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Diwali dawns on an AQI of 384, and 11 of 23 Delhi stations are already past 400

Delhi's citywide air quality index was 384 at 6am on Diwali Sunday, but 11 of the 23 stations reporting were past the 400 'severe' mark, with Punjabi Bagh at 450. Officials call it the capital's worst festival-eve air in a decade.