The air pollution level in Karachi has been recorded at 192 particulate matter (PM).Lahore tops the list of the most polluted cities, with air pollution recorded at 287 particulate matter. New Delhi, the capital of India, is ranked second with 254 particulate matter pollution, while Mumbai is ranked fourth with 174 particulate matter pollution.

Delhi has received a respite from toxic air in the first two days of December as the city's AQI remained in the "poor" category on Monday, recording a reading of 280. The 24-hour average Air Quality Index (AQI) of the city was recorded at 280 at 4 pm,

The 24-hour average AQI at 4 pm was slightly lower than Sunday's 285. Since October 30, air quality had been in the ‘very poor’ and ‘severe’ categories.