Water Pollution: A Review

Water is a very important element for living organisms, and it is helpful in the circulation and transmission of nutrients in the biosphere. Due to industrialization, urbanization, and rapid increase in human population, the demand for water has increased sharply, and the quality has declined drastically. Although water has the ability to purify itself, when the concentration of pollutants generated from man-made sources becomes so high that it exceeds the self-purifying ability of water, then the water becomes polluted. Degradation of the physical, chemical, and biological characteristics of water by natural and man-made processes in such a way that it is unsuitable for humans and other biological communities. This is called water pollution.