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10

Filter the water right away, when filling the bottle. This way I'm sure the water inside the bottle is safe for drinking. This. Why? The main point for me is accessibility of that water. If you come to a situation where you need fresh water, then it may not just be because you've set up camp, you've got a while to spare and you feel like a drink. It ...


6

If I am using a water-pump filter. Is it necessary to combine this with a water purification tablet? As discussed in this answer and at greater length here, the need to treat backcountry water before drinking it is largely a myth. Neither the filter nor the tablets are needed. You're better off focusing your efforts on avoiding the real reason that ...


6

The bottom line is there is always SOME risk. Whether to take that risk or not is your choice. Fast running + isolated + high elevation = prettttty low risk. With that said the biggest concern is, unless you are drinking right from the source, you have no idea what has happened upstream from you. There could be a dead animal snagged in the stream, animal ...


5

I think your assumptions are correct. To my knowledge in a mountain environment you are quite safe as long as you follow some simple rules, which you mostly already named: The water was not standing, i.e. it comes from a stream that is rather fast and the stream is big enough that it is not just a connection of puddles or ponds where the water rinses ...


4

You can't tell by looking, and it's an issue that occurs naturally, not just because of industrial contamination. Even if you're hiking in a pristine environment like a national park, where this kind of man-made contamination isn't likely to be a concern, there can still be contamination from naturally occurring substances like arsenic. Natural blue-green ...


3

Just as an addition: For treatment and filter, I'd filter first, then treat. For 2 reasons: After a while, filters get alive and things start growing. Most of the chemical treatments work by oxidation. No use spending the oxidation capacity on stuff that can be oxidized, but could have been filtered out anyways.


2

I'm going to assume that you are employing the SODIS method of water sterilization. To sum up the details of the process, this method is where you fill plastic pop bottles, (PET), up with rather clear water 3/4 full, shake them up, and let them sit in the bright sun for 5+ hours. The mechanism this works by is by utilizing the UV radiation in sunlight. ...


2

A filter like that will will be good for 50 gallons even if it's used over two years. You'll want to make sure you dry it properly between uses, and some filters have boiling instructions (esp. those with clay ceramics) when they haven't be used for an extended period of time.


2

I assume that you are somewhere where the normal situation is that tap water is safe to drink. The order not to do so can result from analyses (water samples) failing the microbiological or chemical testing breakdown/repair of a pipe, so that the water can get contaminated (the order for that is usually that you should leave the water running until the ...


2

I use a Sawyer Squeeze filter and its pretty quick, light, and easy. You fill up a pouch that looks like a big Capri Sun and then just squeeze it out through the filter into your bottle or bladder. It comes with both a filter cap and a regular bottle cap, so if you were in a hurry you could fill the pouch at the water source, cap it, and filter it later. ...


2

I currently use a Sawyer Filter without using purification. I carry iodine tablets as a backup. Iodine's been in use for decades, and I don't worry at all about using them when necessary. Ray J. recommends being smart about choosing your water sources, which I am. When I was a kid I drank straight from the streams without any purification or any problems, so ...


2

Polar pure, the most effective water treatment product availble, is now back in stock and availble for sale on amazon.com I would like to thank everybody for all there support, it was an unfortunately long process due to the "meth heads" that were using iodine, the same chemical used in polar pure, to make crystal meth. This caused the dea to create much ...


2

Polar pure is now back in business and availble for sale on amazon.com


2

Fecal contamination should not really be an issue unless someone is already sick. Recent research has suggested that even eating ones own poop should not make you sick. Fecal transplants is a new way of treating some issues that fomr from a lack of flora in your gut. http://gawker.com/5985723/can-you-eat-your-own-poop. I for one would use something to ...


1

If you are being asked to boil water it has a biological contamination. Boiling would have no beneficial effect on chemically contaminated water. With this in mind, any chemical treatment would be sufficient as would a specific dilution of household bleach.


1

Without getting into any specific recommendations, pretty much any decent water filter you can find will get you through well more than 20 liters and several days. By decent, I mean the standard ones you will find at a good outdoor shop: MSR, SweetWater (now also MSR), Katadyn, PUR. I've used filters with large groups (10 people) for 8 days. Assuming 4 ...


1

I would say that most filters will do just fine with 20 liters of water without the recommended maintenance. If there was one I would consider it would be Sawyer Squeeze. The Squeeze is a hollow fiber filter which can be forced (squeezed). It is affordable, reliable and simple to use. The water is available immediately; you can even drink as you filter. I ...



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