NEW DELHI: Delhiās air quality improved for the second consecutive day on Thursday, though pollution levels continued to remain a concern. The cityās 24-hour average air quality index (AQI) stood at 234 at 4 pm, placing it in the āpoorā category, according to data from the Central Pollution Control Board (CPCB). The reading marked an improvement from an AQI of 271 recorded at the same time on Wednesday and a sharp recovery from the āsevereā level of 412 recorded on Tuesday.Of the 40 functional air quality monitoring stations in the capital, 10 reported āmoderateā air quality with AQI levels below 200. These included Lodhi Road, IIT Delhi, Indira Gandhi International Airport and Aya Nagar. Meanwhile, 27 stations continued to record air quality in the āpoorā category.Two stations ā Jahangirpuri and Bawana ā recorded āvery poorā air quality, with AQI levels crossing 300.Despite the recent improvement, forecasts indicate that air quality is likely to deteriorate to the āvery poorā category in the coming days.As per CPCB classification, an AQI between 0 and 50 is considered āgoodā, 51 to 100 āsatisfactoryā, 101 to 200 āmoderateā, 201 to 300 āpoorā, 301 to 400 āvery poorā and 401 to 500 āsevereā. Data from the Decision Support System (DSS) for Air Quality Management showed that vehicular emissions were the largest contributor to Delhiās pollution load on Wednesday, accounting for 18.5 per cent. Industries in Delhi and adjoining areas contributed 9.5 per cent, followed by construction activities at 2.5 per cent and waste burning at 1.6 per cent.Among NCR districts, Jhajjar in Haryana emerged as the highest contributor to Delhiās pollution at 17.6 per cent, followed by Rohtak at 5.9 per cent and Sonipat at 3.1 per cent.
Delhi air quality: AQI drops to 234, improvement from 'very poor' category; relief temporary
