Kolkata vs Hanoi

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

India
Kolkata
121
Unhealthy for Sensitive Groups
Vietnam
Hanoi
148
Unhealthy for Sensitive Groups
MetricKolkataHanoi
AQI121148
PM2.551.9 μg/m³60.8 μg/m³
PM1064.5 μg/m³61 μg/m³
Ozone72 ppb68 ppb
NO215.5 ppb30.3 ppb

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