Due to these hidden faults, sewage often leaks into groundwater, contaminating the water supply without residents even realizing it. This can lead to serious health issues such as gastrointestinal infections, skin diseases, and respiratory problems. Additionally, during heavy rains, the outdated drainage system fails, causing waterlogging and structural damage to buildings.this problem is rarely noticed because it remains underground -literally and figuratively. The authorities focus on visible concerns like traffic and waste management, while this silent crisis continues to grow.