Delhi, Air quality index

BS 3 petrol and BS 4 diesel cars were banned from roads in Delhi after GRAP Stage 3 measures were implemented on Friday ...
Cold weather conditions persisted in Delhi on Monday with parts of the city receiving light rainfall and the mercury settling ...
Delhi-NCR air quality improves, GRAP stage 3 curbs revoked due to favorable meteorological conditions, AQI at 339.
Despite the overall improvement, Delhi witnessed six days of "severe" air quality in December, with AQI readings above 400.