I think Volvic actually has a pretty high mineral content:http://www.mineralwaters.org/index.php? ... arval=2761http://www.mineralwaters.org/index.php? ... arval=2761
This is a great site for the mineral water aficionados. I just drink Brita-filtered tap water or boiled tap water (like most of HK) down here at work since I haven't brought the spare Brita down here yet. Incidentally, HK being granite and basalt (volcanic rock), our local water should have a somewhat similar mineral content, although of course our water is treat and diluted with treated river water from China.
Of course, not everything in the water is listed on the label, particularly in China, so if it tastes funny, run.
Distilled water would have the lowest number of solutes. I may have to try some later today to see if it makes a difference.
Mineral water is a great business: even in the US, lots of 'spring water' just comes from municipal water supplies.