These days, with the word spread about the benefits of alkaline water, it’s fairly easy to find. You can
purchase bottles of Essentia 9.5 pH Drinking Water from this page on Amazon, and there are also companies that sell products like ionizers, which they claim have the ability to make regular water alkaline through a chemical process called electrolysis. Makers of these ionizers say that the electricity used to separate molecules in the water, make it more acidic or more alkaline
http://www.naturallivingideas.com/alkaline-water-benefits-how-to-make-it/
I don't think alkalizing the water with additives would work...needs to be done with electrolysis.