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Michigan Requests EPA Exclude Wildfire Ozone Data

12/17/2025

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Story summary
  • The Michigan Department of Environment, Great Lakes and Energy (EGLE) asks U.S. Environmental Protection Agency (EPA) to exclude 2023 and 2025 ozone readings linked to Canadian wildfire smoke, arguing they inflate levels.
  • If the EPA excludes the readings, Berrien and Muskegon could be redesignated as meeting federal ozone standards, and Allegan County would remain under stricter regulations.
  • Currently, Berrien and Muskegon are in "serious" non-attainment due to previous ozone violations.