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 What is a water pollution?

The addition of harmful substances to water which causes its physical, chemical and biological properties to change is called water pollution. 

The substances that pollute water are called water pollutants. Sewage, toxic chemicals, silt etc. are examples of water pollutants.

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Water pollution is the contamination of water bodies (e.g. lakes, rivers,oceans and groundwater). Water pollution occurs when pollutants are discharged directly or indirectly into water bodies without adequate treatment to remove harmful compounds.

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