Page 109 - EVS Class 04

Thus, we need to be a little careful to

conserve water. Rainwater harvesting is
a very good method to conserve
rainwater and store it for later use. This
is done in open rural areas.

Purification of Water

Water that is pure for drinking is called Rainwater Harvesting
potable water. Water from rivers, lakes, reservoirs and other water bodies is
brought through channels to the water- treatment plant. Here, this water is

made pure for drinking. At the water-treatment plant, water is first filtered
to remove the impurities. It is then treated with chemicals to kill the germs
present in it. This purified water is then pumped into huge water tanks.
From here, the water reaches the taps in our houses through a network of

pipelines. The height of the tank gives steady pressure to water passing
through the pipes to our taps.

Water Treatment Plant

Water can be made safe at home by the following methods:

Boiling

Boiling kills the germs in water. Water should
be boiled and cooled before drinking.

Using Chemicals

Chlorine tablets are added to water to kill
germs in it. This process is called chlorination.

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