Discussion:
APPLICATION: Katadyn Micropur MP1 Purification Tablets
SF Nazdarovye
2004-05-18 01:04:29 UTC
Permalink
Well, I hope not to max out my testing limit with such a small item
(and one that I already use, to boot!), but given Shane's plea for
further applications, I'll take a hit for the team :)

Here, then, goes my:

Application to Test the Katadyn Micropur MP1 Purification Tablets
May 17, 2004
Steve Nelson

*Reviewer's Information

Name: Steve Nelson
Age: 43
Gender: Male
Height: 5' 9" (1.75 m)
Weight: 158 lb (72 kg)
Torso size: 20.5" (52 cm) per ULA instructions
Hip measurement: 35" (89 cm) per ULA instructions
Email address: nazdarovye at y..oo dot com
City, State, Country: San Francisco, CA, U.S.A.

Backpacking Background:

As an interface design and usability consultant by trade, I'm always
excited by analyzing and improving designs and processes; backpacking
provides a fertile and fun arena for that. I have been backpacking
since I was a kid growing up in upstate New York: we backpacked and
canoe-camped in all seasons, throughout the Adirondacks and nearby
areas, ranging as far as La Verendrye Wildlife Reserve, Quebec. As an
adult, I've backpacked and hiked extensively in California, but also
have taken trips throughout the West, from New Mexico to British
Columbia, and return often to the Adirondacks.

Backpacking Style:

In the last year I began educating myself about lightweight and
ultralight backpacking, and have been applying more and more of this
philosophy to my outdoor jaunts and gear upgrades. I like moving fast,
and lightening the load facilitates that. I also enjoy urban strolls,
cross-country skiing, snowshoeing, kayaking, and aviation in addition
to hiking and backpacking, so my gear gets exposed to a wide variety of
uses and conditions.

*Testing Background

I've actually been a long-time user of chlorine dioxide tablets, having
first found them overseas and quickly deciding that I prefer them to
iodine, as well as to chlorine dioxide products that require mixing and
waiting. Until Katadyn started selling the Micropur MP1 Tablets (which
I currently use), I had a difficult time obtaining replacements for my
survival kits and backpacking needs, so I was excited when they became
available.

I currently carry Micropur MP1 Purification Tablets on all of my trips
- they're always there as a backup in case my filter fails (on trips
where I bring one), and on many trips I've relied on them as my main
water disinfection method. Since I've switched over the past year to a
lighter and lighter backpacking style, the tablets have become even
more appealing to me.

*Test Locations and Trip Types

I live in California but have a business and family schedule that also
brings me to the east coast often. Trips planned during the test period
for the Micropur MP1 Tablets include:

- Confirmed weekend backpacking trips in the Mendocino National Forest,
Pt. Reyes National Seashore, Santa Cruz mountains, and Ventana
Wilderness
- Confirmed extended trip on the High Sierra Trail
- Proposed weekend backpacking trips in the Adirondacks and the Sangre
de Cristo range in Southern Colorado, and a possible summit attempt or
two at Mt. Shasta and another California 14-er
- Proposed extended trips on the Wonderland Trail and the PCT from
Sonora Pass to Kennedy Meadows

Given that the testing period for this particular item is shorter than
normal, it sounds like there won't be a chance for winter testing, so
I'll just note that in the winter I like to melt but not boil water,
and add Micropur tablets to kill off bad stuff rather than wasting fuel
on boiling when it's not necessary.

Altitudes on these trips will range from sea level to over 10,000 ft
(3,050 m). Weather will range from hot and dry California summer
conditions to afternoon Sierra thunderstorms to wet and soggy east
coast hiking and paddling. Temperatures will likely range from below
freezing to as high as 100° F (38° C). Most of the hikes will be in
areas with a combination of running and still water.

*Test Plan

I'll test the Micropur MP1 Purification Tablets initially at home,
noting how quickly they dissolve in a couple of different water
temperatures, and how they affect the taste of water. I'll also review
the packaging, instructions, web site, and ease of use of the tablets
(noting that I've already discovered that the foil packaging for the
individual tablets is devilishly difficult to open without a knife or
scissors.)

I'll then bring the tablets on trips, using them as my primary
disinfection method on many trips, and as a backup on the few trips
where I know water will likely be murky or tannic and be better served
by mechanical filtering.

Issues I'll be observing include:

- Ease of use (including respecting the warnings regarding skin contact)
- Convenience
- Taste
- Effectiveness (do I get sick?)

For each use of the tablets I'll record water sources, water quantity
and quality (e.g., silty or clear), number of tablets used, ambient
temperature, and dwell time. Wherever possible, I'll also record water
temperature. I also will prefilter any water that seems dirty or murky,
using either a coffee filter, a silk screen, or a bandana. (Though it
would be interesting to see whether such prefiltering alters the
effectiveness of the tablets, I'm not sure how to do this; if I come up
with a sound method, I will add that evaluation to my test plan.)

*List of Tests to Date

Owner Reviews:

Dancing Light Gear Ultralight Brawny Tarptent ("Bonus" report
responding to call for shelter reviews)
http://tinyurl.com/2w4sj
Arc'teryx Bora 65 Backpack
Arc'teryx Q5 Waist Pack
T.R.U.E. Multitool

Current Tests in Progress:

Kahtoola Traction System
http://tinyurl.com/yrdzz
Therm-a-Rest Prolite 3 Pad
Integral Designs Down Mitts
Integral Designs Hot Socks

Completed Tests:

Brasslite Turbo I Stove
Princeton Tec Scout

My full list of tests and links is at:

http://www.backpackgeartest.org/tester_reviews/nazdarovye

I am currently the monitor for two tests: the SealSkinz ChillBlocker
Gloves and Socks. I am also a BGT mentor.

*Agreements

I have read the latest version of the Survival Guide (v. 1202), and
agree to fully comply with its requirements. Shane has confirmed that
he has received and filed my signed tester's agreement.

Thank you for considering me for this test.

- Steve Nelson


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Roger Caffin
2004-05-18 04:06:27 UTC
Permalink
I have a question for the group that Steve's excellent application
raises. I too use the MP1 tabs, but in winter I do not treat melted
water, nor do I boil it. I do select my snow carefully (no discolored
snow of any kind, which can indicate algae or nastier contaminants --
a Frank Zappa song comes to mind).
I just melt it with a half-inch of water added and drink away. So far,
I've never become sick, and (so far as I know) none of the real
nasties live in clean snow. Is there any consensus on snow-melting
practice? How many folks boil or otherwise purify? Am I playing
Russian roulette with my tummy? All opinions appreciated.
The snow is usually gathered in spots unfrequented by other campers,
it should be stressed.
First define the threat.
In most cases it would be E coli (bacteria), Giardia lamblia (protozoa) and
Cryptosporidium sp (protozoa), with the first two being the major ones.
Below towns one may run into the outflow from sewerage treatment plants, and
these can harbour very serious viral loads. Downstream from agricultural
areas, especially some orchards, there may be agricultural chemicals in the
water, including quite nasty pesticides etc.

Most of these will simply not exist in clean fallen snow. E coli may be
there if you are not careful about the colour of the snow... Giardia may be
there from foxes and some other animals which can pick up the cysts from
human excretia and recycle it around, but again the snow should be coloured.
The (pink) coloured algae you sometimes see on snow is not harmful as far as
I know.

Fresh clean snow is the result of a form of distillation, and the only
contaminants it could pick up in the sky would be very dilute. Granted, the
snow in the Arctic region does have an elevated level of mercury, dioxin and
PCBs, but this is not normally harmful until highly concentrated in the fats
of polar animals and fishes.

In short, fresh clean snow in the mountains is usually as clean as you can
get. Melt away! But do watch out for creeks in popular areas: they may have
significant Giardia loads.

Cheers
Roger Caffin





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SF Nazdarovye
2004-05-18 09:24:01 UTC
Permalink
When the snow has first fallen, this is all reasonable to assume.
However, once it's been around for a bit, or once you dig below
fresh-fallen powder, you're into snow that's possibly contaminated (or,
as Cora notes, in some places almost assuredly contaminated!)

I admit I'm toward the far end of the caution scale, but after having
my weight drop to 138 (I'm 5'9") after two weeks of gastrointestinal
nastiness caused by a waterborne pathogen years ago, I'll likely remain
cautious.
Post by Roger Caffin
Most of these will simply not exist in clean fallen snow. E coli may be
there if you are not careful about the colour of the snow... Giardia may be
there from foxes and some other animals which can pick up the cysts from
human excretia and recycle it around, but again the snow should be coloured.
The (pink) coloured algae you sometimes see on snow is not harmful as far as
I know.
Fresh clean snow is the result of a form of distillation, and the only
contaminants it could pick up in the sky would be very dilute.
Granted, the
snow in the Arctic region does have an elevated level of mercury, dioxin and
PCBs, but this is not normally harmful until highly concentrated in the fats
of polar animals and fishes.
In short, fresh clean snow in the mountains is usually as clean as you can
get. Melt away!
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Roger Caffin
2004-05-18 10:23:50 UTC
Permalink
Post by SF Nazdarovye
When the snow has first fallen, this is all reasonable to assume.
However, once it's been around for a bit, or once you dig below
fresh-fallen powder, you're into snow that's possibly contaminated (or,
as Cora notes, in some places almost assuredly contaminated!)
No argument!
We tend to avoid the popular areas, and some areas are obviously more at
risk than others. Halfway up the underside of a small snow cornice is
usually fairly safe, but nothing beats paranoia.
Post by SF Nazdarovye
I admit I'm toward the far end of the caution scale, but after having
my weight drop to 138 (I'm 5'9") after two weeks of gastrointestinal
nastiness caused by a waterborne pathogen years ago, I'll likely remain
cautious
Funny about that :-)

Cheers
Roger Caffin




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