Learn the Facts About bottled water

[FitoPharmer]

This is what I have been told on drinking pure water:
Drinking tap or filtered water, does not have any direct impact on your mineral/vitamin uptake unless you are drinking good "mineral water". Even then intake is minimal, plus most people do not use mineral waters as any kind of significant nutrient uptake anyways. So drinking really pure water would only have an effect on your body at the excessive side of the scale. Pure water will make water intoxication, or Hyponatremia develop faster.
http://chemistry.about.com/cs/5/f/blwaterintox.htm

P.S.
RO/DI coffee IMO tastes way better.
and i'm not sure on this, but in my mind since your drinking water is also powering your bodies waste filtering systems that the purest water will help it work better. I.E. ~1 TDS can absorb more toxins then +100 TDS water.

[RCFA]

Many experts now agree that if you live in an area on a municipal water system, then there is little you need to be worried about. Canada has some of the best water and testing practices in the world and the only real concern is Chlorination by products. Chlorination byproducts are chemicals that result from the reaction of chlorine with organic substances in water. In areas with high TDS events or older water delivery systems, larger amounts of chlorine are required to provide acceptable deactivation levels of pathogens in the water. This greater amount of added chlorine then reacts with the organics in the water and on the pipe walls which react to for these disinfection by-products. Trihalomethanes (THMs) refer to one class of disinfection by-products found in nearly every chlorinated public water supply to some extent. The most prevalent is chloroform (trichloromethane), a THM which is carcinogenic to rats and mice. The principle method for removal of chlorination by-products like chloroform is by activated carbon adsorption. So what is generally recommended, and what I do is run all my drinking water through an activated carbon filter (Brita, undersink, refridgerator). I drink exclusivly Calgary/Vancouver tapwater filtered through carbon and feel that it is the best for me and my family as well as the Environment.

PS Brita Filters can be recycled. Google it!

[RCFA]

Most municipalities publish their water quality reports online. If not, they are available upon request and are easily assesed for acceptability. TDS alone is not a good indicator of the overall water quality or "safeness to drink." There is no evidence that drinking hard water opposed to soft water has any effect on the body as far as I'm aware. If you are really concerned, find your local water quality report and post a link or PM it to me or just compare it to health canada's guidlines, or the EPA's.