Houston vs Chicago

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

United States
Houston
54
Moderate
United States
Chicago
61
Moderate
MetricHoustonChicago
AQI5461
PM2.516.1 μg/m³4.1 μg/m³
PM1022.6 μg/m³4.2 μg/m³
Ozone106 ppb107 ppb
NO22.8 ppb6.1 ppb

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