This document has been prepared to allow toxicological evaluation of the unregulated contaminant iodine in drinking water, as an extractant from one or more drinking water system components tested under NSF/ANSI 61 (2002) or as a contaminant in a drinking water treatment chemical under NSF/ANSI 60 (2002). Iodine has also been evaluated as a drinking water treatment chemical for direct addition to water under NSF/ANSI 60 (2002). Both non-cancer and cancer endpoints have been considered, and risk assessment methodology developed by the U.S. Environmental Protection Agency (U.S. EPA) has been used.

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