Agnes - Member - The Prepared

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Reply to: Best portable survival water filters Posted May 10, 2022

No worries. That’s part of the reason why I posted, I was curious about more experienced ppl’s opinions. I have one that I currently only use when we have power outages in my area, which happens about 1-2x a year after the winter/summer storms. So no heavy use so far. I live in the city, if anything ever happened to our water supply it would be full of everything you can think of. I didn’t find any filter with a longer list of tested substances, so I liked it as a backup solution. I wouldn’t use it as my sole option. I was planning to take it camping this year to do more testing. The Malawi study showed that it was good for >1000 uses so ~3000+ liters but that’s obviously still limited. Then again, the MSR Guardian filter is good for 10000+ liters. Price-wise that seems comparable. When I was deciding on filters to buy I had read that the MSR filter also has a shelf life of 5 years or so but I can’t find that any more right now. So maybe the info is outdated.

Reply to: Best portable survival water filters Posted May 10, 2022

Thanks for the great article. I didn’t see a mention of this anywhere on the site, so I wanted to share. The Puralytics Solarbag is tested for viruses, heavy metals, petrochemicals, urine and all sorts of other stuff. Approved by EPA, WHO etc: https://www.engineeringforchange.org/wp-content/uploads/2015/08/SolarBag-Technical-Reports-18-Mar-2015.pdf There is a list at the end for all the contaminants it is tested for. It requires sunlight but still works on cloudy days, just takes longer. Quote from the linked pdf: “It is the only portable, non-powered water purifier that meets and exceeds the World Health Organization (WHO) standards for a highly protective device.”

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Reply to: Best portable survival water filters Posted May 10, 2022

No worries. That’s part of the reason why I posted, I was curious about more experienced ppl’s opinions. I have one that I currently only use when we have power outages in my area, which happens about 1-2x a year after the winter/summer storms. So no heavy use so far. I live in the city, if anything ever happened to our water supply it would be full of everything you can think of. I didn’t find any filter with a longer list of tested substances, so I liked it as a backup solution. I wouldn’t use it as my sole option. I was planning to take it camping this year to do more testing. The Malawi study showed that it was good for >1000 uses so ~3000+ liters but that’s obviously still limited. Then again, the MSR Guardian filter is good for 10000+ liters. Price-wise that seems comparable. When I was deciding on filters to buy I had read that the MSR filter also has a shelf life of 5 years or so but I can’t find that any more right now. So maybe the info is outdated.

Reply to: Best portable survival water filters Posted May 10, 2022

Thanks for the great article. I didn’t see a mention of this anywhere on the site, so I wanted to share. The Puralytics Solarbag is tested for viruses, heavy metals, petrochemicals, urine and all sorts of other stuff. Approved by EPA, WHO etc: https://www.engineeringforchange.org/wp-content/uploads/2015/08/SolarBag-Technical-Reports-18-Mar-2015.pdf There is a list at the end for all the contaminants it is tested for. It requires sunlight but still works on cloudy days, just takes longer. Quote from the linked pdf: “It is the only portable, non-powered water purifier that meets and exceeds the World Health Organization (WHO) standards for a highly protective device.”