A scheme to recycle wastewater in Shek Wu Hui for toilet flushing, landscape irrigation and possibly other non-potable reuse like street cleansing, is being explored and is expected to be in place in 2006, Secretary for the Environment, Transport & Works Dr Sarah Liao says.

Meanwhile, a pilot scheme for reclaimed water reuse in Ngong Ping will be commissioned in late 2005 in conjunction with the operation of the sewage treatment plant there and the opening of the cable car project.

Comprehensive sampling and testing will be conducted in the two pilot schemes to monitor water quality and health-related data, Dr Liao added.

Feasible options

Replying to Abraham Shek's query in the Legislative Council today, Dr Liao said a series of studies concluded in 2002 that three different options - extension of water gathering grounds, seawater desalination and wastewater recycling - are technically feasible to provide an appreciable amount of additional water resources.

She said extension of water gathering grounds involves the highest unit development cost and will cause major environmental impacts, adding this option will not be given a high priority.

On seawater desalination, Dr Liao said a detailed study has started to find technologies that are most suitable for coastal waters and their unit costs. A pilot desalination plant has been in operation since November and results will be available in the second half of next year.

Dr Liao said with results from the various pilot schemes, the Government will be able to review its long-term water resource plan for securing adequate water supplies.