Calcium In Water: The Downside
Minerals and metals vary tremendously in the water systems across the country. One mineral in particular, calcium, makes water feel hard and causes difficulty in completely rinsing off soap or shampoo when present in larger amounts.
Calcium also encourages oil production, making the skin more prone to breakouts. It can turn oil from the sebaceous glands into a waxy substance that ultimately causes whiteheads and blackheads. You may be especially susceptible to calcium's catalytic tendencies if you have a genetic predisposition for acne.