HDB HOUSING ESTATES (Measures to eradicate problem of rusty water)

Mr Chew Heng Ching asked the Minister for National Development (a) what measures are being taken by the Housing and Development Board to solve the problem of rusty water in existing housing estates; (b) whether HDB has a comprehensive plan to tackle and eradicate this problem; and (c) what measures HDB will take to ensure that the problem will not happen in new housing estates.

The Minister for National Development (Mr Teh Cheang Wan): Mr Speaker, Sir, rusty water is normally caused by the corrosion of galvanized steel downfeed pipes, The HDB currently has a programme to replace the pipes of apartment blocks receiving water from reservoirs with high chloride content. The new pipes will be made of UPVC or other non-corrodible materials. Pipes of apartment blocks receiving water from reservoirs without a high chloride content will also be examined to see whether they need to be replaced. Since 1982, the HDB has been using non-corrodible pipes in its new apartment blocks.

The HDB also has a regular programme of flushing, cleaning and repainting its water tanks. For a longer term solution to the rust problem, the HDB is studying the use of reinforced concrete and fibre-glass polyester tanks instead of steel tanks.

Mr Chew Heng Ching (Kaki Bukit): Sir, the Hon. Minister mentioned in the House last week that the HDB will draw up a schedule of programme to combat the rusty water problem existing in housing estates. May we know when will this schedule of programme be made known to the public?

Mr Teh Cheang Wan: Mr Speaker, Sir, in about three months' time the Area Offices should be able to draw up the plan.