Like every year, CPCB has planned for air quality and noise level monitoring on selected pre-Deepawali day (21.10.2019) and on Deepawali day (27.10.2019) in Delhi. Ambient Noise was monitored at 16 locations (06 manual and 10 real-time noise monitoring). Ambient Air Quality was monitored at 37 operational Real-time monitoring stations. Noise Level and air quality data on Pre-Deepawali day (October 21, 2019) and Deepawali day (October 27, 2019) are presented in this report for assessment of impact of Diwali celebration.