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 currently regulate 1,4-dioxane, in 2011 it issued a new health advisory for drinking water utilities of 0.35 parts per billion, significantly lower than the previous 3.0 parts per billion.

To address the new level, Tucson Water has constructed a new treatment facility with state-of-the-art technology to effectively remove 1,4-dioxane from water.

Construction of this 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.

Anyone interested in the process to remove levels of TARP-area contaminants may attend a Unified Community Advisory Board (UCAB) meeting. The next quarterly UCAB meeting will be Wed., October 21, 2015, at 5:45 p.m. at the El Pueblo Neighborhood Center, 101 W. Irvington Rd. Contact either Yolanda Herrera at (520) 991-3307 or Martin Zeleznik at (415) 972-3543 for more information or e-mail acuinteriors@aol.com.

Click here for additional resources, including Monthly Sample Points Map, pamphlet, fact sheet, EPA Superfund Site newsletters, and information in Spanish.