Jump to the beginning of content

Water Treatment

Distribution of Water Treatment Works in Hong Kong

There are now 21 water treatment works with a total capacity of 5.02 million cubic metre per day to supply fresh water to a population of more than 7 million in Hong Kong.

Water Treatment Process

During the water treatment process, raw (untreated) water is pre-treated by dosing with chemicals and then passes to the clarifiers for removal of relatively large particles and impurities in water. Clarified water then flows into filters for filtering out the more finely divided particles. The filtered water is disinfected before supply to the public. A small amount of residual chlorine is maintained in the water to prevent bacterial growth on the rest of its journey. Fluoride is also added for dental protection.

Typical Water Treatment Process

Typical Water Treatment Process
Expand All + Collapse All -