Tablets VS filter in India and Nepal
Replies: 13 - Last Post: May 3, 2012 4:35 AM Last Post By: Foggynad
May 1, 2012 11:01 PM
I don't want to drink bottled water this trip (My first trip I did, I was naive and didn't know what to expect) - I am set on not drinking bottled water and that's that.
I do have an MSR mini filter and I know this doesn't filter out viruses.
I am going to be in and around Delhi and Varanasi in India and (not too sure where in) Nepal and also Thailand (Chiang Mai and southern islands).
Should I buy iodine tablets, use them on the water first and THEN filter it with my MSR.. or should I just bring the tablets and forget about my filter? I will be mainly using tap water I think. I am leaning towards both.. tablets to kill bacteria and filter to get rid of bad taste. I know it would be a long process to do this for my daily drinking water but I do have a Platypus hydration system that I'll be bringing along to store my filtered water and then a smaller water bottle to put in my day pack. Just so I don't have to do this process every time I finish my bottle of water. Also, I have read that one shouldn't use iodine tablets for more than a couple weeks. I'll be gone for about 2 months. I'm just looking for some good advice from people who have had experiences with this in these areas. Thanks!
May 1, 2012 11:48 PM
1Crystallized iodine is the weakest option. Buy a bottle of Betadine solution instead. Not quite as good as Tincture of Iodine, but a little better as antiseptic.
Don't forget the setting time that also varies according to water temperature. But yes, doing both would be adequate. Correctly it would be filter then iodine. I had occasion to pass this procedure to the Centers for Disease Control some years ago, and they agreed it to be a suitable and safe solution.
Virii are very much less common outside of water sources near human habitation. Giardia and Cryptosporidium will be found in nearly every water source, deposited by animal waste material. Best to filter water that is not moving fast but not completely still - the bugs sink to the bottom, they're churned up by the current.
Or you could do even the better option which would be to buy bottled water, give the bottle to a ragpicker and then they can sell it to the recycler and be able to eat as well. You take away all of their plastic without an alternate source of income for them and they'll starve.
But of course you've thought of that.
May 1, 2012 11:53 PM
May 1, 2012 11:56 PM
May 2, 2012 3:18 AM
4Filtering , even with just a coffee filter , remove particles that the iodine ( or any chemical agent ) can bind to , and makes the process more effective. Removing the iodine taste ... that would mean that iodine is larger than the pore size , seriously doubt that. Iodine is sold as Betadine ( as alredy mentioned ) , Povidone or Lugols Solution.
The non-chemical solution is UV : insanely cheap and slow with the SODIS method ( possibly an option if you have a fixed base for a while ) , or fast & expensive with Steripen .
For the rest of the methods see here .
May 2, 2012 9:05 AM
Don't know if you've heard of the Lifesaver Bottle. It has a nano filter which will filter out "all bacteria, viruses, cysts, parasites, fungi and all other microbiological waterborne pathogens."
Only thing it won't filter out is things which dissolve in water such as salt, but I understand anything that is soluble wan't make you sick. A full travel pack costs roughly €200 but this will meet all your needs for 4000 litres of water. They have other cheaper options as well.
It's quiet an impressive system. Only draw back is that the bottle is about the size of a 1.5 litre bottle so a bit bulky but I reckon it is worth it and will be bringing a bottle with me, to cater for two people, on a year long round the world trip.
Hope this helps.
May 2, 2012 11:51 AM
May 2, 2012 12:08 PM
7O.k not best statement ever made, but carbon filters in the bottle referred to above should catch most pesticides and other such items. So without consuming an impractical amount, again I understand you won't get sick. Of course if you think something needs pointing out feel free as it's only what I understand.
The bottle I referred to above produces water above European and US drinking water standards using multiple sources of water, obvious exception being sea water, but river, ponds, taps and lakes all perfectly good sources to use with the bottle.
May 2, 2012 12:19 PM
8There are other simialr products available, drinksafe for example who offer a number of different bottles (smaller and cheaper).
May 2, 2012 12:34 PM
9The Lifesaver site talks of EPA approval/compliance , which is a shady proposition :
"EPA approved Caution: EPA does not approve or test filters
EPA registered Caution: EPA does not register filters based on their ability to remove Cryptosporidium"
See CDC Guide to Water Filters : http://www.cdc.gov/parasites/crypto/gen_info/filters.html
May 3, 2012 12:23 AM
May 3, 2012 4:21 AM
11@ Scoodly, I had a look at the drink safe system and it doesn't seem to filter out viruses, as they only refer to bacteria, parasites, sediments and chemicals. However, they do have alot of good reviews up on the site.
@ Vistet. The site talks about testing performed by some London School. The testing they performed was performed in compliance with EPA standards. This does not mean that the EPA approved the filter all that it shows is the EPA have standards and the filter was subjected to tests in order to meet those standards.
In relation to parasites and crypto speridium. The filter is meant to filter anything larger than 15 nanometers, which is far small smaller than the 1 micron filter recommended to remove crypto speridium. And from the lifesaver website they state that the smallest bacteria are about 200 nanometers and the smallest viruses are about 25 nanometers.
Again what I understand is viruses, bacteria, parasites etc. are not completely soluble and only travel along in the water. This means they get stopped by the filter.
From the research I did into the bottle I think I would have a far less chance of getting sick from using it than from relying on bottled water, which can be refilled and resold, or using chemicals or other filters.
Tests that they had done on the filter show it will remove 99.99% of Bacteria, Viruses, Cysts, Parasites and Fungi.
But of course everyone has to choose what they feel is best for them and others might think that other options suit them better.
May 3, 2012 4:32 AM
12@Foggynad I had a quick look at the site and it does state it deals with viruses:
"Drinksafe-systems purified water filter systems contain multi stages of water processing technology; These include patented ABSOLUTE filtration for the life of the filter, with Environmental Protection Agency purification media pre purification and chemical absorbing media inbuilt into every system; Combined these are proven to exclude threat from pathogens, protozoa, schistomas, spores and viruses that are the causes of disease and sickness from untreated water sources – often the result of human and animal interference. In 2010 integrated covalent bonding technology is built into each filter with biosafe media".
But I just flagged it up as another possibility and I won't work too hard at defending the product - it would look like spam if I did that.
I agree with your last sentence.
May 3, 2012 4:35 AM
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