AQI Returns to ‘Severe’

Delhi Air Pollution: AQI Returns to ‘Severe’ as Cold Wave Continues

Delhi's air quality has deteriorated again, with the Air Quality Index (AQI) slipping back into the ‘severe’ category at 427 by 7 am on Sunday, after briefly improving to ‘very poor.’ The Central Pollution Control Board (CPCB) classifies an AQI between 401 and 450 as ‘severe,’ with PM2.5 being the...