New Delhi recorded the highest Air Quality Index (AQI) among six Indian cities, with a reading of 275. The national capital's air quality fell in the 'Poor' category as of Friday evening. The. GRAP Stage 3 activated in Delhi-NCR as severe air quality prompts bans on older LMVs and shifts to hybrid classes. The decision comes two days before the festival, with Delhi's air quality remaining in the 'very poor' category.