Water Systems Overview: PUB, Singapore's National Water Agency | Our Future Water Intelligence
Water Systems Overview: PUB, Singapore's National Water Agency
Strategic intelligence on Singapore's integrated water system, capital programme, climate resilience, and long-term supply independence.
This report is a premium, downloadable strategic intelligence briefing analysing how PUB, Singapore's National Water Agency operates as a system operator, with frameworks, governance models, and investment logic applicable to advanced water utilities globally.
Target Audience
- Utility Executives & System Operators: Understand how Deep Tunnel Sewerage System Phase 2 strengthens long-term network resilience and water reuse capacity.
- Regulators & Policymakers: Examine how the Four National Taps strategy supports long-term supply independence before 2061.
- Infrastructure Investors & Financiers: Assess how SGD 1.125 billion in green bonds supports delivery of strategic water infrastructure.
Report Deliverables
- Governance Structure Review: Provides analysis of unified statutory governance across supply, treatment, reclamation, and coastal protection.
- Digital Operations Assessment: Delivers insight into smart metering, predictive maintenance, and real-time network visibility.
- Capital Investment Framework: Enables evaluation of reserve growth, green bond financing, and long-term infrastructure funding.
- Climate Resilience Outlook: Provides assessment of coastal adaptation priorities, flood management, and sea-level risk exposure.
- Demand Management Strategy: Delivers frameworks for industrial recycling, tariff reform, and water efficiency planning.
The Five Strategic Pillars
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Architectures: Supply Self-Sufficiency
The Four National Taps strategy anchors long-term planning around the 2061 expiry of the Johor import agreement, with NEWater targeted to reach 55% of total demand by 2060.
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Enablement: Capital Programme Delivery
Major infrastructure programmes including the Deep Tunnel Sewerage System Phase 2, Tuas Nexus, and green bond financing support long-term expansion of treatment and reuse capacity.
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Resolution: Coastal and Climate Resilience
Climate adaptation is being strengthened through the Coastal and Flood Protection Fund, Long Island reclamation, and long-term planning for extreme sea-level rise scenarios.
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Alignment: Digital Operations
The Integrated Operations Control Centre, smart meters, and AI-enabled monitoring improve operational visibility, leak detection, and network performance.
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Capability Building: Demand and Industrial Water Management
Mandatory industrial recycling requirements and expanded Water Efficiency Fund support lower water intensity across high-value industrial sectors.
Operational Excellence & Resilience
PUB, Singapore's National Water Agency operates an integrated water network supported by reservoirs, desalination plants, NEWater facilities, and a deep tunnel sewerage system. Performance is achieved through the Integrated Operations Control Centre, predictive maintenance, and real-time monitoring across supply and sewer assets. This is further supported by smart metering, advanced water quality testing, and industrial recycling requirements.
Key performance is reflected in a non-revenue water rate of approximately 5% across the distribution network. This is reinforced by 300,000 smart meters delivering water savings of 15–17% in pilot programmes.
The Deep Tunnel Sewerage System Phase 2 is the largest water infrastructure project in Singapore's history, supporting long-term reuse, land recovery, and system resilience through a 98 km underground network.
About the Author
Expert Briefing: FAQs
PUB funds its capital programme through tariffs, reserves, green bonds, and dedicated government climate funds. This is supported by a capital reserve of SGD 5.3 billion and green bond issuance totalling SGD 1.125 billion. This is delivered through the Green Financing Framework and the Coastal and Flood Protection Fund.
The primary driver is the need to achieve water supply independence before the Johor import agreement expires in 2061. This is supported by projected demand growth from 440 million gallons per day to approximately 880 million gallons per day by 2065. This is delivered through the Four National Taps strategy and the Deep Tunnel Sewerage System Phase 2.
PUB operates one of the most advanced digital water systems in the world. This is supported by more than 300,000 smart meters and a non-revenue water rate of approximately 5%. This is delivered through the Integrated Operations Control Centre and AI-driven predictive maintenance.
PUB integrates decarbonisation into operational efficiency and infrastructure design. This is supported by Tuas Nexus, which is targeting full energy self-sufficiency by 2027. This is delivered through biogas-to-energy systems, lower-energy reuse infrastructure, and green bond financing.
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