Water can take many nuanced forms: rain, wastewater, groundwater, desalinated water, recycled water, storm water, flood water, etc. Each of these is water that is valued and is usable, provided it undergoes proper treatment for its end purpose. Water that can be used for drinking water is called potable water. Water that cannot be used for human consumption is non-potable water. Non-potable water can be further treated to become potable water. In some cases wastewater is treated for potable reuse, meaning it has been treated to the extent that it is safe to use as drinking water. In other cases, wastewater may be treated to non-potable standards to be used for irrigation or other purposes.