Delhi recorded an overall AQI of 383 at 8 am on Diwali, with several monitoring stations reporting readings above 400. Grap Stage 3 curbs are in force across Delhi-NCR amid worsening air quality. Delhi woke up to toxic air on Diwali morning, with the national capital recording an Air Quality Index (AQI) of 383 at 8 am, according to Central Pollution Control Board (CPCB) data.