Natural water is tied to the well-being of human beings. Animals and plants of prosperity: water on the soil surface in each day. We need a lot of water, both in the field of consumer and professional, such as fisheries and agriculture. Therefore it is necessary to help maintain natural water sources are always clean. If you leave a dirt, such as waste or wastewater. To mingle in natural water, the water becomes polluted water at a later time. It would be harmful to the lives of the people. Plants and animals. Not only, but only one area. May extend the entire width of the danger area, far away from surrounding communities.