Can there be fresh water on an island?

If it's a large enough island, it may also have a water table (fresh water in porous rocks deep underground), which can be tapped by digging wells, or may come out of the ground spontaneously as springs. Such groundwater is rain that fell long ago and eventually percolated down through the ground.



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Ontario's Manitoulin Island is the world's largest freshwater lake island. It is also Canada's 31st largest island. Manitoulin Island itself has 108 freshwater lakes.

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Currently, desalinated ocean water is the primary source of drinking water, providing 90% of the potable water on the island, supplemented by groundwater (Water Sewerage Corporation, 2022b).

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