Knowledge Framework
Use Cases
- Balance supply across multiple sources — Coordinate between reservoirs, groundwater, desalination, and recycled water to meet daily demand...
- Plan long-term water supply — Assess whether current water sources will meet future demand given population growth, climate cha...
- Treat wastewater for safe reuse — Take treated sewage effluent through additional advanced treatment to produce water safe for irri...
Decision Patterns
- Integrated water systems — Coordinate multiple supply sources
- National water strategies — Plan supply long-term
- Water reuse systems — Treat wastewater for reuse
System Models
Supply–demand balance models
Tool: Whole-of-system water resource model — Balances supply, demand, reuse, and desalination
Overview
NEWater is Singapore’s brand name for high-grade reclaimed water produced from treated used water (sewage effluent) that has been further purified using advanced membrane technologies. The water exceeds WHO drinking water standards and is a cornerstone of Singapore’s “Four National Taps” water security strategy.
The process involves three stages: (1) microfiltration to remove suspended solids, colloidal particles, and bacteria; (2) reverse osmosis to remove dissolved salts, organic matter, and viruses; and (3) ultraviolet disinfection as a final safety barrier.
NEWater currently supplies up to 40% of Singapore’s total water demand, primarily to non-potable industrial users (wafer fabrication, electronics manufacturing, cooling systems) and for indirect potable use through blending into reservoirs. PUB plans to increase NEWater capacity to meet 55% of demand by 2060.
Timeline & Location
1974: First study on water reclamation, but technology was not yet cost-effective. 1998: Feasibility study revisits reclamation with advances in membrane technology. 2000: NEWater demonstration plant built at Bedok. 2002: First two NEWater plants (Bedok and Kranji) commissioned. PUB Chairman publicly drinks NEWater at National Day celebrations. 2004: Ulu Pandan NEWater plant opens. 2010: Changi NEWater plant opens. 2017: DTSS Phase 2 linked NEWater facility under construction. 2025: NEWater supplies approximately 40% of demand.
Stakeholders
NEWater is wholly owned and operated by PUB (Public Utilities Board), Singapore’s National Water Agency, a statutory board under the Ministry of Sustainability and the Environment.
Key industrial users include semiconductor manufacturers and electronics fabrication plants that require ultra-pure water exceeding even drinking water standards. PUB manages public acceptance through education programmes at the NEWater Visitor Centre and regular public engagement.
Digitalisation & Data
NEWater plants are operated with advanced process control and SCADA systems monitoring every stage of the multi-barrier treatment process. Real-time water quality monitoring covers over 300 parameters including conductivity, turbidity, pH, and trace contaminants.
Membrane Performance Monitoring
Continuous monitoring of membrane integrity, trans-membrane pressure, and permeate quality ensures consistent output quality and enables predictive maintenance scheduling.
Integration with DTSS
NEWater production is increasingly integrated with the Deep Tunnel Sewerage System, which conveys used water by gravity to centralised reclamation plants, reducing energy costs and enabling larger-scale production.
Hazards
Exogenous Hazards
Climate change affecting rainfall patterns and imported water availability from Malaysia. Population growth and economic development increasing total water demand. Geopolitical risk around the 1962 Water Agreement with Malaysia.
Endogenous Hazards
Energy intensity of reverse osmosis treatment. Public perception challenges around drinking reclaimed water. Membrane fouling and replacement lifecycle costs.
Cost & Benefit
Cost: NEWater production costs approximately S$0.30–0.50 per cubic metre, which is competitive with desalination (S$0.45–0.80) and significantly cheaper than imported water when full supply chain costs are considered.
Key Benefits: Provides a weather-independent, locally controlled water source that reduces dependence on imported water from Malaysia. Closes the water loop by recycling used water to ultra-high purity. The industrial-grade water quality commands premium pricing from semiconductor and electronics manufacturers.
Resilience Principles Assessment
Assessment of meeting Principles of Resilient Infrastructure
Proactively Protected (P2)
NEWater provides a weather-independent water source that protects Singapore against drought and disruption to imported water. The multi-barrier treatment process provides redundant safety against contamination.
Environmentally Integrated (P3)
NEWater exemplifies circular water management, recycling used water rather than discharging it. Integration with the DTSS uses gravity flow to minimise energy consumption in water conveyance.
Socially Engaged (P4)
PUB invested heavily in public education and acceptance, including the NEWater Visitor Centre, National Day bottle distribution, and transparent communication about the treatment process. Public trust was built over years of engagement.
Shared Responsibility (P5)
Government-led national water strategy with costs distributed across all water users. Industrial users pay for the ultra-pure quality they require. Every resident contributes to the used water that becomes NEWater.
Continuously Learning (P1)
Continuous R&D investment in membrane technology, energy efficiency, and treatment optimisation. PUB collaborates with universities and international partners on next-generation water recycling technology.
Adaptively Transforming (P6)
NEWater represents a transformative shift from linear water use (abstract, treat, use, discharge) to a circular model (use, reclaim, reuse). Singapore’s target of 55% NEWater by 2060 demonstrates continued commitment to transformation.
Futures
PUB plans to increase NEWater capacity to meet 55% of Singapore’s water demand by 2060. Research focuses on reducing the energy cost of reverse osmosis through next-generation membranes, biomimetic desalination, and electrochemical treatment. The DTSS Phase 2 completion will further expand centralised reclamation capacity.