Read First>>>> The Indus Valley city planners were the first to make a system of drains. This maze of covered, sloping drains made sure water and dirt flowed away from the houses. This kept the cities clean and healthy. The main drains were large. Cleaners could actually walk through to clean them. One brick with a notch cut in the center kept the drains clear. Each house had a bath area. It included a bathing platform to stand on. The used water flowed into drains. People threw their garbage in brick pits. From there it was taken away. The Indus Valley cities stayed clean. Question: How did the development of a drainage system benefit the Indus River Valley?

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