Politics Delhi air quality 'severe' for 4th consecutive day; Ghaziabad records the highest pollution level at 480 Updated : November 15, 2019 11:57 AM IST In the National Capital Region, Faridabad, Ghaziabad, Greater Noida and Gurgaon also recorded severe air quality, the CPCB said. The air quality index (AQI) in Delhi was in the severe category at 467 at 10 am. An AQI between 201 and 300 is considered 'poor', 301-400 'very poor' and 401-500 'severe'. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.