The diagram depicts the process in which storm water is reused in an Australian city.
Overall, the system comprises five stages, commencing with the collection of rainwater and culminating in the distribution of treated water to households.
In the initial stage, rainwater is collected through drains located beneath houses and channeled via a central pipe to a water recycling plant. At the plant, the water undergoes a four-step filtration process. First, large objects such as plastic and rubbish are removed. Next, smaller particles are filtered out, after which bacteria and viruses are eliminated. In the final filtration stage, molecules and salt are extracted from the water.
The purified water is then treated with chlorine to ensure that it is safe for consumption. Finally, it is stored in a water bank before being pumped to households for domestic use whenever required.