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Why is treatment necessary before using river water as drinking water?

Answer and explanation

Correct answer: Because it may contain impurities and germs

River water can look clean but still contain disease-causing microorganisms, suspended soil, chemicals, waste, or other impurities. Some harmful substances cannot be identified by sight, smell, or taste. Drinking untreated water may therefore cause illness. Treatment processes such as screening, filtration, disinfection, or other suitable methods help remove or control contaminants before the water is supplied for drinking.

The question asks why treatment is needed before river water is used as drinking water. Option A correctly states that the water may contain impurities and germs. Pure water does not cause harm merely because it is pure, and the statements about stone and drying the river are not meaningful reasons. Treatment protects public health; it does not necessarily remove every possible contaminant without proper control, but it is an essential safety step. Thus answer A is correct.

Related tags

Drinking WaterPurificationHealth

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