Houston vs Chicago

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

United States
Houston
53
Moderate
United States
Chicago
61
Moderate
MetricHoustonChicago
AQI5361
PM2.511.2 μg/m³14.2 μg/m³
PM1015 μg/m³14.5 μg/m³
Ozone107 ppb86 ppb
NO23.2 ppb25.8 ppb

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