Mohenjodaro's living conditions were very advanced and fascinating for its time. The city was thought to have at least 50 thousand people living in it at a time. The citadel was a fortress on a piece of raised land to the west of the lower city. It was surrounded by a wall and people probably found shelter there during times of danger.
The lower city built its houses on a grid-like pattern. The houses were facing narrow alleys and the backs opened up onto courtyards were families could gather.
The houses were built out of mud bricks and were two story with flat roofs. There were narrow windows on the second floor and houses contained anywhere from 1 to 12 rooms. Each room would have different purpose. Archaeologists believe that the wealthy lived in larger homes with more rooms while the poor lived in smaller rooms with less rooms.
Another great feature was the sewage system. Mohenjodaro had a very advanced sewage system that was only seen in Mohenjodaro until 2 thousand years later in Rome. The sewage system consisted of clay pipes, drains, wells and bathrooms.
The pipes connected the houses to the main system of channels that ran through the streets. Dirty water and waste ran through the channels and emptied into the Indus River. Because of the grid pattern the houses were built on, it made it easier to get water to and away from the houses. It also made it possible for all the houses to have a bathroom, whether rich or poor people lived in it.
The most dramatic feature of the citadel was the Great Bath. It was a large pool about 8 feet deep. It was built of waterproof brick and dressing rooms circled the pool. One of the dressing rooms had a well that supplied the Great Bath with water and a drain drained out the dirty water.