I want a clean source of water. Tap water here is awful (and they are going to flouridate soon!). I dont want to buy bottled spring water cos I reckon they are just some else's tap water in a fancy bottle and are SO expensive. I dont have a water purifier (though I could buyone I guess) but would a reasonable compromise be to boil water and then cool it before use - would this eliminate much that I don't want to be ingesting?