Delhi's air quality deteriorates to 'very poor' category
Updated : October 17, 2018 02:54 PM IST
The overall Air Quality Index (AQI) of Delhi was recorded at 309, according to a data of the Centre-run System of Air Quality Forecasting and Research.
An AQI between 0 and 50 is considered 'good', 51 and 100 'satisfactory', 101 and 200 'moderate', 201 and 300 'poor', 301 and 400 'very poor' and that between 401 and 500 is categorised as 'severe'.
An official with the CPCB said a number of factors are responsible for deteriorating air quality, including vehicular pollution, construction activities and meteorological factors.
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