Technically, all the water we use for drinking, washing and cleaning is recyclable. Most of the water coming into our reserves is either sent directly to irrigation systems to irrigate green areas around cities and towns, or is first used in a wastewater facility before it is used for irrigation.

However, even water that finds its way back to the sea will evaporate in the atmosphere where it returns to Earth through precipitation, forming clouds. Therefore, all water on Earth comes from a limited supply that is constantly replenishing itself. Of course, the cycle of this system takes a long time to complete, and the increasing demand for water with the ever-expanding population requires that this cycle be accelerated by the use of wastewater treatment plants