why drinking water must be dis infected
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Water from lakes, rivers, or streams and many groundwater sources may contain disease-causing “germs.” You can disinfect water by adding chemicals, using heat, using ultraviolet (UV) radiation, filtration or using a combination of these methods.
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because water from lakes, wells, underground resources having lots of impurities. so we have to purify/disinfect the water to make it drinkable for us. If we should not do so then we face so many difficulties related to our health.
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