Hyderabad recorded a sharp increase in air and noise pollution during Diwali celebrations, with PM2.5 levels up by 86 per cent and PM10 by 68 per cent. While gaseous pollutants remained within permissible limits, noise levels spiked across industrial, commercial, and residential zones
Noise levels were another parameter monitored by the pollution board and the data observed that noise levels were same in day time pre-Diwali and during Diwali while night time values shot up by 2.3 dB in industrial areas
