Article
Reducing Perchlorates: A Comparison Of Hypochlorite Options
July 13, 2011
•Article: Reducing Perchlorates: A Comparison Of Hypochlorite Options
By James P. Brennan, Arch Chemicals, Inc.
The Environmental Protection Agency is proposing to regulate perchlorate. Although the EPA does not currently regulate perchlorate in drinking water, it has published an Interim Health Advisory of 15 ppb for exposure to perchlorate from ingesting drinking water.
There is a growing concern about the impact of perchlorate on human health due to introduction from sodium hypochlorite solutions into drinking water. According to the EPA, the potential effect of perchlorate is secondary, or indirect, meaning that the presence of perchlorate in water may reduce the bioavailability of iodine, thus leading to human nutritional deficiency of that element. Because of this, the emerging EPA strategy is to move forward with proposing a formal rule. If a stringent maximum contaminant level for perchlorate is established, it will impact the way many drinking water utilities handle chlorination.
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