Some people will believe anything.
The western US suffers from alkaline water and we've spent 150 years making drinking water better, i.e., getting rid of the alkalinity.
You want alkaline? Add any alkali to it: sodium or potassium hydroxide, baking soda, borax, grocery store washing soda.
You want acidic water? Vinegar is the obvious choice.
Just drink water from the tap. Most drinking water in the US is great stuff, unlike before that nasty gummint EPA got involved.