A toxic haze continued to shroud Delhi on Thursday morning as the air quality remained in the “severe” category.

At 8.05 am, the Air Quality Index in 27 out of the 39 monitoring stations in the national capital was above 400 or “severe”, the Sameer application, which provides hourly updates published by the Central Pollution Control Board, showed.

The average Air Quality Index in Delhi stood at 405.

An index value between 0 and 50 indicates “good” air quality, between 51 and 100 indicates “satisfactory” air quality and between 101 and 200 indicates “moderate” air quality. As the index value increases further, air quality deteriorates. A value of 201 and 300 means “poor” air quality, while between 301 and 400 indicates “very poor” air.

Between 401 and 450 indicates “severe” air po

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