Delhi woke up to toxic air a day after Diwali, with the air quality index (AQI) worsening to the 'severe' category as a thick layer of smoke engulfed the sky. According to data, the average air quality index (AQI) stood at 451 – 1.8x above the national average – as pollution levels worsened amid festive celebrations.

An AQI between 0 and 50 is considered "good", 51 to 100 "satisfactory", 101 to 200 "moderate", 201 to 300 "poor", 301 to 400 "very poor", and 401 to 500 "severe". - Ends

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