India, Dec. 14 -- The air quality in the Capital kept deteriorating throughout Saturday due to low wind speed since Friday. Forecast suggests a similar level of pollution on Sunday too.

The air quality index (AQI) was recorded at 401 -- "severe" category -- at 11am on Saturday, worsening to 416 by 2pm, and the 24-hour average AQI at 4pm was logged at 431, according to data from the Central Pollution Control Board (CPCB). The 10pm reading was recorded at 457 (severe+). On Friday, the 24-hour average AQI was 349 (very poor).

Meanwhile, 31 out of 39 active air quality monitoring stations of Delhi recorded an AQI above 400 on Saturday, which marks the fourth "severe" day of the year in the Capital. Before this, Delhi recorded a streak of "s...