Pollution occurs when surface water flows through the domestic waste, industrial waste water, pollutants in the ground, and groundwater seepage.
Contaminated water is the change in the direction deteriorating the physical properties - chemical - biological water, with the presence of foreign substances in liquid, solid makes the water becomes toxic to human and material. Reduce biodiversity in the country. In terms of transmission speed and scale of the impact of water pollution is more worrying problem of land pollution
Eutrophication of water may be contaminated by cell nhiem.O water is changed for the worse the physical properties - chemical - biological water, with the presence of foreign substances in liquid, solid-making power water becomes toxic to humans and animals. Reduce biodiversity in the country. .
Contaminated water is due to the support occurs mainly in areas of freshwater and coastal zones, seas closed. Because of the salt and mineral content of organic matter makes the excess populations of organisms in the water can not be assimilated. The result makes the oxygen levels in water decrease dramatically, toxic gases rise, increased water turbidity, which degrade water bodies. In the oceans is a major cause of pollution is oil spills and water pollution caused by wastes and industrial wastewater is discharged into the river basin that is not properly treated; chemical fertilizers and pesticides seep into groundwater and pond water, waste water is discharged from the residential areas along rivers.
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