You don't even have to boil it, technically. Most pathogens die at a much lower temperature, given enough time. For what it is worth, our backwoods trip had u

You don't even have to boil it, technically. Most pathogens die at a much lower temperature, given enough time. For what it is worth, our backwoods trip had us looking for clear, running water that had a small amount of green stuff growing in it, on the theory that if it wasn't killing greenery, then it wasn't killing you. Then, a treatment with off the shelf iodine tablets. No filtering needed. The iodine added an unpleasant taste, but I thought that was better than the gut-crunching alternative. http://www.who.int/water_sanitation_health/dwq/Boiling_water_01_15.pdf http://www.who.int/water_sanitation_health/dwq/Boiling_water...