Delhi’s air quality continues to remain ‘severe’ as residents in the national capital woke up to toxic air conditions on Sunday. At 11am, Delhi’s AQI stood at 450, as per the Central Pollution Control Board.

According to CPCB measures, an AQI between zero and 50 is considered 'good', 51 and 100 'satisfactory', 101 and 200 'moderate', 201 and 300 'poor', 301 and 400 'very poor', 401 and 450 'severe' and above 450 'severe-plus'.