In cities, water scarcity and increased demand for water, are becoming growing issues, alongside climate change and rapid urbanisation. In this context, Singapore, a city-state, only offers limited water resources.

Harvesting rainwater is thus a natural extension of pre-existing strategies to reduce, reuse and replenish water sources in Singapore. As approximately 86% of Singapore’s population lives in high-rise buildings, rooftop water collection systems have been installed to maximize the use of rainwater and act as a catchment. The rainwater is collected in tanks and used for toilet flushing, helping to reduce water consumption, save on energy and reduce other costs within the buildings.

Integration across sectors and disciplines, and reworking city-wide master plans that promote policy alignment, are vital. Working with local communities and other stakeholders to ensure the knowledge and capacities are also key elements for a successful implementation

Rainwater harvesting and management contribute in reducing water consumption and provide drinking water, mainly by alleviating stormwater runoff, and thus tackling to the growing issue of water scarcity.

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