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Air Quality Action Days
Air Quality Action Days
Our meteorologists call Air Quality Action Days to protect you. These days are important for everyone, but especially for people with breathing problems like asthma as well as the elderly or young children.
On Air Quality Action Days, ozone levels may be harmful for your health. You may be thinking about the ozone layer - the natural invisible shield that helps protect us from the sun's harmful ultraviolet (UV) rays - we're not talking about that ozone. We're talking about harmful ground-level ozone.
Where does this harmful ground-level ozone come from?
Higher levels of ground-level ozone when the sun, weather, and certain pollutants all mix together just right. That usually happens around summertime (May - September), but that isn't the only time that we call Air Quality Action Days!
Harmful levels of fine particulates (really tiny dust) can happen any time during the year.
Typically we see that during winter months when we get really strong ground-level inversions (when pollutants have nowhere to go and stay trapped at the ground level).
Stay informed
These resources provide current air quality conditions and AQI ratings for cities and communities throughout the state.
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A street-level view of the Michigan State Capitol building in Lansing with smoky air and a warm orange hue from wildfire smoke
Part of our learn about air quality series
Learn more about air qualityAir quality affects the environment and your overall health in countless ways.
Find information about quality issues in Michigan, including air quality related actions open for input from the public.
The relationship between Air Quality Action Days, Ozone Action Days, and Clean Air Action Days
You may be more familiar with Ozone Action Days, which is an older term for Air Quality Action Days. This name was updated to include other fine particulate matter pollution (such as wildfire smoke) as well as ozone. For a period, Air Quality Action Days were also called Clean Air Action Days, though that term has also been retired.