For a small island with no natural groundwater, Singapore’s water self-sufficiency is remarkable. By looking ahead to climate change, the nation has become a global example of sustainable water management. This success is built on two pillars called the ‘deep tunnel sewerage system (DTSS)’ and ‘NEWater’ . The DTSS is like an underground highway, using gravity to move used water to centralised reclamation plants. There, it is purified through a rigorous three-stage process to produce ultra-clean NEWater. Acting as a weather-resilient national tap for Singapore, NEWater currently meets up to 40% of the nation’s demand, closing the water dependency and ensuring security during prolonged dry spells.
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