Tucson Arizona


1,4-dioxane was used as a stabilizer in industrial solvents in aircraft manufacturing facilities from the 1940s to the 1970s. It 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 seven million gallons of purified water a day.

Unified Community Advisory Board

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.

Next meeting

Date: Wednesday, July 19, 2017
Time: 5:45 p.m.
Location: El Pueblo Neighborhood Center, 101 W. Irvington Rd.
Contacts: Yolanda Herrera (520-991-3307) or Mary Aycock (415-972-3289)
More information at the EPA's Tucson International Airport Area page.


Additional Information:

History of AOP Water Treatment Facility