The Water Efficiency Fund provides grants of up to SGD 5 million per project for on-site industrial recycling infrastructure. The fund co-invests public capital in private compliance infrastructure, reducing the financial barrier to meeting mandatory recycling requirements. The fivefold cap increase in July 2023 preceded the January 2024 mandatory recycling requirement, signalling that capital cost was a recognised barrier to compliance.

Non-domestic industrial consumption — driven by semiconductor fabrication, petrochemicals, and data centres — is projected to reach 70% of total demand by 2065. Voluntary instruments and price signals cannot change process-determined industrial demand without affecting production. Mandatory technical standards — beginning with the 50% recycling rate for wafer fabrication plants from January 2024 — impose infrastructure requirements that produce demand reduction regardless of the economics of compliance relative to purchased water cost.

300,000 smart meters transmitting at 15-minute intervals provide consumption data at a resolution that enables real-time leak detection, abnormal use identification, and household consumption feedback. The 15-17% household saving attributed to smart metering reflects the combined effect of leak detection, real-time feedback, and social benchmarking — behavioural responses not accessible to households receiving only monthly aggregate bills.

Desalination is deliberately capped at approximately 30% of supply because it is the most energy-intensive production route in the portfolio. Demand management that contains total demand growth reduces the absolute volume of desalination production required by 2065, reducing both energy cost and carbon exposure. The demand management and desalination cap decisions are interdependent: the cap is sustainable only if demand management is effective enough to constrain production growth below the cap threshold.