The Air Quality Index in several parts of Delhi remained in the “very poor” category on Tuesday morning, a day after Diwali festivities.

The average AQI at 7.05 am stood at 350, which is categorised as “very poor”, according to data from the Sameer application, which provides hourly updates published by the Central Pollution Control Board.

However, the AQI in several areas was in the “severe” category, including Bawana, where the index stood at 423, Jahangirpuri at 407 and Wazirpur at 408.

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 betwe

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