Several processes have been developed for removal of arsenic from our drinking water.
Arsenic is a naturally occurring element present in ground waters in many parts of the world. Natural mineral deposits, agriculture and industrial pollution all are factors that contribute to the presence of arsenic in water. It has been well established that arsenic is toxic at high concentrations; however, recent research has shown that relatively low concentrations can cause adverse health effects, including cardiovascular problems, diabetes and various forms of cancer. For more than 50 years, the EPA-mandated maximum contaminant level (MCL) for arsenic in drinking water has been 50 parts per billion (ppb). However, as of January 2006, the acceptable level will be reduced to 10 ppb; it has been estimated more than 5 percent of all U.S. water supplies will be out of compliance.