GSI Authors Paper on 1,4-Dioxane Occurrence in Drinking Water

Dr. David Adamson is the lead author on “1,4-Dioxane Drinking Water Occurrence Data from the Third Unregulated Contaminant Monitoring Rule”, a newly-published paper in Science of the Total Environment.  Co-authors include GSI colleagues John Connor, Sharon Rauch, and Elizabeth Pina; Abigail Cartwright at Rice University, Hunter Anderson of the Air Force Civil Environmental Engineering Center, and Thomas Mohr of the Santa Clara Valley Water District.  This study confirmed that the 21% of the public water supplies detected this compound, a rate that ranks relatively high when compared to the other UCMR3 contaminants.  1,4-dioxane detections and exceedances were primarily associated with large systems, and there was a slightly greater likelihood that 1,4-dioxane was present in groundwater than surface water.  However, the comparable detection rates and concentrations in surface water and groundwater source run counter to the assumptions that 1,4-dioxane in drinking water is largely related to contaminated groundwater sites.  Furthermore, 1,4-dioxane showed evidence of a decreasing trend in concentration and detection frequency over time based on aggregated nationwide data.  

The publisher provides authors with a sharable link to download a free copy of the article through June 9:

For more information on this paper, please contact Dave Adamson at This email address is being protected from spambots. You need JavaScript enabled to view it..