1,4-Dioxane Information

1,4-dioxane was used as a stabilizer in industrial solvents in aircraft manufacturing facilities from the 1940s to the 1970s and was detected in groundwater at the Tucson Airport Remediation Project (TARP) well field. Though the EPA does not regulate 1,4-dioxane, in 2011 it issued a new health advisory for drinking water utilities. To address this, Tucson Water constructed a new treatment facility with state-of-the-art technology to effectively remove 1,4-dioxane from water.

Construction of the Advanced Oxidation Process (AOP) Water Treatment Facility began in July 2012 and was completed in January 2014. It operates in conjunction with the adjacent TARP facility to produce up to 8 million gallons of purified water a day.

A Unified Community Advisory Board (UCAB) was formed in 1995, comprised of area residents and government agencies. Anyone interested in the process of removing levels of TARP-area contaminants and preserving our groundwater quality may attend a UCAB quarterly meeting. The next UCAB meeting will be Wed., October 19, 2016, at 5:45 p.m. at the El Pueblo Neighborhood Center, 101 W. Irvington Rd. Contact either Yolanda Herrera at 520-991-3307 or Mary Aycock at 415-972-3289 for more information.

Click here for a page of archived resources, including a fact sheet, EPA Superfund Site newsletters, and more information in Spanish.