IIT Delhi recorded the highest AQI at 418, followed by NSUT Jaffarpur at 414. North Campus was also close to the severe mark at 399, as of 11:30 am. PM2.5 was the leading pollutant at 47 of the 57 reporting stations. Delhi's air quality deteriorated further on Thursday, November 12, with the city's overall Air Quality Index rising to 326 from the previous day, remaining in the ‘very poor’ category, according to.