Title

Using the ELISA Method to Track Atrazine Occurrence in a National Monitoring Program

Document Type

Article

Journal/Book Title/Conference

J. American Water Works Association

Volume

98

Publication Date

2006

First Page

111

Last Page

123

Abstract

During the past two decades, numerous monitoring programs have been conducted to characterize the occurrence and use of atrazine, the most commonly applied herbicide in the United States. In 2003, AWWA and the Water Industry Technical Action Fund jointly sponsored the Atrazine Monitoring Program to expand on previous studies and assess atrazine occurrence patterns in US drinking water systems. A commercially available enzyme‐linked immunosorbent assay (ELISA) test method was used to determine atrazine occurrence in 38 water sources from 33 utilities surveyed. The ELISA method used, although relatively precise, was found to be inaccurate for many of the waters tested in this study; the testing kit has since been modified to address interferences caused by oxidants. However, the data presented here, collected using the original ELISA method, reflect observed “trends” in atrazine occurrence rather than accurate atrazine concentrations.

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