You can start with a carbonation water machine, like a SodaStream, Soda-Club, or the previously reviewed home system, and then you can add minerals to make your own artisan mineral waters. There are several ways to calculate how much mineral you need to add. In general you start with an analysis of your tap water (often provided by your water company), then you get a list of branded mineral waters to imitate, and then use a spreadsheet to figure out how much mineral to add. Of course you can also refine your own personal mix that suits your taste, too. Finding a source for the minerals is a little bit trickier, but I suspect selling such salts will soon become a small cottage business for someone (if you know of a source let me know in the comments.) Right now check out this tutorial which tells you how:

How to Clone Mineral Water, Edible Geography

Mineral water salt 460

A spoon full of mineral salts is required for the preparation of 1 liter of San Pellegrino mineral water. Image from Khymos, Mineral waters a la carte

One of the commentors on the Khymos blog noticed that Burton salts, used in beer brewing, and available from supplier like AHS, is very close to the mix of the salts in San Pelligrino mineral water. A quick experiment awaits…

(Has anyone tried more than one off-the-shelf home carbonation machine and would like to recommend the best one?)

— KK