India, Oct. 23 -- The Air Quality Index of Delhi remained in the 'Very Poor' category for the fourth day straight, according to the Central Pollution Control Board (CPCB). The national capital recorded an AQI of 332 at 6 am on October 23, days after the city celebrated a cracker-filled Diwali.

Earlier on Wednesday, the city's overall 24-hour average air quality stood at 353 at 4 pm on Wednesday, according to data by CPCB. This marked the highest AQI recorded so far this season, up from 351 on Tuesday and 345 on Monday.

The AQI in Gurugram's Sector 51 was recorded as 288, while in Indirapuram, Ghaziabad, it was 271. In Noida's Sector 125, the air quality was recorded at 308 in the Very Poor category.

A cloud of smog shrouded the city du...