How long do you have to boil water for it to be drinkable?

(Natural News) In an SHTF situation, knowing even the littlest of facts can spell the difference between life and death. Or in a normal day, the difference between comfort and the constant need to go to the bathroom. (h/t to DoomAndBloom.net) Take water, for example. Despite its abundance in our surroundings, not every drop of...