>>2752433>>2752433>first, filtering through a sawyer squeeze to remove viruses, bacteria and cystsA Sawyer Squeeze will NOT filter out viruses, pretty sure the Zero won't either. The Grayl supposedly does.
Viruses aren't usually a concern for your typical backcountry camping trip but they absolutely are in a natural disaster setting or in areas with a lot of agriculture. You'll probably want to carry some aquatabs or other chemical water purifier as well.
I wouldn't worry about the ag chemicals though, my expectation is that risk from ingesting shit like that comes with repeated or heavy exposure. Sure, pesticides and shit aren't good for you but in an emergency setting for just a few days I doubt it'd matter.
I could be wrong though. I'm sure you can find some water quality studies of various points along the Colorado. Find out exactly what contaminants are floating around in there and at what levels of concentration, then hop on pubmed or wherever and find out whether those contaminants actually pose any sort of acute danger.
>>2752620>If something that bad ever happensWhat do you mean "that bad"? Do think the only reason someone might need a 72h bag is because of nuclear war or some other post-apocalyptic fantasy?
You really going to put a bullet in your head over some local flooding or a bad hurricane?
