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For certain contaminants such as Giardia, it doesn't matter whether the water is running fast or slow. You will get infected regardless. So this idea about "fast water" is a myth that is not correct. If you are drinking close to the source of streams and there is not any mining activity or industrial pollution nearby, then OF COURSE you are drinking clean ...


Be aware of the difference between removal of harmful pathogens and removal of chemical contamination. Harmful pathogens include amoeba, bacteria, viruses, and worms, and these are effectively destroyed by the following methods: boiling water for 90 seconds kills all the above iodine and chlorine kills bacteria, worms and amoeba but not viruses filters ...

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