International Science and Technology Journal

The Water is essential for life and indispensable for all living things. The importance of water comes to man after air oxygen directly, man needs some liters of it every day, so this must be pure water within reasonable limits, otherwise the person will suffer a lot of damage, For many known diseases such as cholera and dysentery. One of the problems facing the land is the pollution of water and the consequent dangers and destruction of humans and the environment and threatens to eliminate all aspects of life.
Water is the main constituent of all living organisms. It accounts for between 50% - 60% of the objects of high organisms, up to 90% of the bodies of minimum animals, and covers about 80% of the Earth's surface. These reasons reflect the true value of water and its critical role in all biological processes. For all forms of life.
The great attention given by environmentalists and their cries of distress to protect water resources from pollution and save what can be saved. In this paper, we discuss the sources of water pollution, such as human, plant, industrial and other wastes, as well as shed light on some methods and techniques of water treatment. Then we discuss the state of water in Libya and the experiences of some countries to reduce the process of water pollution and we concluded for some guidance to reduce the water pollution.