Q57 What has contamination of water become? A The degradation phenomenon of tap water is excessive every year. Since the head which takes in water is polluting certainly, it is unavoidable. It adds to it and they are the demand of industrial water, and the increase in population, we also have the situation which must be used even for water unsuitable as a head originally. The water of water service has been made unsavory from ancient times. Well water and groundwater which were existence contrastive with it are also polluted. It is the situation that the residual substance of industrial drainage or agricultural chemicals permeates underground, and is polluting groundwater. In Japan, the government planned "100 selections of excellent water" once. Those springs have been considered to be excellent water. In Japanese every place, political consideration was added and 100 places were chosen so that it might not incline toward specialization in an area. But, when investigating the ingredient of the water, there was no water which can be drunk 30 percent of the whole. The remainder was water which contains the poisonous ingredient in the human body. Probably, they were safe water once, if it was called "excellent water" at all at least. But, it is polluted with present by the merciless state. These "excellent water" are in the mountains zone which left the city comparatively. But, why has the water in such a place polluted? It seems that it has the large influence of a golf course. Especially in environment of Japan, in order to always maintain green, spraying of immense agricultural chemicals is needed. Of course, drainage after sprinkling is a hang sink. A seaway is situated in near, and if "excellent water" is in a down-stream region, contamination will happen simply. In Japan, many pollution incidents, such as a "Ashio mine pollution affair", "Minamata disease", and "The Itai Itai illness(a painfull illness)", were reported on a grand scale by mass communications as a serious social problem. Japanese people should know with the body whether factory drainage is detrimental however. But, is "it passes in water(forgive and forget )"'s favorite national traits very much as for them? In Japan, it hangs down and, after that, sink pollution is not so much improved. A cleaning factory also gives drainage of dry cleaning and pollutes groundwater. This waste fluid has the subterranean character which passes deep and permeates. Once it will be polluted, even the deepest groundwater will be certainly polluted in several years. The industrial drainage taken out from a semiconductor factory also attracts attention as a new pollution source. Ordinary citizen cannot live in the city where soil has jumped suddenly. New development territory some dozens of km away from the place of work. They search for a dwelling reluctantly there. But, such most places are the housing site by the random development of rapid increase. There is almost no sewer etc. It will be equipped fully with the sewer if it is the large-scale development territory by the company of a major company. But, even if such housing site is considerably situated in a country place, it does not seem to be the price which an ordinary citizen can purchase. In the residence of mini-development, home drainage becomes a hang sink. The residence in which the merger septic tank is installed is a conscience-way. Even if it calls it home drainage, drainage of chemistry factory outshining, such as neutral detergent, and oil, an insecticide, a mold removal agent, a chlorine descent bleach, flows out. They flow into nearby water for agricultural use and nearby general river, and cause environmental destruction. Suppose that you established the dwelling in the mini-development territory which water service does not have, either. It is a tragedy. Of course, you have to ask a well for a head. It brings the result to which you drink again the poison which you bound. It may be said especially that its housing site was on the once industrial-waste place as an awful example etc. When that place is using well water, the fearful result is waiting. Such a talk is not a joke. This is the present condition of Japan.