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How can NMW be fresh if it takes 15 years to filter though the rock strata?

April 26, 2017filter fresh NMW rock Strata takes

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How can NMW be fresh if it takes 15 years to filter though the rock strata?

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The term fresh here is misused. Whilst water is travelling through the rock strata it is protected from bacteria, as it continues to be filtered by the rocks. The lack of oxygen and cooler temperature underground minimises bacterial presence also.