are just a few well known methods. I am NOT an expert on this topic.
Entire books and websites could be devoted to this one topic. The
purpose of this article is simply to give people a very quick overview
of what options are available to make questionable water drinkable. I
encourage people to click on the links I have provided to read more in
depth about this topic because it is incredibly crucial. Now is the
time to educate yourself, your family and your loved ones on this
vitally important topic.
1.) SteriPEN www.steripen.com
The SteriPEN uses ultraviolet light to destroy viruses, bacteria, and
protozoa. The SteriPEN can purify 16 oz. of questionable water in 48
seconds. According to their website, "SteriPEN utilizes C wavelengths
UV (ultraviolet light). UV-C light is a short wave light, between
x-rays and visible light wave lengths, which destroy the DNA of
microbes in seconds".
Advantages to SteriPEN:
a.) lightweight
b.) compact
c.) you can use a container made of glass, ceramic, metal and nearly
any plastic with a SteriPEN
Disadvantages to SteriPEN:
a.) requires batteries
b.) does not filter out debris
c.) depending on your budget this can be expensive - the price range
seems to be between $60 - $100 or so
d.) will not decontaminate threads in your screw top water bottle
e.) you can only use clear water with a SteriPEN because cloudy water
inhibits its effectiveness
2.) Boiling Water www.epa.gov/safewater/faq/
Boiling water kills most types of disease causing organisms. Boil
water for one minute, let cool, and then drink. At altitudes above 1
mile, boil water for 3 minutes. Some websites suggest boiling water
for up to 10 minutes. Again, now is the time to start doing research
on this topic so you can decide for yourself how long you think it is
necessary to boil water to make it safe.
Advantages to boiling water:
a.) no special equipment or skills needed
b.) currently relatively inexpensive (so long as fuel is inexpensive
and plentiful)
Disadvantages to boiling water:
a.) water must be filtered first if filled with debris
b.) water may have flat taste after boiling (if it's a TEOTWAWKI
scenario then who cares)
c.) requires fuel (wood, propane, electricity, etc.)
d.) boiling water may give away your location especially if you are
doing it outside with a wood fire
e.) you may lose precious water during boiling process because of evaporation
f.) may be time consuming (especially if you need to build a fire)
3.) Potable Aqua Iodine Tablets www.potableaqua.com/faq.shtml
Iodine tablets kill bacteria, viruses, and giardia. Iodine tablets
work by "penetrating the cell wall of the microorganism, therefore
rendering it inactive".
Advantages to iodine tablets:
a.) relatively cheap (approximately $6.50 for 50 tablets). Two tablets
treat 1 quart of water.
b.) lightweight
c.) portable
d.) can be used to treat cloudy water, low temperature water, and
water with extreme PH
Disadvantages to iodine tablets:
a.) must wait at least 30 minutes before drinking
b.) not effective against Cryptosporidium or chemical contaminants
c.) should not be used on a long term basis (6 weeks is the limit)
d.) opened bottles of tablets go bad after one year
e.) tablets may add strange taste to water
f.) must filter water to remove debris
e.) women who are pregnant or people who have thyroid problems should
consult a doctor before using iodine tablets (this may be impossible
in a TEOTWAWKI situation)
4.) Chlorine www.epa.gov/safewater/faq/
Use non-scented household chlorine bleach to treat water. Chlorine
kills microorganisms. (I was unable to find out exactly what chlorine
does/does not kill and it how kills it. If anybody knows, please
post.) Click on above EPA link to view the chart regarding how much
chlorine to use to treat water. Mix water treated with chlorine,
cover, and let stand for 30 minutes before drinking.
Advantages to using chlorine:
a.) relatively cheap
b.) fairly easy
Disadvantages to using chlorine:
a.) water may taste strange
b.) must filter out debris
5.) When there is nothing to treat water, but water is still available
then try to gather fast moving water rather than stagnant water. Stay
away from water that has floating debris, an odor, or a dark color.
WARNING: Do this only in a TEOTWAWKI situation. Even clear water
with no debris can be contaminated with nasty stuff.
Like I previously stated, I am NOT an expert on this topic. If anyone
has anything to add to this post (i.e. corrections, clarifications,
personal experiences, etc.) then post away! Today is the day to talk
about this topic before TSHTF.
P.S. Once my Go Berkey Water Filter arrives then I'll do a review of
that. Can't wait! :)
Sincerely, Samantha In The Trailer Park
17 comments:
Good Post:
Another way that I am aware of right now is sun/heat kill.
Use clear 2-liter soda jugs. Fill 7/8 with questionable water. Place on roof in direct sunlight on a warmish day. Preferably on a black background.
after 24 hours, the combination of UV rays from the sun and the residual heat will kill the nasty critters.
http://www.cnea.gov.ar/xxi/ambiental/agua-pura/eng/tecnologias.asp
Good list. I like the pros and cons of each.
Another good thing to do with dirty water is pre-filter it.
Run it through a cloth or coffee filter or anything else you have on hand.
This will save wear and tear on your filtration system, or keep you from having a pot full of little debris after boiling.
It looks like this list is for portable solutions. I'd include the Katadyn Hiker filters in the list. They have a pre-filter to help strain out the big stuff, and are very compact. I've used mine on fishing trips very successfully.
For more stationary solutions, you've got to include Berkey filters.
http://www.berkeyfilters.com/waterfiltercomparison.htm
They are absolutely incredible. They even remove VOCs and all kinds of chemicals.
Sucks to be here in California, as they are now outlawed. Thankfully, I bought a bunch of replacement Black Berkey filters before TPTB enacted the prohibition.
It is unlikely that the fire in a Dakota Fire Pit will be seen. Dig two 6"x12" holes connected at bottom. Build fire in one. Air supply comes through the other. When you break camp fill both holes.
Sodium hypochlorite (bleach) is a strong base. It acts on the cellular membranes by taking hydrogen ions away from material it contacts and breaking the chemical bonds. Typically, this kills any bacteria it comes in contact with.
To paraphrase my HS chem teacher: Take an acid and rub a drop between your fingers and you will immediately feel it burn when the acid attacks the skin. Take a drop of a base (like chlorine bleach) and rub it between your fingers and it feels slippery, but soon it begins to feel lumpy... that's your skin coming off.
Also, from http://stason.org/TULARC/sports/survival-water-treatment/12-Water-Purification-Chemical-Treatment-Chlorine.html
This little synopsis seems accurate from back when I took a water chemistry class back in the college days...
"Chlorine is sensitive to both the pH and temperature of the treated
water, Temperature slows the reaction for any chemical treatment, but chlorine treatment is particularly susceptible to variations in the pH as at lower pHs, hypochlorous acid is formed, while at higher pHs, it will tend to dissociate into hydrogen and chlorite ions, which are less effective as a disinfectant. As a result, chlorine effectiveness drops off when the pH is greater than 8.
Chlorine, like iodine, will not kill Cryptosporidia."
Bleach disrupts cell membranes. Think of it like curing with salt only it completely disrupts the proteins and fats imbedded in the membrane causing the cell to die where salt would cause cells to shrink through osmosis. The good thing about bleach is that proteins (tuburculosis, prions) can be disinfected with a bleach solution as well and it kills clostridium. Still have to wait 30 minutes to drink.
Sorry, one other thing that is nice about bleach. If you disinfect and then allow a container to sit open on the counter, the bleach will off-gas. After a few hours to a day, all of the chlorine smell and taste will be gone. It also allows you to use a stronger soltion if you have the time to wait for the chlorine to bleed out.
Wow! I can't believe so many people responded to this post. I put a lot of time and research into writing the post so "thank you!" to everyone who responded.
Degringolade - Thanks for the link. I'll check it out.
Lucas - I agree. Pre-filter whenever possible.
Chief Instructor - I did a post on the Berkey Filter a few days ago. IMHO, they are the best of the best. Berkey Filters are against the law in California? OMG. What's next to be outlawed in that state? What is the TPTB?
Vlad - Awesome tip. Thanks! :)
Dean in AZ and Chadow10 - Thanks for the explanations on bleach/chlorine. There's so much more for me to learn.
Sam in the trailer park
This is an affordable, portable, quick filter my husband came up with which we used for over ten years in the Amazon.
http://jungle-hut.blogspot.com/2008/05/make-your-own-portable-water-filtration.html
Sam, yeah, some law was passed that was intended to keep lead out of our water supply. Sounds like a good idea on the surface.
BUT... any device that touches drinking water now has to be CERTIFIED to not contain any lead. Big bucks must be spent every year to keep the cert up.
The Black Berkey has no lead in it. In fact, it has NO METAL in it, but since it touches water, it must be certified. Ironically, IT REMOVES LEAD FROM THE WATER!
Berkey essentially told California to shove it. I don't blame them at all.
I wrote a short paper on disinfecting water a few years ago:
http://www.scribd.com/doc/26369449/Sterilizing-Water-Rev1
According to this information posted on Survival Topics.com:
http://www.survivaltopics.com/survival/how-long-do-you-need-to-boil-water/
Correct Water Boiling Time
whole forests have been cut down for firewood in order to boil drinking water. The correct amount of time to boil water is 0 minutes. Thats right, zero minutes.
"According to the Wilderness Medical Society, water temperatures above 160° F (70° C) kill all pathogens within 30 minutes and above 185° F (85° C) within a few minutes. So in the time it takes for the water to reach the boiling point (212° F or 100° C) from 160° F (70° C), all pathogens will be killed, even at high altitude."
Source: http://www.princeton.edu/~oa/manual/water.shtml
"What is not well known is that contaminated water can be pasteurized at temperatures well below boiling, as can milk, which is commonly pasteurized at 71°C (160°F)...".
Source: http://solarcooking.wikia.com/wiki/Water_pasteurization.
What is not well known is that contaminated water can be pasteurized at temperatures well below boilingThe fact is, with a water temperature of 160 to 165 degrees F (74 C) it takes just half an hour for all disease causing organisms to be inactivated. At 185 degrees this is cut to just a few minutes. By the time water hits its boiling point of 212 F (100 C) - plus or minus depending upon pressure or altitude - the water is safe. Even at high altitudes the time it takes for the water to reach a rolling boil and then cool means you can safely drink it.
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Hi,
The site is about water drinkable, It is clear that people in the developing world need to have access to good quality water in sufficient quantity, water purification technology and availability and distribution systems for water. Thanks a lot.
Your article is really helpful to know how to make questionable water drinkable. I like your post.
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