Delhi's AQI enters 'severe' category

Delhi's air quality entered the severe category on Tuesday morning, with several places recording higher AQI just days ahead of Diwali. At Bawana station, the AQI was 409, and it was 411 at Vivek Vihar station. Both the readings fall in the severe category. In Chandni Chowk, the AQI was 354, which falls under the very poor category.