India, Nov. 24 -- With low winds speed and dipping temperatures, Delhi's air quality index (AQI) stayed in the vicinity of the 'severe' threshold on Sunday, with forecasts showing no sign of improvement in the coming days.

On Sunday, at 4pm, the city's 24-hour average AQI stood at 391 - firmly in the 'very poor' category. It was 370 at the same time on Saturday and 364 on Friday, data from the Central Pollution Control Board (CPCB) showed.

The Capital's air quality index (AQI) has stayed in the 'very poor' category for 18 near continuous days since November 6. In that period, it has seen three 'severe' air days - between November 11 and 13. HT had earlier reported that it has not seen any 'good' air days in two years.

The CPCB classifi...