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As per CPCB’s specifications, the acceptable noise level (dB) in a silent zone during the day is 50 dB and during the night is 40 dB. In the case of residential areas, the permissible sound limits are 55 dB for the day and 45 dB during the night.
As per the CPCB’s list, the five contaminated sites in the city are Goripalya near Mysore Road, Mangammanapalya near Hosur Road, Peenya Industrial Area, Mavallipura dumpsite near Yelahanka, and Begur Lake. The list of probable contaminated sites includes Lalbagh Lake, Madiwala Lake, Hebbal Lake, Bellandur Lake, Kengeri Tank, Arekere Lake, Agara Lake, and Begur Lake.
As per the data, while the concentration of particulate matter (PM) 10 has reduced considerably at five out of seven monitoring locations in the city in November this year compared to last year, PM 2.5 levels have also decreased at two out of five monitoring locations.
Acknowledging Bengaluru’s rapid expansion in all directions, he identified five corridors as extensions to existing metro lines, totaling 129 km. “These corridors aim to connect peripheral areas and satellite towns, addressing the growing demand for public transport,” DKS said, appealing for supportive approvals from the Government of India.
According to official data, there has been a consistent decline in the noise levels in these areas over the last couple of months. While the decibel (dB) levels are still above permissible limits, Bengaluru’s silent zones are much quieter. While NIMHANS recorded a monthly average noise level of 55 dB during the day and 55.7 dB at night, on Mysore Road, it was 60.4 dB during the day and 56.9 dB at night.