Delhi: 23 of 39 monitoring stations record AQI above 400 in ‘severe’ category
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 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 pollution, while anything above the 450 threshold is termed “severe plus”.
Air quality deteriorates sharply in the winter months in Delhi, which is often ranked the world’s most polluted capital.
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