4 ways to ensure you have clean drinking water in the backcountry

#4  ULTRAVIOLET LIGHT

With enough time—six hours at least—the sun’s UV rays will kill all pathogens in a bottle of water. You can speed up the process with a portable UV-treatment system, but it will require batteries (and extras) and will only work in a compact container—something to consider when you’re packing for a days-long outing.