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The pH of mineral water is often thought to have a pH value of 7 (neutral). That is not the case. Most mineral waters are slightly acidic in value, ranging from 5.7 to 7. The value varies according to the mineral content of the water, and this is in turn affected by the type of earth from which the water is drawn. Water which was percolated through a hard rock, like granite will have a higher mineral content, and will thus tend to be more acidic.

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8y ago

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