New Delhi, Dec. 28 -- The air quality in the national capital remains hazardous, affecting people's health. The overall Air Quality Index (AQI) in Delhi on Sunday reached 391, entering the severe category, with some regions exceeding 400, according to the Central Pollution Control Board (CPCB).

Thick smog and fog trap pollutants, reducing visibility and disrupting daily life as Delhi residents faced the morning chill.

Anand Vihar recorded an AQI of 445; Patparganj, 425; Nehru Nagar, 433; Shadipur, 445; Mundka, 413; and IGI Airport, 320, indicating severe pollution across the region.

According to CPCB categorisation, AQI readings between 0-50 is 'good', 51-100 'satisfactory', 101-200 'moderate', 201-300 'poor', 301-400 'very poor', and ...