Chicago — Air Quality

United States, North America. US AQI: 35 (Good). Air Quality Score: 85.6/100. Dominant pollutant: NO2.

Last updated: · Updated hourly

Quanteta Scores

US AQI 0 Rank 5 / 50
Air Quality Score 0/100 Rank 26 / 50
Breathability 0/100 Rank 27 / 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
21
Dominant Pollutant
NO2
Measured At
2026-05-24T14:00Z

Pollutant Concentrations

Pollutant Concentration
PM2.5 12.3 μg/m³
PM10 12.9 μg/m³
O3 53.0 μg/m³
NO2 Dominant 25.9 μg/m³
SO2 2.6 μg/m³
CO 184.0 μg/m³
PM2.5: 4.2% PM10: 4.4% O3: 18.2% NO2: 8.9% SO2: 0.9% CO: 63.3% Air Quality
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