The Indus Valley had a More Advanced Sanitation System Than Many Contemporary Urban Cities

The first known urban sanitation systems were found in the towns of the Indus Valley Civilization. All the houses had latrines, bathing facilities, and sewage drains that drained into larger public sewers and eventually deposited the fertile sludge on nearby agricultural fields. Some homes even had the world's earliest known flush toilets. The majority of homes had private wells, and a complex water management system with multiple reservoirs was in place. All of these factors speak to the importance of hygiene in the Indus Valley Civilization, as well as their incredible hydraulic engineering abilities.

The Harappan civilization's sewerage and drainage system was far more advanced than those of most Western towns until the twentieth century, and even many modern major centers in the developing world. All the outflow pipes had a terracotta lid to cover them, with chambers attached to make it easy to open the lid. The drainage system and chamber engineering concept was a key invention in ancient times. Apart from sanitization technologies, the valley produced a slew of other innovations, including uniform weights, rulers, buttons, medals, ceramics, seals, and the Indus Script. Too long a time compared to now, but they had an advanced sanitation system, so this is one of the interesting facts about the Indus Valley civilization.