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 Water
treatment is the process of cleaning water. Treatment makes the water
safe for people to drink. Because water is a good solvent, it picks up all
sorts of natural pollutants. In nature, water is not always clean enough
for people to drink. When the microscope was invented in the 1850s, germs
could be seen in water for the first time. In 1902, Belgium was the first
country to use chlorine to clean or treat water in a public water supply.
Today, almost every city in the world treats their drinking water. Treatment
includes disinfection with chlorine or other chemicals to kill any
germs in the water. An
example follows:
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