Our ProCare-LP® pure silver and silver copper ionization systems are sold around the world when specifically dealing with water treatment protocols for the prevention and control of microorganisms like: E. Coli, Pseumodas Legionella, Staph (Staphylococcus), Listeria, Salmonella and many other infectious bacteria.

Silver ions (ionic silver) has bactericide properties and are regularly used as a drinking-water disinfectant and impregnated in some filters and materials used at the point of use to prevent microbial growth or outbreak. Silver is used with copper in some of our water treatment systems to control Legionella in domestic hot water systems, potable water and cooling towers.

The silver levels in drinking water treated for disinfection require an average of 0.05ppm.

The only obvious sign of silver overload to humans is Argyria, a condition in which skin and hair are heavily discoloured by silver in the tissues. Argyria estimation in humans for a total lifetime, based on human case reports and long-term animal experiments has been determined at a total accumulation of 10 g of silver . Daily intake is estimated at about 0.07ppm per person/day with a small absorption rate set at between 0% to 10%.

The low levels of silver in drinking water are not relevant to human health with respect to Argyria. Higher levels of silver in potable water, up to 0.1ppm, can easily be tolerated without risk to health. It is estimated that this level of concentration gives a total dose over 70 years of half the human NOAEL of 10 g.

Current European Union potable water standards for human consumption are set at a maximum value of 0.01ppm with an exception clause specific to water ionization for Legionella control. EPA regulations stipulate that the acceptable maximum level of Ag in potable water is set at 0.1ppm.