people have pledged to
make every drop count.

Watch Water’s Odyssey

Water goes through a lot to reach your tap. Take the plunge and experience the epic journey it makes from the skies, through the pipes, and finally to the taps.

Watch the film

Our tap water is clean and safe to drink.

How do we turn raw water into clean drinking water? Take a closer look at the key stages of the water treatment process, and appreciate the work that goes behind every drop.

Stage 1: Coagulation & Flocculation

In order to bind small floating particles together, coagulants such as polyelectrolyte and aluminium sulphate are added into the water. Silt, sand and other suspended matter “flocculate” to form larger and heavier clumps.

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Stage 2: Sedimentation

As the large particle clumps are heavier than water, they gradually settle down to the bottom of the sedimentation tank, where they will be removed.

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Stage 3: Filtration

The water then passes through rapid sand filters or membranes to remove finer residual particles of up to 0.02 microns. As a comparison, the thickness of a strand of human hair is around 50-120 microns.

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Stage 4: Disinfection

In this final stage, the water is disinfected with chlorine or ozone to ensure that no harmful bacteria or viruses are present. The disinfection is carried out in accordance with World Health Organisation’s guidelines.

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