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Water Tariff. The Water Tariff covers the costs incurred in various stages of water production process — collection of rainwater, treatment of raw water and distribution of treated potable water to customers through an extensive island-wide network of water pipelines. The Water Tariff is charged based on the volume of water consumed.
According to the national water agency PUB, Singapore had just two water sources 50 years ago. Today, there are four, and the water supply can be divided into "four national taps": local catchment
