Air quality continued to deteriorate but remained in 'severe' category in Delhi-NCR on Sunday, with pollution levels hovering at around 1,000. All pollution measurement stations in Delhi-NCR on Sunday showed a severe level of pollution, but on a much higher side. The overall Air Quality Index (AQI) hovered around 630 at 9 AM. Air quality of Anand Vihar, Narela, Bawana, and National Stadium was 979, 983, 903, and 942, respectively. Watch full bulletin.