Delhi’s air quality stayed in the ‘very poor’ category on Sunday, touching a seasonal high of 388 at 10 a.m., and the city is expected to record the year’s first ‘severe’ air day this week. At 4 p.m., the average Air Quality Index (AQI) marginally improved as the winds picked up speed during the day, registering 366 at 4 p.m., when the Central Pollution Control Board (CPCB) released its daily national bulletin. However, at least five individual active ambient air quality stations recorded AQIs in the ‘severe’ category.

Long-term trends indicate that Delhi has entered its most polluted phase of the year. A Delhi Pollution Control Committee (DPCC) analysis of CPCB data found that November 1–15 has consistently recorded the highest AQI levels annually, followed by December 16–31.

On Sunday,

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