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32

Assuming you don't have a genitourinary tract infection, fresh urine should be sterile, the problem is that it is a waste product which, apart from making it not taste very nice, means that consuming it will increase the concentration of waste in your body which will require an increased volume of water to absorb and subsequently excrete, resulting in you ...


30

Dehydration will very quickly reduce your ability to undertake the activities required to survive and so finding and conserving water should be a very high priority in any survival situation. Clearly there are potential dangers associated with drinking contaminated water but these need to be weighed against the dangers of dehydration. As with most survival ...


28

Another option is to keep your water bottle inside your jacket and use your body heat to prevent the water from freezing. Many mountaineering jackets have internal elasticated mesh pockets for this purpose. Alternatively, I find I can just put the water bottle inside my jacket and use the waist belt of my rucksack to prevent the bottle from falling down ...


26

Copy and paste from the answer here: http://skeptics.stackexchange.com/questions/1540/is-it-a-good-idea-to-drink-your-own-urine-in-a-survival-situation Summary: You can do it, as a last resort, but it's dicey. The US Army doesn't think it's a good idea and lists it on its "Do NOT drink" list, stating in its Field Manual that it "contains harmful body ...


26

It is likely caused by iron in the pump or pipes. According to the Illinois Department of Public Health: Iron is mainly present in water in two forms: either the soluble ferrous iron or the insoluble ferric iron. Water containing ferrous iron is clear and colorless because the iron is completely dissolved. When exposed to air in the pressure tank or ...


25

How much sea water can I safely drink? = None If you drink sea water, how much fresh water do you need to drink to off set the sea water you drank? = 2.8 units of distilled water per 1 unit of sea water (to neutralize without adding hydration) The "scientific" answer to this question involves a lot of complex math, human physiology and significant ...


24

As a former soldier (and Medic), I personally don't flavour my water during the outdoors. The contents of the canteen/flask might be required for a non-drinking purpose such as: Eyewash Rinsing Medical Cleaning etc However, I do flavour my water on a day-to-day basis for the gym etc using super-concentrate micro capsules such as Squash'd If you have ...


24

Generally speaking, no. Arguably you should never go for out for any kind of extended exhausting activity without ensuring proper hydration, i.e. packing enough fluids at least for your immediate needs. The life straw will allow you to purify water sources you find up to a certain degree, but some concerns remain: You first need to actually find water ...


23

First things first. You do not need to purify all water sources. Just because it is not out of a tap does not make it immediately dirty. Most fresh wilderness water (providing it isn't stagnant, etc.) is fine for drinking. You should be familiar with the source of the water. Just because the river looks clean doesn't mean that an industrial unit isn't ...


22

Should I understand a water source to mean a spring/well, or any place where hikers may collect water (streams, lakes, etc.)? Yes. Any source of water - no matter how large or small - should be avoided when choosing a camp site. 100 meters is just a guideline, 200 meters is better. 200 meters and out of sight is great. The reasons are several-fold: ...


20

Urine is normally sterile (barring urinary tract infections) - so, from bacteriological stance, fresh urine isn't going to hurt. The problem is - urine is a waste product, and so is full of stuff that your body wants to be rid of. Worse, as you get more dehydrated, your body produces more concentrated urine. That said - as a short term measure to keep ...


19

Via WebMD Large amounts or long-term use of iodine are possibly unsafe. Adults should avoid prolonged use of doses higher than 1100 mcg per day (the upper tolerable limit, UL) without proper medical supervision. However I seriously question that 1100 mcg number because people in Northern Japan have been found to consume over 80,000 mcg per day due to a ...


19

If it is clean, fresh snow, it is safe to drink. This is basically drinking rain water. It hasn't had time to pick up pollutants when it is newly fallen. I live in New England, and kids do this all the time. You get taught early to only do this with white snow. Make sure that the snow is actually clean: the longer it sits, and the more urbanized an area is, ...


18

I led extended backpacking trips in Grand Canyon country for several years, and we required everyone carry at MINIMUM a gallon (almost 4 litre) per person per day -- which adds up. (Though rarely did we plan trips that did not have dependable water sources within a day's walk, meaning we would start and end the day with bellies full of water.) Different ...


17

It depends very much on the specific geography. But the idea of "whirlpools" that suck down people or entire ships, never to be seen again (which I suspect is what fascinates you) is largely a myth. The dangers aren't any different (and typically much smaller) than those posed by whitewater rapids in rivers. Specific dangers are: Being knocked against ...


16

Freeze the bottles, then keep them together if possible. Any insulation around them will help.


16

Don't fill the container. You can't win in a battle against the laws of physics. Water expands when it freezes, so you need to leave some room in your bottle to expand. What I find works best is to fill your bottle just over half, then freeze it on it's side. This will give the ice more room to expand than if you freeze it upright. When you grab your bottle ...


16

The question doesn't state what geographical area it's about, and it really isn't possible to give an answer that covers everything. In this answer, I'm only going to deal with pristine backcountry areas in North America, such as the Sierra. In order to interpret the scientific evidence properly, it's necessary to understand some scientific background about ...


15

CamelBak have a great Care & Tips section on their website. Summarising their recommendations: Keep it clean and dry when not in use. If mould develops: Use hot water and two tablespoons of baking soda or bleach Leave for about 30 minutes Wash with hot water and mild soap Air dry


15

In dry climates you can take advantage of evaporative cooling - especially on a bike. In hot and humid places you are stuck with insulation and pre-cooled water and/or ice. Have you experimented to see if a cloth wrapper around your bottles is enough to cool things when damp? Of course, you're not going to get highly chilled water, but it can be ...


15

If you run out half-way, perhaps you should bring twice as much? That being said... One option for day hikes is to hydrate well before hitting the trail. Also, have readily available water for your return. e.g. leave a water bottle in your car. An other option is refilling from natural water sources during the trip would allow you to consume an adequate ...


15

The effects of drinking distilled, deminieralized, deionized, and many other forms of water purification have been thoroughly studied and despite the research, the jury is still out on the subject, with regards to temporary usage. As far as adventuring goes, it appears it does not matter, as long as the water you are drinking is microbiologically and ...


13

Hiking in the desert? As much as you can carry! I tend to prefer packing more water than less, and especially in a desert area where if something goes wrong, your access to resupply is very limited. You can lose up to two quarts (almost 2 litre) of water per hour hiking in the desert in middle of the day, but you can only absorb around one quart (almost one ...


13

The rule is 3 liters per person per day. You may get away with 2 liters if it's not too hot and you stay moderate. Keep into account that your "normal day" intake is skewed by the contribute brought from food. If you eat food with less water in it, which is likely during a hike, your need for actual water is higher than the one you experience in your daily ...


12

500 ml and 20 oz water bottles from a convenience store will freeze without breaking. You can carry them inside your clothes, in your pack next to your body, and keep them inside your sleeping bag to help keep them from freezing.


12

You always look at places where water could accumulate (here are some not so obvious choices): Extra green vegetation like sycamore tree is good indicator of water source. You can utilize the plants transpiration via plastic bag or bottle. And just leave it out in the sun. With big enough plastic bag over bush you can collect quite a bit of water. Bellow ...


12

You need to distill it - I'm assuming that freezing is not an option (unless you're camping in the extreme latitudes). This is easiest, as the ice on top is almost pure water. Where you don't have a freezer available - boiling the water, capturing the steam and condensing it back to water will provide pure water.


12

Distilled / deionized (as for lab purposes) water tastes stale. So do reverse-osmosis drinking water, and cooked water: this is attributed mainly to the lack of CO2 / HCO3⁻ compared to fresh ground / tap drinking water. Yes, you can encounter distilled water in outdoor situations. In winter it lies around on the ground as white powder... Lots of people have ...


12

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 ...


12

The usual advice to someone in an emergency situation in the wilderness is to stay put, so that it's easier for rescuers to find you. In this situation, performance isn't an issue. There is a folk belief that "thirst is too late," and that people are commonly dehydrated without knowing it. If you believed that, then you might drink some of your water even ...



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