According to weather experts from Skymet, the reason behind this is a western disturbance on the western side of Himalayas which is going to impact the flow of air in Delhi-NCR regions. The reduced flow of air is likely to lead to an increase in the accumulation of pollutants in the region and on November 21 and 22 when the situation could worsen even further.
Apart from Delhi, Noida, Gurugram, Faridabad, and Ghaziabad too are going to be impacted by the worsening air quality.
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According to the Air Quality Index (AQI) data by the Central Pollution Control Board (CPCB), major pollutant PM 10 dominated at most places. Ashok Vihar and Anand Vihar recorded docked at 309 which fell under the "very poor" category. Alipur which docked at 300 also fell under the "very poor" at 7 am.
Major pollutants PM 2.5 were at 210 in the "moderate' category and PM 10 at 204 in the "moderate" category, in Lodhi Road area. Some areas like ITO (227), Okhla phase 2 (290) and Punjabi Bagh (286) remained in the "Poor" status.
The weather department has forecast shallow to moderate fog and wind speed of 6-8 km/hr for the next few days.
(with inputs from ANI)