Brita is an example. If you want distilled, then distill.
If you don't mind the expense.
Point is, with a little knowledge, I -- or you -- can tear anything apart and make it look bad. So, bad as tap water is (it isn't), I can make "healthful" bottled water look worse.
I'd still not waste money on bottled if possible. I'd filter and/or distill.
Chattolanee Spring, Greenspring Valley Road, Pikesville, MD. Artesian spring. 100 years ago was great, now ruined by golf course runoff.