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Drainage Network


Two-thirds of Singapore's land area is used as water catchment. Rainwater that falls on these areas is collected through a network of drains, canals and rivers before it is channelled to our 17 reservoirs. This makes Singapore one of the few countries in the world to harvest urban stormwater on a large scale for water supply. 

At the same time, PUB has taken a more proactive approach to the design and management of our nation’s drainage systems in response to more intense storms and continued urban development.

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Reservoirs Blue Map of SG 

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