How Does the MadiDrop+ Work?

The MadiDrop+ leverages the powerful antimicrobial properties of silver, an effective biocide for a range of waterborne pathogens.

MadiDrop+ uses a proprietary approach to deposit very small “patches” of silver on the internal surfaces of a porous ceramic tablet. Once in water, the MadiDrop+ tablet continually releases low levels of silver ions.

Silver ions disinfect many different pathogenic waterborne bacteria, including Escherichia coli, Vibrio cholera, Salmonella, and Shigella. Additionally, viruses such as poliovirus and norovirus, as well as the protozoa Cryptosporidium parvum and Giardia lamblia, are susceptible to inactivation by silver.


Unlike other metals such as lead and mercury, silver is not toxic to humans. It is not known to cause cancer, reproductive or neurological damage, or other chronic adverse effects. Both the World Health Organization (WHO) and the United States Environmental Protection Agency (USEPA) recommend a maximum concentration of 0.1 mg/L for silver in drinking water supplies. The MadiDrop+ produces ionic silver levels sufficient to disinfect or inactivate waterborne pathogens while remaining considerably below the daily maximum recommended concentration.