Instructables
video Two ways to purify water with fire.
I made this because everytime we go up to our local forest, we forget water but we always have a lighter so now we can purify the water just make sure its on for at least 5 min, max 25 min.
EvonyS4 months ago

I disagree, SirMeatwad, because you could boil all your water away (it will evaporate), leaving you with none. I've read one minute at a rolling boil is OK at sea level, but for higher elevations you need up to five minutes. I've never heard 25 minutes before this. Interesting video, although a bit hard to watch with the camera moving so often and not focused on what you are doing.

SirMeatwad1 year ago
There really shouldn't just be a time limit, to be safer, you should wait until it totally boils.