All cities of Harappan civilization have:
Well developed water supply
Harappan civilization people built “levees” to control floods. It is obvious that Indus river would flood often.
Levees are raised platforms or earthfills.
Stepwell is a type of well in which there are stairs to descend and reach the water. In india, even today they are popular and referred to as “bawdi” .
Stepwells were excavated in harappan civilization cities.