Delhi’s air quality continues to be in the ‘very poor’ category with the AQI slipping to 368, according to the System of Air Quality and Weather Forecasting and Research (SAFAR). 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.
“Local emissions and weather (Mixing layer height and wind speed) are likely to be the dominant factors controlling air quality. Effective fire count is 219 and its per cent share in Delhi’s PM2.5 is 6 per cent,” it added.
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’.
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