EPA’S Adoption of LNT for Cancer Risk Assessment

By Edward J. Calabresea, & Robert J. Golden – Re-Blogged From Junk Science

1. IntroductionThe US Congress passed, and President Richard Nixon signed intolaw the Safe Drinking Water Act in 1974. A significant provision of theAct involved engaging the US NAS to advise the EPA on multiple sci-entific and technical areas such as chemical and radiation risk assess-ment, including cancer risk assessment. To achieve these goals the NAScreated the Safe Drinking Water Committee (SDWC) in 1975. In 1977the SDWC published the 700 pageDrinking Water and Health[1] reportoffering EPA widespread guidance, including cancer risk assessmentand its underlying scientific foundations that supported the LNT.Within two years EPA would issue the first national drinking waterstandard for a chemical carcinogen using the LNT for total trihalo-methanes (THM) [2]. This action would jump start an avalanche ofother LNT based cancer risk assessments by EPA, not just for drinkingwater but for other environmental media as well.

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