Tag Info

Hot answers tagged

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 ...


8

There is typically no need to purify water collected from natural sources in the wilderness. For example, in a survey of 69 sites in the Sierra, every site had concentrations of Giardia cysts much too low to make anyone sick.[Rockwell 2002] The perception that backcountry water is unsafe to drink without treatment is folk wisdom that is controverted by the ...


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 ...


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 ...


5

If safety is your primary concern, then the only two methods can guarantee safety from major contaminants (microbial or otherwise) these are Distillation and Reverse Osmosis Distillation Boiling alone will leave most contaminants in the water, such as heavy metals, hydrocarbons, etc... multi-stage distillation will both kill pathogens and leave most ...


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 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 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 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

I have gone through several filters, and have cleaned them many times. There are a few steps to doing this though. What you'll need... muriatic acid, 2 buckets, long plastic stirrer, face mask, high pressure hose, safety glasses, heavy duty gloves, water, and your filter Move to a well ventilated area. Outside is best. Begin by putting half a gallon of ...


2

If you still have your PolarPur bottle you can purchase crystal iodine off of ebay. Look for this seller, "ibmsuccess2010", he sells and ships from Lithuania. I place a quarter teaspoon of the iodine back into the PolarPur bottle and it will work like new. The seller packages and ships very discreetly. The amount if crystal iodine you will get will probably ...


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 ...


1

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 ...



Only top voted, non community-wiki answers of a minimum length are eligible