India, Nov. 7 -- The air in the national capital turned 'hazardous' on Friday morning as a thick layer of smog blanketed the city. The overall AQI of Delhi was recorded at 433, as of 9 am, according to data from Swiss monitor IQ Air, which it says is 'hazardous'. Just hours earlier, Delhi's overall AQI was a whopping 727, according to IQ Air data.

However, according to the Central Pollution Control Board, Delhi's AQI stood at 309, as of 9 am, making the air quality in the national capital 'very poor'.

Among the worst affected areas in Delhi, according to IQ Air, are Bawana, with an AQI of 784, and Chandni Chowk, with an AQI of 730, as of 9 am.

This is followed by Rohini in north-west Delhi, where the AQI stood at 629, and Narela, with ...