Chicago vs Houston

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

United States
Chicago
29
Good
United States
Houston
54
Moderate
MetricChicagoHouston
AQI2954
PM2.52.5 μg/m³7.1 μg/m³
PM102.5 μg/m³8.1 μg/m³
Ozone59 ppb37 ppb
NO212.9 ppb14 ppb

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