The Air Quality Index in several parts of Delhi worsened to the “ very poor ” category on Sunday, a day before Diwali.

The overall average AQI at 4.30 pm stood at 295 , which is categorised as “poor”, according to data from the Indian Institute of Tropical Meteorology.

However, the AQI in several areas was in the “very poor” category, including Lodhi Road, where the index stood at 301, Nehru Nagar at 316, Patparganj at 311, Punjabi Bagh at 311, RK Puram at 322, Dwarka at 324 and Rohini at 302.

Anand Vihar reported the highest pollution levels at 427, which falls in the “severe” category.

An index value between 0 and 50 indicates “good” air quality, between 51 and 100 indicates “satisfactory” air quality and between 101 and 200 indicates “moderate” air quality. As the index valu

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