New Delhi, Feb. 15 -- The air quality in the national capital slipped to 'poor' category, with the Air Quality Index (AQI) recorded at 221 around 7 am on Sunday, as per the Central Pollution Control Board (CPCB), being marginally worse than the 197 AQI recorded on Saturday.

Several areas in Delhi recorded concerning AQI levels, Mundka at 275, followed by Anand Vihar (265), Bawana (241), Rohini (250), Dwarrka (221), ITO Delhi (213), Ashok Vihar (243), Jawaharlal Nehru Stadium (265) Vivek Vihar (252), and Chandani Chowk (228), according to the Central Pollution Control Board (CPCB).

According to CPCB, the AQI, which ranges from 0 to 500, is divided into six categories, each reflecting the level of pollution and associated health risks.

T...