The diagram illustrates how an Australian town collected rainwater to use as drinking water.
Overall, the rainwater harvesting process includes several steps like rain drops collected from houses and then it passes through a water filter into a storage tank where it is treated with the chemicals to make fit for human use.
Initially, rain which falls on the rooftop is collected by gutters, and then all water is passed through a drain pipe. Then all drain pipes are connected to a main pipe. Additionally, it goes to a water filter where dust and physical particles are separated from the water with the use of a filter. After that filtered water is stored into a storage tank. In the next stage, water is transferred into a water treatment tank.In this stage, chemicals are used for cleaning and purification of water. when the water is ready for drinking use it travels along pipes that lead back to houses in town where people can use the water for daily consumption. Now it is ready for human use.