Delhi's air quality continued to dwell in the "very poor" category for the sixth consecutive day, with an AQI reading of 351 observed on Thursday morning. The city's residents awoke to a hazy morning as the temperature dropped to 16.3 degrees Celsius. Data from the Indian Institute of Tropical Meteorology Pune revealed that the primary contributors to PM 2.5 levels over the past two days were the city's transportation sector and emissions from other regions within the NCR, according to media reports.