Is the orthophosphate corrosion inhibitor added to my drinking water safe?
Orthophosphate is a commonly used “corrosion inhibitor” that is added at the treatment plants. Orthophosphate works by forming a protective coating inside of service line pipes and fixtures in customer’s homes to prevent lead from leaching into drinking water. Orthophosphate is a food-grade chemical and is generally recognized as safe by the Food and Drug Administration and the EPA. Updated information on phosphate levels can be found here.
