According to the index, an AQI between zero and 50 is considered 'good', 51 and 100 'satisfactory', 101 and 200 'moderate', 201 and 300 'poor', 301 and 400 'very poor', and 401 and 500 'severe'.
The lowest temperature was recorded at the Ayanagar station, which registered a minimum temperature of 5.9 degree Celsius here, the India Meteorological Department said.
The maximum and minimum temperature would be around 20 and 8 degree Celsius respectively in the national capital, the India Meteorological Department said in its forecast.
The air quality is expected to improve marginally by Sunday as wind speed picks up under the influence of the western disturbance, according to the weather department.
No major improvement is predicted till December 26, said Kuldeep Srivastava, the head of the India Meteorological Department’s regional forecasting centre.
The minimum temperature is set to drop further as icy cold winds from snow-laden western Himalayas continue to blow towards the plains.
Calm winds and low temperatures trap pollutants close to the ground, while favourable wind speed helps in their dispersion.
According to the index, an AQI between zero and 50 is considered ‘good’, 51 and 100 ‘satisfactory’, 101 and 200 ‘moderate’, 201 and 300 ‘poor’, 301 and 400 ‘very poor’, and 401 and 500 ‘severe’.
Recently the Delhi Assembly’s Committee on Environment demanded strict action against the two CMs and said that a case can be registered against them for negligence in stopping crop residue burning.
The AQI is again going to improve to the moderate category by Friday owing to favourable wind speed.
This came as many burst firecrackers in violation of the complete ban on the sale and bursting of firecrackers in the national capital by the Delhi government and the National Green Tribunal.
As per officials from the IMD, Delhi’s air quality can get worse if there are additional emissions from firecrackers and traffic.
Kejriwal said that he wanted to appeal to the SC the Central government, and states — Punjab, Haryana and Uttar Pradesh (UP) and all other agencies to act on resolving the problem.
The cricketer-turned-politician also questioned the ban imposed by the government on firecrackers in the city.
V K Soni, the head of the IM D’s environmental research centre, said calm winds and firecrackers emissions may push the air quality to the “severe” zone on Diwali night.