The diagram below shows how rain water is collected and then treated to be used as drinking water in an Australian town. Summarise the information by selecting and reporting the main features and make comparisons where relevant.

The diagram shows how

water

is collected in rainy weather and how a system turns it to be drinkable

water

again in an Australian town.

Overall

, it can be seen that there are a few steps needed in public facilities including filtering, storage and treatment.

First,

when it is raining, rainwater will be collected into the pine systems installed on the top of houses. the collected

water

then

flows to the drain which is under the houses.

Second,

the

water

collected by other families will flow into the public pine system together and

then

transits to a massive storage container after it filters out some pollutants primitively.

Third,

the stored

water

then

be transferred to other facilities for

further

treatment. In

this

step, some synthetic chemicals will be added to

water

.

Finally

, the purified

water

can be provided back directly to the families in

this

town to use again being drinking

water

.