The flow diagram depicts the process of rainwater collection to use as drinking water in an Australian town.
It is shown that converting rainwater to drinking water is a
6-step process, beginning with the collected rainwater and ending with a mixture of chemicals to provide water for consumption.
At the first stage of this process, impure water is collected through drains that are attached to the houses. The contaminated water from each house moves through the pipes underground where they all eventually join a common pipe and move deeper into the drain by gravity and enters an underground water filter. Subsequently, the filtered water travels into a storage container.
At the fourth stage, filtered water enters a second container of approximately similar size, to undergo treatment with certain chemicals, such as chlorine (to kill bacteria). Following the treatment, treated water travels against gravity back to the houses. Finally, the distil water is safe for consumption.