The picture illustrates the contrast between the present and future water supply system in Australia.
Overall, waste water and storm water from households, commercial buildings, and the city can be repurposed after it has gone through the treatment process. This ensures that waste water and storm water does not end up in river and is reused.
On one hand, the current water supply plan stores pure water in dam or storage tanks and supplies it to various buildings, such as households, shops, and factories, and the city. The waste water collected from these areas are then sent to water treatment plant where it undergoes treatment before being disposed into the river. However, unlike waste waster, the collected storm water does not undergo any sort of treatment and is directly sent to the river.
On the other hand, the future water supply system has the same procedure when it comes to pure water supply and treatment, with the difference that once the waste water is treated it is not thrown into the river, rather it is supplied back to the buildings and the city for usage as pure water. The storm water also undergoes the treatment in the plant and is supplied back along with the treated water.