The given diagram describes how rainwater from each household in an Australian town is processed and used for drinking purposes.
Overall, it is obvious that the process of treating rainwater requires multiple complicated procedures commencing with the rainwater collected from house roofs and culminating with tap water ready to be used daily.
At the beginning of the process, rain water from rooftops is collected in a drain system. The unprocessed water then travels to an underground water filter, which partially removes some of the impurities and sediments. Once the filtration is completed, water continues to be sent through a pipeline to another storage chamber, where it is temporarily kept before being transferred to a new treating area.
Moving to the subsequent step, once reaching the water treatment facility, water is diluted with a number of chemicals, mainly to remove any remaining harmful particles. Finally, the processed water is pumped back to residential homes, through distinct water lines. At this stage, water is completely safe and ready to be consumed straight from the taps in residential homes.