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Indus Drainage and Sanitation

WH-01-029 Learning Card 29 of 55

What urban feature made Indus cities especially advanced for their time?

Reveal Answer

Extensive drainage and sanitation systems.

Indus cities are famous for sophisticated systems that managed household and street wastewater. Many homes had bathing areas, drains, wells, or soak pits, while covered brick drains ran along streets and could be opened for cleaning. These systems show careful civic engineering, although sanitation practices varied among neighborhoods and cities.

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Water Inside the City

Archaeologists have uncovered large numbers of wells and bathing areas at Indus sites, especially Mohenjo-Daro. Some houses had private wells, while others used nearby neighborhood wells.

Household Drains

Water from bathing areas could flow through small brick or pottery drains. In many cases, these emptied into larger drains along streets or into soak pits designed to collect waste and sediment.

Covered Street Drains

Some major drains were built of brick and covered with removable slabs or bricks. Access points allowed accumulated material to be cleared, showing that maintenance was part of the system’s design.

Why This Was Unusual

Many ancient cities had difficulty managing wastewater. The scale and regularity of drainage at several Indus sites show that water disposal was considered during neighborhood planning rather than added only as an afterthought.

Do Not Overstate the Evidence

It is tempting to describe the system as identical to modern sewers, but that comparison can be misleading. The drains handled wastewater and runoff in sophisticated ways for their time, yet their exact use differed by building and location.

Sources & Further Reading