Plumbing

Just like most civilizations water was needed for agriculture(the main economic activity) and humans needed to survive. Wastewater management. Contaminated water and poor sanitation leads to disease transmission.

Waste water was collected through terracotta pipes into a sump and removed contaminants then into drainage channels that led to the streets. Extensive networks of reservoirs, wells, and canals were used as water harvesting techniques.

There was a sanitation system that was designed to prevent the spread of diseases and helped the development of irrigation which led to complex urban societies.