Chromium(VI) may pass through activated carbon filters

Because activated carbon is one of the most common types of filtration available in the home, it would be a convenient solution if the use of standard activated carbon filters captured the chromium(VI) that may be in tap water.  However, at least one patent on metal removal suggests that the activated carbon may not be an ideal media for the removal of chromium(VI).  United States Patent No. 7,803,737 teaches that activated carbon filtration “it is not efficient for certain metals, particularly uranium, hexavalent chromium, and arsenic.”  If the most common general purpose home filtration systems are unable to handle chromium(VI) then solving problems with contaminated tap water may end up being an expensive proposition.