisite ozone drops are “reasonably attributable” to permanent and enforceable reductions. Sierra Club argued that the Agency acted arbitrarily and capriciously in making this causation finding in each of the redesignations. The Seventh Circuit denied a petition for review. EPA demonstrated that it “examined the relevant data and articulated a satisfactory explanation for its action including a rational connection between the facts found and the choice made, that the Agency’s decision was based on a consideration of the relevant factors, and that the Agency has made no clear error of judgment.”
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