Chicago — Air Quality

United States, North America. US AQI: 37 (Good). Air Quality Score: 86.6/100. Dominant pollutant: PM2.5.

Last updated: · Updated hourly

Quanteta Scores

US AQI 0 Rank 10 / 50
Air Quality Score 0/100 Rank 23 / 50
Breathability 0/100 Rank 25 / 50

City Info

City ID
aq-chicago
Country
United States (US)
Region
North America
Population
2,700,000
Coordinates
41.8781, -87.6298
Timezone
America/Chicago
AQI Level
Good
EU AQI
22
Dominant Pollutant
PM2.5
Measured At
2026-05-24T08:00Z

Pollutant Concentrations

Pollutant Concentration
PM2.5 Dominant 11.7 μg/m³
PM10 11.8 μg/m³
O3 56.0 μg/m³
NO2 21.5 μg/m³
SO2 2.8 μg/m³
CO 218.0 μg/m³
PM2.5: 3.6% PM10: 3.7% O3: 17.4% NO2: 6.7% SO2: 0.9% CO: 67.7% Air Quality
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