The last day of Ganpati Visarjan was the noisiest, with the highest noise levels of 120.2dB recorded at the Opera House beyond midnight. The highest sound decibel level on the tenth day of Ganesh Visarjan in 2021 was 93.1dB, in 2020 it was 100.7 dB, and in 2019 it was 121.3 dB, recorded by NGO Awaaz Foundation.
According to activist Sumaira Abduali, at Girgaum Chowpatty along the immersion route, loudspeakers from political pandals continued beyond the high court restriction past midnight on Friday night "Despite a personal visit to the Police Control Room at Girgaon Chowpatty and a twitter complaint to Mumbai Police at 1.06 am, the loud speakers continued with the noise pollution," said Abdulalli.
The Awaaz Foundation systematically collects noise pollution data in India to be collated and presented to the State and Union Governments, Courts, police and citizens. Data is generated of noise levels at major events and sources including firecrackers, traffic, loudspeakers, industrial equipment and construction
