The EPA requires that any water treatment device that uses a pesticide, such as silver , be registered as some of the silver will be present in the output water. The manufacturer must show proof that the amount of silver released does not exceed established environmental guidelines. Extreme caution must be used in the selection of any stand alone carbon device whether it uses silver or not. Some employ chemicals such as iodine and chlorine but most are purely mechanical. Purifiers are devices that use a combination of filtration technologies to produce proven high quality drinking water.
Filters are generally non tested devices simply designed to work with only one or two contaminants.
By using a purifier vice a filter you will benefit from the known reduction of chemical contaminants, chlorine, particulates, tastes and odors etc. True purifiers will always supply the specific test reports which back up their removal efficiency claims. We will discuss some of the other common purification technologies next. This technology is borrowed from nature. It occurs naturally when plants absorb water from the ground through their cell walls.