Headings Water Search Questions 
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Drinking Water.
Water is made safe to drink by removing solids and killing bacteria.
Solids are removed by
filtration and sedimentation.
Water is allowed to flow through
stone and sand filter
beds
to remove solid materials.
The sand becomes finer near to the bottom of the filter
to remove small solids.
Tiny
particles which are still suspended in the water are allowed to
settle out and fall to the bottom. This is called sedimentation.
Chlorine (or ozone) is bubbled through the water to kill
bacteria.
The safe clear water is pumped through underground
pipes to houses.
The quality of drinking
water is monitored by environmental agencies
for dissolved ions such
as nitrate.
Some people use water filters in their homes to make tap water
nicer to drink.
Water filters may contain silver which has an anti-bacterial
effect
and carbon
which is good at removing tiny
particles.
Pure
water can only be produced by
distillation.
Drinking distilled water removes ions
from the body
which may lead to health problems.
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