Chicago, IL air quality today.
Chicago air quality can shift with lake winds, ozone, traffic, and wildfire smoke. Review current AQI and PM2.5 before outdoor plans.
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How to use this Chicago, IL air quality page
Check the live AQI first, then look at PM2.5 and ozone. If the recommendation shows unhealthy conditions, reduce prolonged outdoor exertion, close windows when appropriate, and follow official local health guidance.
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