Installing a reverse osmosis, ultrafiltration, distillation or ion exchange system is the most effective method to remove arsenic from well water. Typically these types of systems treat only one faucet in a house. Boiling water or chemically disinfecting it with a treatment, such as chlorine, does not remove arsenic.
Private well water users are advised by the U.S. Centers for Disease Control to contact their local health department to find the best arsenic removal procedures for their area. Arsenic is a naturally occurring element, but it can also be introduced into the water table from many industrial sources. Residents who use private well water need to have it tested at least once per year for contamination.