Where Does Water Come From?

Over 70 per cent of the Earth’s surface is covered in water, but only one per cent can be used for drinking. To keep up with demand (and make sure we don’t go thirsty!) we need a variety of water sources.
Scroll down to learn about the different water sources and how we use them.

Tap Water

In Australia we have some of the cleanest and purest drinking water in the world. Most of the tap water we use every day comes from rain, collected and stored in large reservoirs. Which is why it tastes so good!


In Melbourne, water travels through underground pipes from reservoirs to storage tanks close to homes and businesses where it’s needed.

Rain & Greywater

There is often more than one water source
flowing through a house. It makes sense to use alternate
water sources like tank or greywater rather than our precious
drinking water. Have a look at the picture to see what types of
water are used in different areas.

Treatment Plant

Sewage leaves your home through drains and flows through pipes to a sewage treatment plant to be cleaned. At the treatment plant things like soap, laundry detergent, human waste and other pollutants are removed. When the water is clean it can be reused as an alternative water source.

Recycled Water

Recycled water can be used in homes, businesses and agriculture. We use it for everything from watering sporting grounds to irrigating farms, fighting fires and even in some factories.


Groundwater is found below the earth’s surface in the crevices of rocks and soil. Bores drill into the ground and bring water to the surface. Groundwater can be found almost anywhere but is not always accessible or fresh enough to use without treatment.

Desalinated Water

One option to ensure we always have a supply of water is to convert seawater to drinking water. Desalination is the process of removing salt and other minerals from seawater to make clean drinking water. Across the world there are over 50,000 desalination plants!

And that’s where water comes from

It is important to have different types of water sources to help secure our water supply against drought, floods, climate change and population growth. By using a variety of water sources we ensure we never run out of this precious resource.
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Water kit

For schools and kinders

Our kit includes books, jigsaw, posters, music CD and lots of water activities!