16 votes

is water filter log reduction multiplicative?

No. Filters don't work like that, though there can be some benefit to double filtration as I'll explain below. I don't know the mathematics of it though. Basically what happens inside a filter is that ...
bob1's user avatar
  • 10.2k
6 votes
Accepted

Water treatment for washing - are purification tablets best option, and how many are needed?

Boiling is the most effective and cheapest method of cleaning up this much water. It does require some faffing about boiling volumes, letting them cool before putting in storage containers, then ...
bob1's user avatar
  • 10.2k
3 votes

Is my water filter defective?

Based on what you said, I'm pretty sure you've ruined the water filter. If you're sick after using the filter, then it's not doing its job anymore. Now, let's look at some facts: I hiked near ...
Diablo's user avatar
  • 103
1 vote

is water filter log reduction multiplicative?

GearSkeptic on Youtube believes that log reduction is in fact additive but has no specific research to back up their opinion: See: Backcountry Water Treatment, Part 3: Microfiltration Transcript from ...
jhnc's user avatar
  • 231
1 vote

Is my water filter defective?

"@noah If you are getting sick from filtering bottled drinking water then it's clearly the filter" I took that advice and it is the filter(0.1 micron). It is not the pouch, I used bottle. ...
Alex J.'s user avatar
  • 1,155

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