Chicago vs Houston

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

United States
Chicago
61
Moderate
United States
Houston
54
Moderate
MetricChicagoHouston
AQI6154
PM2.54.1 μg/m³16.1 μg/m³
PM104.2 μg/m³22.6 μg/m³
Ozone107 ppb106 ppb
NO26.1 ppb2.8 ppb

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