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PERFORMED BY INDEPENDENT LABORATORY
20,000 gallons of city water, spiked with high
levels of specific contaminants, was run through a KDF/GAC cartridge. The
efficiency shown below was measured AFTER 20,000 gallons had passed through the
cartridge (when new, removal is 99+%). Most other non-standard tests show
results after only one pass of contaminated water, which does not indicate how
the filter will perform towards the end of its life. To pass the NSF-53
protocol, the effluent must be under the EPA Maximum Contaminant Level (MCL)
throughout the test.
All concentrations are measured in milligrams per
liter (mg/l).
Test Results at 20,000 Gallons
|
Chemical |
Influent |
Effluent |
Efficiency |
EPA MCL |
|
THM (chloroform) |
0.57 |
0.029 |
95% |
0.1 |
|
Lead |
0.19 |
0.006 |
97% |
0.025 |
|
Fluoride (1) |
8.26 |
0.78 |
91% |
1.4 |
|
Nitrate (1) |
30.7 |
8.03 |
74% |
10.0 |
|
Barium |
10.4 |
0.56 |
95% |
1.0 |
|
Arsenic |
0.37 |
0.007 |
98% |
0.05 |
|
Cadmium |
0.03 |
0.004 |
87% |
0.01 |
|
Chromium VI |
0.15 |
0.011 |
93% |
0.05 |
|
Chromium III |
0.163 |
0.003 |
98% |
0.05 |
|
Selenium |
0.1 |
0.006 |
94% |
0.01 |
|
Mercury |
0.006 |
0.000* |
99+% |
0.002 |
|
Endrin |
0.0008 |
0.000* |
99%+ |
0.0002 |
|
Lindane |
0.011 |
0.0012 |
89% |
0.004 |
|
Methoxychlor |
0.32 |
0.0059 |
98% |
0.1 |
|
Toxaphene |
0.013 |
0.000* |
99%+ |
0.005 |
|
2,4-D |
0.3 |
0.02 |
93% |
0.1 |
|
Silvex (2,4,5-TP) |
0.029 |
0.004 |
86% |
0.01 |
* - Below detectable limit.
(1) - While this test shows a reduction in these contaminants, KDF
is inconsistent in their removal in certain water conditions. We
offer special nitrate and fluoride filters, or reverse osmosis, if
removal is needed.
A separate test was run on another KDF/GAC
cartridge to determine chlorine removal capacity. The challenge solution
contained 3 mg/l chlorine (most cities use less than 1 mg/l). 2 mg/l lead was
also added. At 20,000 gallons, both were being removed 99.9+%. The test was
terminated at 28,400 gallons when the chlorine removal rate hit 90%. The lead
removal was still 97.6%.
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