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In-home formation and emissions of trihalomethanes: The role of residential dishwashers

Journal of Exposure Science & Environmental Epidemiology volume 14, pages 109–119 (2004)Cite this article

Abstract

This study involved an assessment of chloroform formation due to the use of hypochlorite-containing detergents in dishwashers. The objective of this research was to quantify in-home formation of trihalomethanes, particularly as related to dishwasher usage. A series of 14 flask and 15 laboratory experiments were completed. Flask experiments involved the mixing of food with dishwasher detergent in water for a 12-min reaction period, and were intended to identify chemicals and relative levels of those chemicals that may form from dishwasher usage with different food groups. Liquid concentrations of chloroform ranged from 1 to 41 mg/l. Laboratory experiments involved collection of liquid and gas samples over the course of an operating cycle with an actual residential dishwasher. Background concentrations of chloroform in the water supply were generally between 0 and 10 μg/l; liquid chloroform levels in the wash cycle were typically at least 50 μg/l. Chloroform concentrations were as high as 20 μg/l in the dishwasher headspace. Using mass balance equations for a typical residential house and laboratory results from this research, predicted concentrations resulting from dishwasher usage were similar to typical background concentrations in residential dwellings.

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Acknowledgements

The research described herein was supported by a US Environmental Protection Agency STAR Graduate Fellowship. We thank Mike Rynes for assistance with laboratory methods.

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Authors and Affiliations

  1. Department of Civil Engineering, Environmental and Water Resources Engineering, The University of Texas at Austin, Texas, USA

    David A Olson

  2. Department of Civil Engineering, Texas Institute for the Indoor Environment, 10100 Burnet Road, J.J. Pickle Research Campus, The University of Texas at Austin, Austin, 78758, Texas, USA

    Richard L Corsi

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  1. David A Olson
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  2. Richard L Corsi
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Correspondence to Richard L Corsi.

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Olson, D., Corsi, R. In-home formation and emissions of trihalomethanes: The role of residential dishwashers. J Expo Sci Environ Epidemiol 14, 109–119 (2004). https://doi.org/10.1038/sj.jea.7500295

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