Environmental Protection Agency arsenic standards

Maximum contaminant levels (MCLs) Drinking water standards for various contaminants that are enforced by the United States Environmental Protection Agency (US EPA) that take into account the risks of human health effects and the costs of cleaning the water (Appendix E). The current MCL for arsenic is 10 pg E 1 (40 Code of Federal Regulations 141.62). 

EPA. 1982b. An exposure and risk assessment for arsenic. Final draft report. U.S. Environmental Protection Agency, Office of Water Regulations and Standards. Washington, DC 4-64. 

The Environmental Protection Agency (EPA) has listed certain elements as potentially hazardous. In accordance with the Clean Air Act Amendment of 1970, EPA set final standards for mercury and beryllium and gave priority to several other elements as potentially hazardous. In the intercompany project, 13 of these elements were studied antimony, arsenic, beryllium, cadmium, chromium, cobalt, lead, manganese, mercury, molybdenum, nickel, selenium, and vanadium. 

In 2001 the Environmental Protection Agency (EPA) issued a rule reducing the standard for arsenic in public water supplies from 50 ppb (equivalent to 50 /ig/L) to 10 ppb, effective by2006. 

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