The diagram illustrates the process in which an Australian town processes and collects rainwater for drinking.
Overall, rainwater is collected from some roofs, sent underground, passed through a water filter and funneled into a storage system, treated with chemicals after being transported into another tank, and is sent back to the houses as viable, clean water that can be used for drinking.
Initially, rainwater falls onto the roofs of houses and feeds into a drainage system. Then, the connected drainage system feeds into an underground storage tank after passing through a filter.
Next, some of the water from the storage system is pumped into a nearby water treatment tank which purifies water using certain kinds of chemicals. Finally, this purified water can then be pumped back to the houses to be used safely as drinking water.