New Delhi, Dec. 6 -- The air quality of the national capital remains 'very poor' for the third consecutive day on Friday and was likely to further deteriorate to the 'severe' category in some parts of the city on Saturday.

According to the Centre-run System of Air Quality and Weather Forecasting (SAFAR), the overall air quality index (AQI) of Delhi was recorded at 388 on Friday, against Thursday's 334.

The SAFAR model forecast suggests calm surface winds and a decrease in ventilation coefficient for the coming days and the condition was conducive for the pollutant accumulation.

"AQI is forecasted to stay at the border of very poor to the severe category until Saturday," SAFAR said.

It said the overall Delhi AQI was in the lower end of t...