LANSING, Mich. — Statewide air monitors closed Michigan’s 2026 ozone season with a mostly clean report card: from March through October, monitors across most of the state stayed inside the federal ground-level ozone limit.
The Department of Environment, Great Lakes, and Energy said the season finished even though wildfire smoke sometimes clouded the air. Away from those episodes, the network pointed to ongoing gains from cleaner cars and fuels, newer pollution controls and earlier emission cuts.
Holland again posted the highest readings. Officials blame much of that spike on ozone-forming pollution riding across Lake Michigan from upwind states rather than on local plants alone.
Every other site, including the Detroit metro network, stayed in compliance. Regulators link southeast Michigan’s longer slide toward cleaner air to years of lower vehicle and factory emissions.
EGLE Director Phil Roos said the numbers show years of technology spending and partnerships paying off in healthier air. The agency will keep the monitors running, send Air Quality Alerts when needed and keep working with local partners. Current and past readings sit on the state MiAir pages. Background work on attainment also stresses that wildfire-influenced days are tracked carefully so long-term trends reflect pollution Michigan can control.
Filed under: Lansing MI Health News
