evidence: Of all the things to consider about hydration, the health effects of pH on drinking water probably don't cross your mind. However, alkaline water has a host of supposed health benefits, from helping the body clear toxins to improving metabolism. [...] Acidic things have a slightly sour flavor, so some people simply prefer the taste of ionized (alkaline) water. Some commercial alkaline water is produced by the addition of minerals, such as magnesium and calcium, adding to its supposed health benefits. It's worth noting that acidic water has no such healthy reputation, so you wouldn't be alone if you're wondering about the positive and negative health effects of pH on drinking water. [...] Therefore, as far as the EPA is concerned, the health effects of pH on drinking water as it pertains to the human body do not warrant a public health concern. That said, abnormally high or low pH water — while not usually a health threat on its own — may cause indirect health effects by corroding the metal pipes through which it travels, according to the Water Research Center. It may also signify the presence of pollutants.