The overall Air Quality Index (AQI) in the national capital on Friday morning slipped to 368 in the 'very poor' category, according to the System of Air Quality and Weather Forecasting and Research (SAFAR). The PM 10 was recorded at 376 in the 'very poor' category and PM 2.5 was recorded at 224 in the 'very poor' category at 7:50 am. Gurugram and Noida recorded AQI of 350 and 463 respectively in the "very poor" and "severe" categories.

"The AQI today indicates 'Very Poor' category. Local surface winds are relatively low for the next 3 days that reduces the dispersion of pollutants leading to the deterioration of air quality but within the 'upper end of very poor' category for the next three days," SAFAR said in a bulletin. It further said that on November 29 local surface winds are likely to increase resulting in improvement of air quality but remains within the 'Very Poor' category.