'Delhi's air quality deteriorates, may worsen'

8:36am PDT - October 13th, 2018    air quality - The Times of India

'Delhi's air quality deteriorates, may worsen'An AQI between 0-50 is considered 'good', 51-100 'satisfactory', 101-200 'moderate', 201-300 'poor', 301-400 'very poor', and 401-500 'severe'.