Can you drink snow water?

Freshly melted snow is generally considered to be safe to drink without further treatment, however it should not be assumed that because water is frozen that it is safe to drink. Exercise the same caution for melted Ice as you would for standing water, and if in doubt boil the water for 10 minutes.

dryadbushcraft.co.uk - Obtaining Water from Snow and Ice - Dryad Bushcraft

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“Water Water everywhere, nor any drop to Drink” Samuel Taylor Coleridge (The Ancient Mariner) When Coleridge wrote this poem about a ships crew dying of thirst while surrounded by Water he was of course referring to life at Sea. However, the same predicament can befall those who venture into glacial or polar environments without the necessary equipment and knowledge to convert Ice and Snow into drinkable water. Water is essential to life, and the ability to transform water from its frozen state into its liquid state is a vital skill for those who intend to spend time above the snow line. In order to learn this skill it is important to first understand the unique properties of water.

Here’s the science bit.

Water only remains in its liquid form while its temperature is between 0 degrees centigrade and 100 degrees centigrade (This range can vary slightly depending on altitude). Above 100 degrees centigrade Water will boil, and transform into a gas (Steam). Below 0 degrees centigrade Water will freeze and become Ice or snow. Most mountaineers, and explorers travelling in cold environments, carry modern stoves which use liquid fuels such as Unleaded Petrol, Propane Gas, or Coleman fuel in order to melt Snow. The important thing to remember when melting snow is never to fill the pan to the top with Snow to begin with. Snow is an excellent insulator and can cause the bottom of the pan to burn through rather than melting the snow. The best way to melt snow is to collect clean (Definitely not yellow) snow from outside the camp site. You should then put a small amount into the bottom of the pan and heat gently until it melts (Snow is mostly composed of air so it will require a surprising amount of snow to produce a litre of water). Keep adding small handfuls until you have melted the desired quantity. It is a good idea to cover the top of the pan to conserve fuel. If you are in an area with Trees or other fuel the same result can be obtained over a fire. Freshly melted snow is generally considered to be safe to drink without further treatment, however it should not be assumed that because water is frozen that it is safe to drink. Exercise the same caution for melted Ice as you would for standing water, and if in doubt boil the water for 10 minutes. Micro organisms and Germs are not killed by freezing (They just remain dormant until the ice melts). If you do not have a heat proof pan you can still melt snow and ice by suspending over a fire and allowing the melted water to drip into a container. Snow can be wrapped in a tee shirt or other porous item and supported using sticks or ski poles. If you are melting hard crust snow or sheet ice, you can suspend it over the fire without using a container. It should be cut or broken into a doughnut shape and turned on the stick to ensure it melts evenly.

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Obtaining water from Ice and snow without a fuel source is not impossible. During the day the radiant energy of the sun will heat dark coloured rocks and melt the ice or snow in contact with them. I have found water in this way even when the air temperature has not risen above -10 degrees Centigrade. The best way to locate this melt water is to listen for the tell tale sound of flowing water, particularly on south facing slopes or cliff faces. When the water is located it can be channelled into a container. This source of water is unlikely to continue long after dark so you should take every opportunity to hydrate yourself and collect water during the day time. Water bottles should also be kept in your sleeping bag with you to prevent freezing. I often fill a water Bag with hot water and take this into my Sleeping Bag with me, absolute luxury! Sucking snow and ice to obtain water is really an option of last resort. The effect of consuming ice cold snow will reduce your core body temperature, and increase the risk of developing Hypothermia. Very cold ice can even cause burns to the lips and mouth. When venturing into a cold environment preparation and careful selection of equipment are vitally important. It is a good idea to seek the advice of a qualified Mountain Leader, or experienced explorer before undertaking such a venture. Reputable outdoor equipment suppliers are another good source of information. Even though the Glacial environment is one of the hardest places to travel, the rewards in terms of spectacular scenery and unique personal challenges make it all worth while. While reading about Survival Skills is a great way to build knowledge nothing beats learning from the experience of a professional Bushcraft Instructor. To book your place on one of our courses contact us today.

dryadbushcraft.co.uk - Obtaining Water from Snow and Ice - Dryad Bushcraft

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