Water in our World Understanding Concepts 2. Why must water be treated before drinking? Science Grade 8

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Water has to be treated before people can drink it because water can be polluted in a wide variety of different ways.  For example, you cannot even drink water from a mountain stream without doing something to make it safe.

When we go backpacking, my wife and I need to...

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Water has to be treated before people can drink it because water can be polluted in a wide variety of different ways.  For example, you cannot even drink water from a mountain stream without doing something to make it safe.

When we go backpacking, my wife and I need to bring a filter and pump the water through it because of this germ called Giardia.  It is present pretty much everywhere in the world.  If you drink water that isn't treated or filtered you can get very sick from this.

Of course, there are many other kinds of pollutants...

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