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Re:Disaster prepping is mainstream again by bigbubba on Wednesday November 11, 2020 @12:50PM (#25060734)
You can also render water relatively safe to drink using small amounts of bleach. I've done it a few times whilr camping. EPA.gov has instructions for it, you only need a few drops of bleach per gallon (roughly 3.75L) of water. One large bottle of bleach is enough to purify water for months at least.

https://www.epa.gov/ground-water-and-drinking-water/emergenc...

Re:Disaster prepping is mainstream again by cdubzzz on Wednesday November 11, 2020 @12:59PM (#25060856)
In Peace Corps we used a filter bucket and added bleach. Took very little bleach, though I don't recall how often we had to change the filter. It was essentially this: https://www.outbackwater.com/outback-5-gallon-gravity-powere...
Re:Disaster prepping is mainstream again by ghaff on Wednesday November 11, 2020 @01:01PM (#25060884)
It's probably a bit safer (easier to control) to use iodine which I carry for camping, even if only as backup. Once it's done it's thing, you can then put in some Vitamin C to neutralize most of the funny taste.
Re:Disaster prepping is mainstream again by akvadrako on Wednesday November 11, 2020 @02:26PM (#25061896)
I don't think Iodine is safe to use for long periods.
Re:Disaster prepping is mainstream again by firethief on Thursday November 12, 2020 @12:33PM (#25072236)
Thru-hikers use it for six months at a time. It's safe enough for emergency use for someone with no preexisting thyroid issues.
Re:Disaster prepping is mainstream again by akvadrako on Thursday November 12, 2020 @03:14PM (#25074315)
But you don't know if you have pre-existing thyroid issues. Prolonged use should include monitoring thyroid function.

see https://www.cdc.gov/healthywater/drinking/travel/backcountry...

Water that has been disinfected with iodine is NOT recommended for pregnant women, people with thyroid problems, those with known hypersensitivity to iodine, or continuous use for more than a few weeks at a time.

Re:Disaster prepping is mainstream again by firethief on Friday November 13, 2020 @09:20AM (#25082376)
Ok, so if clean water is unavailable for more than a few weeks, hop on down to the clinic and trade some ammo for a thyroid checkup? If you're planning for the end of the world, then yes you'll want a backup water plan. For realistic emergency scenarios iodine is a practical water treatment option.