Houston vs Chicago

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

United States
Houston
42
Good
United States
Chicago
40
Good
MetricHoustonChicago
AQI4240
PM2.53.2 μg/m³10.8 μg/m³
PM103.6 μg/m³11.7 μg/m³
Ozone98 ppb66 ppb
NO24.2 ppb13.1 ppb

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