Jahangirpuri recorded the highest AQI at 450, followed by RK Puram at 448, according to the Sameer app. New Delhi, Nov 8 (PTI) Delhi's air quality was in the 'very poor' category on Sunday, but set to worsen after Diwali celebrations in the. Delhi's air quality deteriorated to 'very poor' with an AQI of 376, as 12 monitoring stations recorded 'severe' levels; conditions are expected to worsen post-Diwali.