New Delhi: Pollution levels in Delhi was "very poor" on Sunday, prolonging the spell of toxic air that has hung over its residents for several weeks now. The city logged a 24-hour average AQI of 308.

Among the recorded monitoring stations, 29 remained in the "very poor" category on Sunday evening, according to CPCB's Sameer App, with Bawana reporting the highest Air Quality Index (AQI) at 336.

The app showed that at 10 am, the air quality stood at 302, with 26 stations across the city reporting "very poor" levels.

According to the Central Pollution Control Board (CPCB), an AQI between 0 and 50 is classified "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor" and 401 and 500 "severe".

According to the Decision Support System for Delhi's

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