Delhi emerged as the most polluted city in India, recording an average PM2.5 level of 243.3 micrograms per cubic metre air, with pollution surging by 19.5 per cent in week-on-week increase, according to a report released on Thursday.

Nov. 21 (UPI) -- Delhi was listed as India's most polluted city Thursday as a weeks-long air quality crisis gripping northern India has shown few signs of letting up.