In the annals of history, ancient India carved a significant path forward with the introduction of sewage systems, a groundbreaking development during the Indus Valley Civilization (3300 BCE to 1300 BCE). The remnants of cities like Harappa, Mohenjo-daro, and Dholavira stand as enduring testaments to the ingenuity of their sewage systems, showcasing a commitment to cleanliness and public health that transcended time. These ancient marvels not only maintained sanitation but also became instructive for civilizations beyond, providing valuable lessons in urban planning.