give me a break. Just boil the water ya nuts.
Do you have enough fuel set aside to boil gallons of water every day?
Not everyone does, I would bet most don’t.
Boiling does not always work, it is time and altitude sensitive. Boiling water at sea level is at least 212 degrees F, at 8 or 9 thousand feet it is hard to get over 160 degrees F. The proper boiling time is also critical for a lot of organisms; Giardia being one of the hardest to kill and it is one tough little mutha, and it will kill you.