what i did was bought one of these ...
http://www.bigberkeywaterfilters.com/be ... sage-p-190
you absorb more of the harmful chemicals in the water when you shower than you do when you drink it. i think it's like 10x more! especially when you take a hot shower. many of the chemicals require heat to be activated. not only do you absorb it through contact with skin but you inhale the steam too.
you really don't need to drink hardly any water at all on this diet. every now and then it is nice to have a glass of water though. buying a shower filter, you kill two birds with one stone, unless you're worried about washing dishes with too or don't feel like filling up your glass in the shower.
btw, the filters on the berkeys last about 9 months to a year, depending on how often you use it.
the next step up is buying one of these bad boys ...
http://www.ecoloblue.com/home-office
"the purpose is not to disengage from the physical universe. the purpose is to manifest the essence of what you are so completely that you are an aspect of the creation of the physical universe."