* Channel News Asia.com – Body in Bedok Reservoir: PUB says water safe to drink

* Channel News Asia.com – Body in Bedok Reservoir: PUB says water safe to drink

Saturday, December 10th, 2011

Body in Bedok Reservoir: PUB says water safe to drink
By Evelyn Choo | Posted: 22 June 2011 2155 hrs

SINGAPORE: National water agency PUB says the water treatment process at its Bedok plant is stringent, ensuring that its water is safe to drink.

The assurance comes after part of a decomposed body was found floating in the nearby Bedok Reservoir.


A coagulant called aluminium sulphate is then used to clump the dead particles. Due to their combined weight, the dead particles sink to the bottom of the tanks, leaving clarified water at the top.

At this point, the water looks relatively clean, but it will go through three more steps to ensure it is safe to drink.

Ozone is introduced to the process once more, this time as a disinfectant. The ozonated water is then passed through filters to remove finer particles. To sustain the disinfection, chlorine is added, together with lime and fluoride.

And in four hours, the process is complete.

PUB says this is all part of a robust water supply system.

Lee Mun Fong, deputy director at PUB’s Water Supply (Plants) Department, said: “We have a plant that is able to treat water with multiple barriers and on top of that, we have a system that monitors from the source all the way to our tap. So I want to assure our customers that our water is safe to drink, even from the tap.”

In its full capacity, Bedok Waterworks supplies one-tenth of Singapore’s demands, distributing water to areas like Tampines, Simei and Bedok.

Bedok Waterworks is one of two plants that have been using ozonation for more than two decades, due to the environment of its catchments which require more treatment.

– CNA/ir

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