India, Nov. 10 -- A dense layer of smog blanketed the national capital on Monday morning, with the air quality remaining in the 'very poor' category, according to the Central Pollution Control Board (CPCB) while the mercury dipped further to a season low of 10.4degC, four degrees below normal.

Delhi's 24-hour rolling average air quality index (AQI) stood at 344 at 9am. It was at a season-high of 391 (very poor) at 8am on Sunday. It remained 391 till 10am on Sunday, but began to improve soon after winds of up to 15 km/hr were recorded during the day.

Noting the air quality, the Commission for Air Quality Management (CAQM) had also called a review meeting to assess the situation at 4pm, but decided not to invoke Stage-3 measures of the Gr...