The diagram shows rainwater is collected for the use of drinking water in an Australian town

The given diagram illustrate how an Australian town collect rainwater to process in order to use as drinking water.

Initially, the rain which fall on the rock topis collected by guitar then runs down the pipe at the side of the house each house used this way to collected the water and then passed along underground drains to the water filter.
After that, this water store into the storage and it removes it's impurities. Further, this water also runs to the water treatment. In this stage, chemical are mixed into the water because it's chemicals being good condition of the water. After that it, it runs to the each house for consuming by individuals.

Overall, this process show the seven stages of water and Evey step depicts the how to clean the water of rainfall.