Click here to view the 1,4-Dioxane Team Materials published in 2021

1,4-Dioxane is a likely human carcinogen that has been used in food additives and laboratory and manufacturing processes. It is also a byproduct of many chemicals used in household products, personal care products, plastics, and polyester, and from the 1950’s to 1996, 1,4-dioxane was commonly used in chlorinated solvents. 1,4-dioxane releases into the surrounding environment from wastewater discharge, unintended spills, leaks, historical disposal practices of host solvents, and unregulated manufacturing waste streams. These releases have impacted groundwater sites and potable drinking water sources across the country. Since no federal regulations currently exist for 1,4-dioxane, it is often overlooked as a contaminant of potential concern.

To address 1,4-dioxane contamination, some states have devised health standards or regulatory guidelines for drinking water and/or groundwater standards. However, many states do not have the necessary guidance to implement standards or guidelines and have expressed the need for input on 1,4-dioxane site assessment, detection, monitoring, and remediation. This project team will produce factsheets, a guidance document, and training curricula that reviews the technical knowledge and regulatory barriers to meet these needs. Topics include, but are not limited to: sources of contamination, detection technologies, remediation technologies, regulatory framework, and risk communication.