Question raised in Lok Sabha on Noise Pollution, 05/01/2018. Ambient noise levels are monitored on real time basis by Central Pollution Control Board (CPCB) in association with State Pollution Control Boards (SPCBs) / Pollution Control Committees (PCCs) in seven metro cities, namely Bengaluru, Chennai, Delhi, Hyderabad, Kolkata and Mumbai under National Ambient Noise Monitoring Programme (NANMP). The average level of noise pollution in respect of seven metro cities of the country including National Capital Territory of Delhi during last three years is annexed. The analysis of data indicates fluctuating trend in the noise levels. During day time, Lucknow recorded the maximum sound level followed by Kolkata, Delhi and Mumbai. Similarly, during night time maximum sound level observed at Chennai followed by Lucknow, Kolkata and Mumbai.