New Delhi, Nov. 9 -- Pollution filled Delhi's air as the air quality index a day after Diwali touched the 'severe' category in parts of the national capital. In the early hours on Monday, around 4:20 am, the air quality station at ITO recorded an alarming AQI of 406, according to data shared by the Central Pollution Control Board (CPCB).

The air quality deteriorated while Stage III of the Graded Response Action Plan (GRAP) is in force across Delhi-NCR.

Rajiv Chowk clocked an AQI of 381 at 1:30 am, while the area surrounding South Extension registered an AQI of 360 at 4:00 am.

The overall air quality in Delhi remained in the 'Very Poor' air quality bracket, at 366, around 7 am on Monday, according to the Commission for Air Quality Manag...