Houston vs Chicago

Live air quality comparison. Chicago has cleaner air right now.

United States
Houston
54
Moderate
United States
Chicago
29
Good
MetricHoustonChicago
AQI5429
PM2.57.1 μg/m³2.5 μg/m³
PM108.1 μg/m³2.5 μg/m³
Ozone37 ppb59 ppb
NO214 ppb12.9 ppb

Lower values mean cleaner air. Updated hourly. Sources: OpenAQ, Open-Meteo.