In Japan, there are many water filtration plants but one that Loop PNG recently visited is the Kawai Purification plant located in Yokohama city.
Imagine drinking water that has been purified using ceramic membrane filtration system, a filtration system that is as thin as the strand of your hair.
That is basically water filtered through microfiltration filters to purify or treat water.
That is the level of technology that is being used today at the Kawai Purification plant. It started off in 1901 using the slow sand filtration system.