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Levels of Air quality index.
Good
0-50
Unhealthy
201-300
Moderate
51-100
Severe
301-400
Poor
101-200
Hazardous
401-500
Big cities of the world.
Real-time air quality levels in big cities around the world.
New YorkUnited States
4 AQI (IN)
TorontoCanada
28 AQI (IN)
LondonUnited Kingdom
24 AQI (IN)
MelbournAustralia
15 AQI (IN)
JohannesburgSouth Africa
79 AQI (IN)
