Thanks for the additional information.
I spoke with representatives from two leading water filtration product
testing labs in the country -- NSF (formerly National Sanitation
Foundation; now just "NSF") and Water Quality International (WQA).
WQA specifically recommends activated charcoal for POE removal of
chlorine and anion filtration (or "ion exchange") for POE removal of
nitrates and fluoride. Reverse osmosis does indeed work for nitrates
and fluoride, but POE reverse osmosis is not doable with metal piping,
as the water becomes "too clean" and can dissolve it, causing leakage
into your supply. Reverse Osmosis is only possible with plastic
piping, which isn't as common as metal.
According to WQA, percholate isn't yet an EPA-certified contaminant
(as far as drinking water is concerned) and it appears most filtering
of this substance is done in nonresidential capacities. According to
the following EPA web page, anion exchange systems may be effective in
technology is used in the products I reference below.
Both testing labs use the standards created by NSF, which are
accredited by the American National Standards Institute (ANSI). The
"best" water filtration products on the market are going to be those
that are certified by one of these quality-governing bodies.
Certified devices are ones authenticated to meet the necessary
operational standard requirements to effectively filter water. There
doesn not exist a certified POE system that filters nitrates or
fluoride. However, I have found a company that makes a POE system
containing all NSF-certified parts -- including the tanks, housing,
and microprocessor controller. I would deem this package the best
option for your situation.
Crystal Quest is the manufacturer of the system, which comes with 5-10
(part-specific) year warranty. They count US embassies and government
agencies among their client base. I spoke with a representative named
Mike who confirmed the WS/WF/N 1.5 (750k gallons) or 2.0 (1 million
gallons) package will do just what you need. It comes with three
10x54 tanks with microprocessor controlled KDF/carbon ion exchange
systems. Depending on options, the whole package prices between
$3000-$4000, and is certified to reduce chlorine 95%+, bringing
fluoride to within .5 ppm and nitrates to within .5 ppm. When
calling, ask for Mike, and reference the "Google Answers" request
Should you have any additional questions, feel free to ask. Thank you!
(1) NSF-certified products
(2) Oak Ridge National Laboratory, part of the US's Department of Energy,
has developed the BiQuat resin for Perchlorate reduction in water, which is
5x better than other resins on the market according to this article:
Purolite sells the resin, but there doesn't appear to be a POE system for
it yet. See http://purolite.biz/POU_POE_Perchlorate_Removal.pdf
(3) For $200, you can order a highly scientific breakdown of NSF's standards.
Contact Tom Gloden at 734-913-5785 for more information.
contacted relevant organizations and associated websites
Request for Answer Clarification by
01 Feb 2006 18:48 PST
Thank you for the clear layout and all of the information you have
provided in your response. Sorry not to request clarification sooner,
I've been away from home until recently.
It sounds like the system you reccomended is quite bulky, which would
be okay if it were under $1200, meaning, if I could split the cost
with my landlord and leave it here. However, for $3000-$4000 I would
need a smaller system to be able to move with me to my next home. For
that reason, I am not satisfied with the outcome of your research,
even though you have indeed been thorough.
I am looking for a residential POE system that is either under $1200
(to leave behind at this house, with no limit on size), or that is
small enough and easy to install/unistall (for moving purposes) at any
price. Finding the best quality system at a reasonal price would be my
preference. Could you please find me a POE system that meets those
Clarification of Answer by
02 Feb 2006 11:22 PST
The same company makes a model called the "Triple 20" Whole House"
which will be a little over $400 shipped, and made with all certified
parts. You'll want to make sure to order it with the nitrate
cartridge. A picture of it, as well as additional information on it,
is at this link:
This should be significantly less bulky. The chief difference between
this and the other product is the middle tank's size and total weight
when filled with water (225 pounds less), how long the filters last,
and its Fluoride filtering capability (due to reduced contact with the
water), which is not relevant, since Fluoride is not your chief
concern (nitrates are).