The Premium 10 Stage Filter removes or greatly reduces the following:
Chlorine, cancer causing organic/chlorine compounds called trihalomethanes (THM), bad odors, e.g., hydrogen sulfide which gives water a rotten egg smell, pesticides, herbicides, PCB's, toxic heavy metals i.e., lead, cadmium, organic arsenic, asbestos, micro-organisms (protozoa and cysts) such as cryptosporidium and giardia, and dozens of other lesser known organic contaminants.
Each filter cartridge should be changed after 1500 gallons or a maximum of 18 months. This would be approximately one year for a family of four, assuming they each drank: 1/2 gallon a day and the family washes fruits and vegetables in filtered water. After replacing the filter run water through the unit for 2-3 minutes.
Note: It is increasingly important to use filtered water for a variety of kitchen needs besides drinking water. For example, more and more imported fruits and vegetables have been found to have giardia or cryptosporidium on them plus these hard shelled cysts can be present in your water supply. Filtered water is recommended for rice and pasta since boiling does not remove chlorine from water.
The 10 Stage Premium Filter has been extensively tested by Truesdail Laboratories, Inc. an EPA approved Lab which is certified to do filter testing and tests to the same EPA protocols as NSF.