Twenty-three of 39 air quality monitoring stations in Delhi recorded Air Quality Index reading above 400, categorised as “severe”, at 11.06 am on Sunday, according to data from the Sameer application, which provides hourly updates from the Central Pollution Control Board.

The overall AQI for the national capital stood at 389, placing it in the “very poor” category, the data showed.

Among the areas reporting the highest pollution levels were Bawana (441), Rohini and Jahangirpuri (434), Mundka (431) and RK Puram (422).

On Saturday, the city’s average AQI at 7 am was 335, also in the “very poor” category, according to the Central Pollution Control Board.

An index value between 0 and 50 indicates “good” air quality, between 51 and 100 indicates “satisfactory” air quality and between 101 an

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