You may have heard many claims about the health benefits of alkaline water. Some say it can help slow the aging process, regulate body pH, and prevent chronic diseases like cancer. But what is alkaline water and why is it so loud? The “alkalinity” of alkaline water refers to its pH level. The pH level is a number that measures the acidity or alkalinity of a substance on a scale from 0 to 14.Alkaline water has a higher pH than normal drinking water. For this reason, some advocates of alkaline water believe that it can neutralize acids in the body.