A thick layer of fog enveloped the national capital Saturday morning as the minimum temperature settled at 9.5 degrees Celsius, a notch above the season’s average. The air quality in Delhi was recorded in the severe category at 429 at 10.40 am.
An AQI between 0 and 50 is considered ‘good’, 51 and 100 ‘satisfactory’, 101 and 200 ‘moderate’, 201 and 300 ‘poor’, 301 and 400 ‘very poor’, and 401 and 500 ‘severe’.