Deciding which contaminant reduction claims to certify
LayneRT is an NSF/ANSI Standard 61 certified and approved arsenic removal media. It is a hydrous iron oxide-impregnated resin that efficiently binds arsenic and never needs backwashing. LayneRT was designed for use in the npXtra series of home treatment systems to effectively reduce arsenic. Tanks are connected by a proprietary control head that provides valves for sampling influent and effluent of both tanks.
Controlling VOC contamination with activated carbon
Arsenic and uranium in drinking water supplies