Marshman,
I have passed the factory in Perthshire manys a time. Its defo NOT tap water originated. Also our water is far softer than East Anglian, as many a southerner on holiday up here has found out, by using too much shampoo when showering lol
The history of the company is here. http://www.highlandspringgroup.com/about-us/history/
However, one thing I forgot to say, in my original post was, when I shower on the boat, about a week or so on return home and applying my med creams to my skin, ( I am a Psoriasis sufferer) My skin has shown signs of improvement. It may just be coincidence, but hey I like it!
Iain.