If the score is between 0 and 50, the air quality is considered good. If it is 51 to 100, the air quality is considered moderate or tolerable. A score of 101 to 150 is considered unhealthy for sensitive groups. 151 to 200 is considered unhealthy. If the score is 201 to 300, it is considered very unhealthy. Besides, if it is more than 301, it is considered hazardous.
Accordingly, Delhi's pollution score is 180—meaning the air there is unhealthy. Dhaka's pollution score is 82—meaning the air here is at a moderate or tolerable level.


