In this post we'll look at commercial brands of bottled water that resemble water from the Speyside, Highlands, and Islay regions of Scotland.
We saw before that different waters bring out different properties in scotch whisky.
We can then look at properties of bottled water from Scotland. Thanks to UisgeSource, we can look at the properties of Highland, Speyside, and Islay water that they collected. See this post for more details.
But as this water isn't available everywhere yet, we can look at their water analysis and try to find other bottled water that is somewhat close in pH level and mineral content.
For reference on mineral waters, I used the book Fine Waters, which I wrote about here and here and here. The mineral content for all mineral waters is available online, so you can look up other brands to see if they match Scottish waters. Fine Waters is a few years old, so it is possible the numbers have changed on some waters.
Also note that the UisgeSource numbers are approximate based on information on their website and tests I conducted at home.
The closest bottled waters to UisgeSource water are bolded. Note that I've never heard of any of those Islay-style water brands.
Update: If you want to help look for other bottled waters most resembling Islay waters, check out this ordered list by pH on MineralWaters.org and see if any waters that you have heard of are a good match for pH and TDS. And let me know!
So, should you want to try diluting whisky with different regional-style bottled waters, this should give you some starting points on how to do so.
The above images were taken from slides I presented at the Tales of the Cocktail convention in July 2013.
The Water Project on Alcademics is research into water in spirits and in cocktails, from the streams that feed distilleries to the soda water that dilutes your highball. For all posts in the project, visit the project index page.