Replied by Ted (Bangkok, Thailand)
Nina: Boiling water will kill the bacteria, but what you boil with can add extra heavy metals and increase certain chemicals that don't get evaporated, but get more concentrated such as dioxin, fluoride, etc. The best way to do it is perhaps boil water using a glass or stainless steel kettle as opposed to using aluminum. I have seen aluminum buildup in water after boiling. Stainless steel doesn't have that much heavy metal increases compared to aluminum but boiling in a glass kettle is the best. Adding activated charcoal during the boiling is a cheap way of removing fluoride and other unwanted compounds. Ted
