I thought I'd add my two cents here...
Just a warning about bottled water. There have been various reports out about the quality of bottled water. I urge you to really know where the water comes from, with whatever brand you buy. There are few legal limitations for bottled water (as far as impurities and contaminates), so there is a chance that the water coming out of your tap is in fact "helathier" than that pulled from the groundwater. Then of course there are "marketing" twists where some bottled water are actually filled from municpal taps. I recently learned that "spring water" is a misnomer as well, a spring by definition is a pond that has water coming to the surface naturally, so this means you're really drinking pond water that is open to all sorts of pollution, and biological goodies. Water that claims to be "spring water" is usually collected by drilling down with a pipe "near" a spring source (which is techincally a well).
I guess my point here is to be careful. Know that there are a ton of bottled water companies out there and there are some "creative marketing" labels put on these bottles. Tap water is monitored many times a month, and must pass strict FDA requirements. Who do you trust more is all I'm saying.
One more... I stopped using my Brita filters... I noticed that the carbon from their filters would leak out into the water. I would like to drink water, not water with black carbon floating in it. (Fill a pitcher and let it sit for a week... look at the bottom of the pitcher, there will be a thin layer of black soot. Ewww.
Two links for further info:
and from the FDA:
Interesting post... I look forward to hearing other opinions.