Two key features of the drainage system of the Indus Valley Civilization are:
1. Well-Organized Drainage System: The drainage system was highly advanced and carefully planned. Every house in major cities like Mohenjo-Daro and Harappa had individual drains that connected to a larger network of streets. This system helped in managing waste water and maintaining sanitation.
2. Covered Drains and Sewers: The drains were covered with bricks and had regular openings for cleaning. This ensured that waste materials were carried away efficiently and reduced the risk of contamination or blockage, highlighting the civilization's attention to hygiene and public health.
