To better prepare Hong Kong for the challenges of climate change and increasing demand for fresh water, we can conserve water and explore new water sources which are less susceptible to climate change, including desalinated water.
Hong Kong once built the world’s largest desalination plant of the time in 70s, but was closed due to expensive technique. Entering the 21st century, Hong Kong Government has been keeping abreast with the latest developments in desalination technology. The feasibility studies have confirmed that seawater desalination using reverse osmosis is a viable technology, which produces potable water in compliance with the WHO's guidelines for water quality. The cost of has also been reduced over the years.
The Government is planning a desalination plant in Tseung Kwan O, which will adopt reverse osmosis technology. When the construction and expansion of the desalter is finished, the water production capacity can meet 5% to 10% of the overall fresh water demand of Hong Kong.
Source: Water Supplies Department