Kolkata vs Hanoi

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

India
Kolkata
56
Moderate
Vietnam
Hanoi
167
Unhealthy
MetricKolkataHanoi
AQI56167
PM2.57.9 μg/m³29 μg/m³
PM1010.4 μg/m³29.3 μg/m³
Ozone84 ppb200 ppb
NO22.2 ppb2.3 ppb

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