The diagram illustrates the process of gathering rainwater for the use of drinking water in an Australian town.
Overall, the procedures of the process are rather simple, having several stages. Notably, the process of producing drinkable water starts when the filter is used after it rains and ends with adding chemicals.
Before producing steps of water, it rains and each house collects rainwater from its roof, going through gutters and eventually going into drains at the bottom of the house. It is worth noting that all the drainages are merged into one main drainage system where all the collected water is filtered thoroughly. After that, filtered water is kept in a large industrialized size of storage to move on the next step.
The next stage commences when water treatment, which is named sanitization, takes place, a process producing safe and drinkable water by removing any impurities, such as biological and chemical contaminants. In the eventual process, some chemicals are added to water to remove any particles suspended in it. Finally, being carried from an upper building, the water becomes pure and safe to drink.