New Delhi, Dec. 19 -- Early morning visibility was low in parts of the national capital on Friday due to a thick layer of smog and haze, with mercury levels settling at 9 degree Celsius.
Delhi's air remained in the 'very poor' category, with the 24-hour average Air Quality Index (AQI) settling at 382, edging closer to the 'severe' category.
According to the Central Pollution Control Board's SAMEER app, out of 40 air quality monitoring stations across the city, 14 recorded severe air quality while 26 were in the very poor category. Vivek Vihar recorded the worst air quality with an AQI of 434, the data showed.
As per the Central Pollution Control Board's classification, an AQI between zero and 50 is considered good, 51 to 100 satisfactory...