can microfilter waterbottles filter out everything bad like even bacteria, orr do i still need to boil the water.
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can microfilter waterbottles filter out everything bad like even bacteria, orr do i still need to boil the water.
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Any filter system will have a lower limit on the size of particles that it can filter, so the added step of boiling will always be advisable to make sure that you get viruses, smaller bacteria and cysts/spores that your filter may not handle. A VERY small quantity of bleach (like 1 small drop per gallon) or exposure to UV light can also help control some of those water-borne hazards, but boiling is still advisable.
You also have to weigh your immediate need for water - if you will die of thirst before you can get the chance to boil water, go with what your filter will give you and take your chances.
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As long as you don't venture to third world countries, a quality filter will take care of any biological nasties in the water. They will not, however, take care of industrial pollutants, nor most viruses. The good news is that these things rarely occur in the places where sportsmen spend their time. Here is a FAQ that might help:
http://cascadedesigns.com/MSR/FAQ/Water-Treatment-and-Hydration
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In this day there is no such as a clean mountain stream. Free ranging cattle on summer range, beavers in their ponds and lodges, etc. Wild water needs to be purified. If you think you are dehydrated now wait until the diahrea does a number on you. Either boil it, treat it for the full three hours to kill the hard shell cysts, or filter it. There are micro filters and there are purifiers, A purifier with a filter of .004 microns will filter out everything viruses and all.
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