New Delhi, Nov. 25 -- A thick layer of toxic smog engulfed the national capital on Tuesday morning as the average Air Quality Index (AQI) stood at 363 at 7 am, falling under the 'very poor' category despite the Graded Response Action Plan (GRAP)-III in effect across Delhi and the National Capital Region (NCR), according to the Central Pollution Control Board (CPCB).

A layer of thick smog engulfed several areas, showing little improvement from Monday morning's AQI of 396.

According to the CPCB, the Wazirpur area recorded an AQI of 400. The AQI in Anand Vihar was 401, which falls under the 'Severe' pollution category.

Bawana recorded the AQI level of 388 at 7 am, falling under the 'very poor' category. In contrast, NSIT Dwarka recorded a...