On Feb. 2 the EPA announced a final regulatory determination for perchlorate in drinking water. This announcement from Lisa Jackson, Administrator for the US EPA, reversed a preliminary determination in 2008 not to regulate perchlorate. With this action the EPA initiated development of a national primary drinking water regulation (NPDWR) that, once finalized, will require certain potable water suppliers to take corrective action for high perchlorate levels. For more information on this regulatory action, please visit Http://water.epa.gov/drink/contaminants/unregulated/perchlorate.cfm

Dionex has been at the forefront of collaborating with the EPA Office of Ground Water and Drinking Water in Cincinnati, aiding in the establishment of EPA methods 314, 314.1, 314.2, 331, and 332 for determination of perchlorate. We recommend EPA 314.0 for analysis of drinking water and the more robust 314.2 for source waters with high amounts of chloride, carbonate, and sulfate.

Visit the perchlorate page on www.dionex.com for additional information.

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