Chicago Air Quality Reaches Hazardous Levels

Why it matters locally: Elevated air pollution levels, similar to those seen in Chicago, have occasionally impacted Michigan due to wildfire smoke traveling across the region, potentially affecting respiratory health for sensitive groups in the state.

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Chicago's air quality has reached a hazardous classification, according to recent data. The Air Quality Index (AQI) for the city registered at 358. This current figure represents a notable increase compared to Chicago's average AQI of 52 in 2019, which registered as "moderate." Officials have issued smoke advisories. The current air quality conditions pose risks for millions of residents in the region, primarily due to wildfire smoke. Localized data indicates specific pollutant measurements. PM2.5 levels registered as "unhealthy for sensitive groups" (USG) in Chicago. Decatur also reported PM2.5 levels as "moderate."