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State of Wyoming v. EPA, et al

  1. August 16, 2023

    10th Circ. Revives Wyoming Haze Plan For PacifiCorp Plant

    The Tenth Circuit wiped out the U.S. Environmental Protection Agency's partial disapproval of Wyoming's regional haze plan, ruling the agency violated the Clean Air Act by treating non-binding agency guidelines as mandatory for smaller power plants.

  2. March 20, 2023

    EPA's Hands Are Tied On Haze Plan, Wyo. Tells 10th Circ.

    The Clean Air Act required the U.S. Environmental Protection Agency to approve Wyoming's plan to limit regional haze and the federal agency had no authority to swap in rules for parts of the plan it didn't like, the state told the Tenth Circuit on Friday.

  3. January 30, 2023

    EPA Tells 10th Circ. That Wyoming Haze Moves Were Proper

    The U.S. Environmental Protection Agency defended its partial approval of Wyoming's plan to limit regional haze, telling the Tenth Circuit that it abided by the Clean Air Act when it accepted the state's plan and put in place its own federal program to cover where the state lacked.

  4. October 31, 2022

    Green Groups, PacifiCorp Blast EPA Haze Moves At 10th Circ.

    Environmental groups on Friday told the Tenth Circuit that the U.S. Environmental Protection Agency approved an inadequate plan by Wyoming to limit regional haze, while PacifiCorp. said the agency wrongly rejected a pollution control proposal at the utility coal-fired power plant contributing to regional haze.

  5. October 26, 2022

    Regional Haze Plan Was Sufficient, Wyo. Tells 10th Circ.

    Wyoming on Tuesday told the Tenth Circuit that the U.S. Environmental Protection Agency wrongly rejected the state's proposal to control air pollution at a PacifiCorp. coal-fired power plant that contributes to regional haze, saying it did all the Clean Air Act required.