Delhi woke up to a thick layer of smog and fog on Monday.
IQAir placed Delhi's air quality in the 'very unhealthy' category on Monday morning.
It was confirmed that Delhi recorded its most polluted Diwali in five years.
The overall AQI stood at 371 at 10 am on Monday.
It was the highest for a post-Diwali day since 2021.
The Diwali-day AQI of 376 was the highest recorded on the day of the festival since 2021, when it was recorded at 382.
The average AQI on Diwali stood at 345 in 2025, 328 in 2024, 218 in 2023 and 312 in 2022, compared with 382 in 2021 and 376 this year.