Don’t like the tap, eh? One sure-fire method to purify water is to boil it. This will certainly kill of any harmful bacteria. If you’re out in the wild, you’ll want to first strain your water and then boil it. If the water is extremely unsafe, there are tablets, filters and distillation tanks that you may use to further purify the water. One new method on the market is the UV purifier. This method is now available at most sporting goods stores and online.