Delhi pollution: Private construction banned in Anand Vihar, adjoining areas
GRAP is one of four levels of poor air quality in Delhi. Stage one represents 'poor' air quality (AQI 201-300); stage two represents very poor' air quality (AQI 301-400); stage three represents 'severe' air quality (AQI 401-450), and stage four represents severe plus' air quality (AQI >450).
Oct 23, 2022, 20:14 PM IST