BS 3 petrol and BS 4 diesel cars were banned in Delhi after pollution levels breached severe category last week.

The air quality index (AQI) in the national capital region deteriorated to 353 on Friday, from 345 a day earlier, remaining in the ‘very poor’ category, according to data from the Central Pollution Control Board.

Delhi-NCR's air quality has improved, leading to the revocation of Stage-3 of the Graded Response Action Plan (GRAP). Stage-1 and -2 measures remain in effect

Continuous rainfall since the morning has helped reduce pollution levels, leading to better air quality in Delhi

The IMD said Safdarjung weather station, which is representative of weather in Delhi, recorded 9.1mm of rain from 11.30pm on Thursday to 8.30am