Inspector general takes issue with EPA guidance on perchlorate
May 11, 2010

The EPA's office of inspector general has issued a report contesting the way in which the EPA established guidelines for safe exposure to perchlorate, noting that the risk assessment used an "outdated" method from 1954 to determine whether exposure to perchlorate put human health at risk. The report concludes that perchlorate probably isn't a major health risk unto itself, but needs to be considered as part of an overall batch of risk factors. It was particularly noted that lowering standards for safe levels of exposure from 24.5 ppb to 6 ppb probably wouldn't improve public health. Perchlorate rules are of particular significance to our region considering the widespread exposure to the chemical, particularly in western Iowa and much of Nebraska.

May 2010
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last revised May 2010