20,000 gallons of city water, spiked with high levels of specific contaminants, was run through a KDF/GAC cartidge. 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).

* - 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%.

Notice: consumer is responsible for following any state and/or local regulations and plumbing codes pertinent to the purchase, installation and operation of our products.
California Residents: the state of California requires water treatment devices claiming health claims be tested and certified by them - our units are not. Therefore, only aesthetic claims can be made on units shipping to California addresses.