Singapore’s water prices were last raised in 2017 by 30 per cent, phased over two years.... Seawater that has been desalinated is the most energy-intensive of all of Singapore’s water sources – the energy needed to produce such water is thrice that for Newater.... The agency added that construction costs have risen by 35 per cent, chemicals for water treatment by 33 per cent, and manpower and maintenance costs by 18 per cent....