The diagram illustrates how rainwater is collected and transformed into drinking water in an Australian town. It is evident that the graphic presents a straightforward and linear process with two main stages: collecting the rainwater and processing it into usable water through chemical methods. Overall, there are five steps, starting from gathering rainwater via a drain to dispatching fresh water for household use.
Firstly, the process operates whenever it rains, with each family having a drainage system connected to the processing one. The rainwater is collected and flows into a long drain to a water filter, where it is sterilized and contaminants are removed. After passing through the filter, the water continues through the pipes into a large storage tank, where further purification treatments are conducted using chemicals.
Next, the water is transferred to another container designated for water treatment. Various chemicals are added to eliminate all remaining toxic substances in the rainwater and produce clean, drinkable water that humans can use without any adverse effects. In the final steps, the water is distributed directly via the piping system to ensure sufficient clean water for all residents.