New Delhi, Oct  30: The national capital Delhi was again enveloped in dense fog on Thursday morning after Diwali, further worsening its air quality.

The air quality, which had been in the "poor" category for several days, has now deteriorated to the "very poor" level. Pollutants are trapped in the dense fog and air, making the city's air quality "very poor".

At 8 am, Delhi's overall Air Quality Index (AQI) reached 357, up from 279 yesterday.

According to Central Pollution Control Board (CPCB) data, Anand Vihar recorded an AQI of 408 and Vivek Vihar 415, which are considered "severe".

Other areas reporting alarming levels include Ashok Vihar (388), Aya Nagar (331), Bawana (387), Burari Crossing (369), Dwarka Sector-8 (371), IGI Airport T3 (320), ITO (370), Lodhi Road (334), Mundka (364), Najaf (364), Najaf (364), (368), Patparganj (386), RK Puram (374) and Siri Fort (381) - all of which fall under the "very poor" category.

The air quality in Delhi has deteriorated to a very poor level, with the government initiating cloud seeding in some parts of the city to bring the weather under control. The national capital, which is choked by the annual blanket of toxic smog, is waiting for rains.

This decision was made on the grounds that if it rains, there may be a slight improvement in air quality.