Delhi: ‘Severe’ air pollution recorded at 16 of city’s 37 monitoring stations

Sixteen of the 37 air quality monitoring stations in Delhi recorded Air Quality Index readings above 400, categorised as “severe”, at 12.05 pm on Friday, 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 391, placing it in the “very poor” category, the data showed.

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 anythi