Here you go....
This is where boiling water comes in. Of all the ways to make water safe to drink, boiling remains the number one most foolproof method. The materials required to boil water are to be found nearly everywhere, or can be improvised. A source of fuel and a way to ignite it, and a pot of some sort. Short of using a pot to boil water, you can use tin foil or even a tightly woven basket into which water and hot rocks are added.
Boiling destroys all disease carrying organisms, including viruses. And when you have boiled water there is no mistake that you have indeed succeeded in your goal of making water safe to drink.
How Long Do You Need to Boil Water?
How long do you need to boil water to make it safe to drink? There are a number of misnomers circulating around out there about the time to boil water. Ten minutes seems to be a commonly quoted figure. Actually, all it takes is to get the water to a good rolling boil and then your done. Thats it. Once the water has reached the boiling point there is no need to continue, and to do so is merely wasting fuel.