One of the Moraine’s most important functions is that it acts as a water recharge and discharge system. Permeable sands and gravel absorb and collect rain and melted snow, which then slowly filter into the deep aquifers, or wet underground layers of water-bearing permeable rock or unconsolidated materials, below the ground. This groundwater is then used in private and public wells across the Moraine, providing clean drinking water to more than 250,000 people. It is because of this function that the Moraine is often described as southern Ontario’s rain barrel.
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