Alkalization is “a process that lowers the amount of acid in a solution.”
More specifically, it is the process of raising the pH to make the solution more alkaline (and less acidic). The EPA requires tap water to have a pH level between 6.5 and 8.5.
In most cases, water is on the low end of this value, but studies are showing that there may be some health benefits to drinking water that has a higher pH. Under-sink filters that alkalize your drinking water can often raise the pH level of your water to 9 or above by adding minerals.