I drink bottled water, not for "health reasons", but because the tap water in my neighborhood tastes bad due to high mineral content (22 grains, nearly saturated). I've tried water filters (like Brita), but they don't take out dissolved solids. The answer is a Reverse Osmosis filter, and I just haven't gotten around to installing one.

I refill gallon jugs at the grocery store, where they have a high capacity R-O filter. Much cheaper that way, since most of the cost of bottled water is the bottle.