Introduction: How to Purify Your Water

When you find yourself an a survival situation, you do not always have access to chemicals or a filter to purify the water so you can drink it.

You could just boil the water but this would n't get sand and other particles out of the water and the chemicals will also remain in the water after cooking it. Which in turn could affect your health.

So the best way to purify your water is to use a filter.
Often you can build a water filter with the resources you have available, this gets the particules, dirt and some of the chemicals out of the water.

It is wise to boil the water after you filtered it so that all bacteria and viruses are killed.

Step 1: The Filter

A water filter can be created by removing the bottom of a bottle. Turn the bottle upsidedown (with the cap down down).
and put the following materials in the bottle.
- pebbles
- Sand
- a piece of cloth or bandages
- charcoal
- a piece of cloth or bandages
- Sand
- pebbles

The cloth or bandages are used to ensure that all the different materials do not mix.
The pebbels and sand filter the particules and the dirt out of the water.
The charcoal gets a big portion of the chemicals out of the water, but it won't get it all out. (You can use charcoal from your campfire).
This filter will not remove any viruses and bacteria from the water so you have to boil the water after it is filtered.

Step 2: How to Use Your Filter

Gently scoop some water from a puddle or a pond with your cup, try to get as little dirt as possible into the cup. The more dirt comes along with the water the faster the filter becomes clogged and can no longer be used.

Pour the water from the pool or pond in top of your water filter, catch the water at the bottom of the filter in a clean cup.
it is best to throw away the first bit of water that comes out of your filter it often is cloudy and not that clean.

If the water that comes out of your filter is clear it is good and you can use it.

Boil the water at least 1 minute before drinking it, cooking will kill bacteria and viruses that are still present in your water.

If you put some spruce needles in the boiling water, you'll also have a tasty tea.

Comments

author
due+on+me made it!(author)2016-06-22

i like the morning

author
due+on+me made it!(author)2016-06-20

yea

author
due+on+me made it!(author)2016-06-17

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author
due+on+me made it!(author)2016-06-17

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author
daisy1997 made it!(author)2016-06-17

due on me is my friend

author
daisy1997 made it!(author)2016-06-17

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author
Jbybe made it!(author)2016-02-01

i agrre what amount

author
due+on+me made it!(author)2016-06-17

maby a little less

author
due+on+me made it!(author)2016-06-17

daisy1997 is my friend

author
daisy1997 made it!(author)2016-06-17

I am awesome

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author
due+on+me made it!(author)2016-06-17

then why are you barfing

author
due+on+me made it!(author)2016-06-17

but good

author
due+on+me made it!(author)2016-06-17

not as helpful as i wanted

author
daisy1997 made it!(author)2016-06-16

smell my barf

barf.png
author
due+on+me made it!(author)2016-06-17

hes being silly he always is

author
due+on+me made it!(author)2016-06-17

or is he a he

author
daisy1997 made it!(author)2016-06-16

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author
due+on+me made it!(author)2016-06-16

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author
daisy1997 made it!(author)2016-06-16

smell my barf

author
due+on+me made it!(author)2016-06-16

no

author
due+on+me made it!(author)2016-06-16

yea

author
due+on+me made it!(author)2016-06-16

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author
daisy1997 made it!(author)2016-06-16

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author
KimW103 made it!(author)2016-04-24

for salty water just boil it and find a way to capture the steam. like if you have a pot with a lid the moisture with condense on the lid and you can drip that off into a container and repeat until you have enough.

author
txadams made it!(author)2016-02-26

Good points and I might add some easily packed coffee filters can start the process of filtering out the particulates before the charcoal process.

author
cjanki13 made it!(author)2015-10-13

how much charcoal, sand, and pebbles are needed to make this????????

author
JosephineP4 made it!(author)2016-02-19

Maybe 1 or 2 inches is enough :)

author
RamG2 made it!(author)2015-05-14

i wish to know is there any natural filtering material like 'seeds' for this filtering method?? except clay or sand..

author
jhanger made it!(author)2015-10-12

Moringa Seeds ground up will actively clear the water of sediments and chemicals, you still have to boil and filter out the coagulated sediments from the bottom, but that may be what you would be looking for.

author
BloomWorld made it!(author)2015-07-07

Charcoal is carbon when it is treated with oxygen, it works as activated carbon. This process removes tiny pores of the charcoal which adsorbs the chemical impurities. It is basically used in the water purifiers to remove chemical impurities like chlorine.and other carbon based chemicals.When the water is passed through the activated carbon, it blocks the chemicals from moving further thus resulting in water free from carbon related chemicals.

author
KesateB made it!(author)2015-01-03

From my understanding and i have done not alot but a fair bit about filtration and purification processes research, have gone to talk to a few water filtration companies local in my country and here is their expertise advice. ( Please be advised to always ALWAYS do your own research into water purification and disinfection methods before testing what you might propose to do) Boiling water at a normal altitude will kill most viruses and bacteria, once it hits to a rolling boil ( you will notice that the water looks like it is rolling like a micro wave on the shoreline of the sea or lake) let it continue for at least a minute, anymore will evaporate the water ( Particularly if you are in a scarce water area such as when Bushcrafting or trekking, hiking etc , but will not remove chemicals and heavy metals residues and the such, still great if your only fears of the source water is pathogens and viruses, effective if you have background knowledge of the water source in question ( In higher or mountainous regions, a rolling boil will take longer as water boils at a different temperature depending on altitude). Activated carbon setups ( There are various designs based on a simple principle, to absorb/attract and/or energise is what i was told by one expert, the chemicals and residues towards the charcoal. Other mediums used in the processes are to aid turbidity, taste, sediment separation among others.

Hope it helps guys and gals!

Brown Hick

author
david.buschhorn made it!(author)2015-05-07

On Everest, water boils at the unimpressive temperature of 160°F.

Higher elevation brings lower boiling points. But you can both raise the temp and help sterilization by adding salt which really just gives you a vastly unsatisfying, salty, tepid cup of coffee. :-(

When you are already frozen and miserable and then you have to drink salty, lukewarm coffee...

author
elkliko made it!(author)2015-04-30

You can use a piece of cloth or a layer of grass to prevent the sand to fall out.

author
w0lv3s+r+awsum+ made it!(author)2015-04-29

How do you use this without the sand falling out?

author
anil2705 made it!(author)2015-03-28

how do we know the life of coal?

When shall we replace it?

author
Goldstar212 made it!(author)2015-04-28

About every month. Best way to make sure you don't get sick.

author
Goldstar212 made it!(author)2015-04-28

Hum..........................

author
MeganE1 made it!(author)2015-03-20

Thanks for these instructions! There are tons of different ways to purify water. One of the most common is just to boil it. Boiling isn't always possible, though. I really like the idea of making a purifier out of a water bottle. I'm totally going to give this a try.

http://www.thewaterbus.com/

author
kz440 made it!(author)2012-07-06

I am curious about the flavor of the filtered water. I recently moved into a house that has terrible tasting water. I do NOT want to pay the high price of water service, not even my dogs care for the water. The water is safe enough but has a high calcium content and tastes salty. I can't even handle coffee made from it. Any clues as to the flavor change?

author
turtle.trovillo made it!(author)2015-01-22

Charcoal filters remove chlorine which accounts for a lot of the bad taste. It will not remove salts though. Minerals pass right through the filter. But the chlorine in your water bonds to the carbon in the charcoal so that taste and odor is removed.

author
elkliko made it!(author)2012-07-08

I can't say alot about the flavor of the water because the water i use isn't that bad i only have to remove the dirt, bacteria en chemicals that are in the water, I do not think that it wil get the salt out of sea water for instants. but you can always try it because the ilter is very easy and cheap to make.

In your case it can help to vaporize your water and than condence it again.
When you boil salt water the salt in the water won't evaporate and you can get rid of the salty tast, but as you can imagine this is a intensive way of cleaning your water and i don't know if it wil get rid of calcium.

author
kz440 made it!(author)2012-07-08

...actually, it's not salt water... it has a slightly salty taste though. I am going to try the filter, but perhaps on a larger scale as I have to have water for my spoiled dogs, but hey- they don't like this water either.

Thanks for your reply, much appreciated.

T

author
ercela31 made it!(author)2015-01-15

I was wondering if you acn use any sand and if you can buy active charcoal?

author
Jared101 made it!(author)2015-01-09

Very helpful

author
Croocket made it!(author)2014-10-17

Hi! Thanks for a great instructable. I have a question about the longevity of the filter; how much water could you filter before having to change the charcoal? I'm guessing it gets less effective after a while?

author
Momo5556 made it!(author)2014-09-08

if you can I need it quick thanks!

author
elkliko made it!(author)2014-09-10

you asked how this works well in the simple way:
the chemicals bind with the charcoal and with that they are filtered out of the water and get stuck in your filter.

author
amethena made it!(author)2013-11-02

dose any one no what chemicals it takes out

author
Momo5556 made it!(author)2014-09-08

no sorry

author
Momo5556 made it!(author)2014-09-08

how dose that work? I'm doing a protect and would like to know thanks!

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