Is A Reverse Osmosis
Water Dispenser The Answer To Home Water
Are you sure that you want a reverse osmosis water
dispenser? Some reverse osmosis water filtering systems
are very good. Others do not include enough steps to
truly protect your health.
The Environmental Protection Agency recommends a reverse osmosis
water dispenser as one option for people
with weakened or non-functioning immune systems, along with
other options, to remove parasitic cysts from publicly treated
tap-water. Cryptosporidium and giardia cysts may cause
illness similar to food poisoning in the average person, but in
someone with immune deficiencies, they can cause death.
That’s why the EPA recommends that some people should use
additional protection. They also want to remind you that
exposure to parasitic cysts can occur when you are brushing
your teeth or washing fruits and vegetables.
All of this is true. My only problem with reverse
osmosis water filtering systems is that they do not remove
other harmful contaminants. Those might not kill you
today, but they could kill you later down the road.
For example, chlorination kills bacteria, but creates a
byproduct called trihalomethane or THM, for short. We now
know for a fact that THM exposure causes cancer. At one
time, that was a subject up for debate, but not anymore.
A reverse osmosis water dispenser will not remove
THMs. They can only be removed through a process called
“adsorption” (not absorption as with a sponge). A
purifier that contains an adsorption step traps THMs and other
chemicals on the surface of a block composed of carbon and
If the block is properly designed, it will also remove
parasitic cysts. The design must be a sub-micron
structure, so that the cysts cannot pass through. This is
another option suggested by the EPA.
Some newer reverse osmosis water filtering
systems contain an additional carbon
filtration step to remove some of the chemicals that would
normally pass through the porous membranes. So, the
addition of the carbon filter is good, but why do we need or
want the RO step? There is really no reason for it.
A reverse osmosis water dispenser is no better than a
multi-stage filtration device that costs about a third of the
price. In one way, the less expensive technology is
Naturally waters have a trace mineral content that is good
for your health. Research has shown that drinking
de-mineralized waters causes digestive problems, can lead to
electrolyte imbalances and nutritional deficiencies.
De-mineralized is what you get from distillation and reverse
osmosis water filtering systems. The newer multi-stage
purifiers use a process called ion exchange to turn copper and
lead ions, which are always present, into potassium and
So, instead of de-mineralized, you have something to drink
that is safe and pure, tastes
good and is good for your health. If you have ever drunk
from a reverse osmosis water dispenser, you have noticed that
the taste is stale and unpleasant. That’s just a matter
of taste, of course, but you can have something better for
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