Air quality in India's capital, Delhi, remained in the ‘severe’ category on Friday, with pollution levels exceeding 450 at some monitoring stations, according to official data, Anadolu reports. Photo credit: Anadolu According to real-time data from the Central Pollution Control Board (CPCB), one monitoring station recorded an Air Quality Index (AQI) of 488 out of 500 on Friday morning, while several others in the capital recorded readings hovering above 400 by the.