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WQARF | Shannon Road/El Camino del Cerro - Overview


Shannon Road/El Camino del Cerro | Overview

Revised On: Jan. 4, 2024 - 10:43 a.m.

Registry placement date: hannon Road-Rillito Creek site on April 23, 1999; El Camino del Cerro site on Aug. 18, 1998; the two sites were combined in the fall of 2004 based on sampling results showing a single plume

Score: 40

County: Pima


Downtown Tucson, approximately bounded by Speedway Boulevard to the north, Eighth Street and the Union Pacific Railroad to the south, Fourth Avenue to the east and Ninth Avenue to the west.

If you own a private well, live in or near the site boundaries, and have not had your well tested, please contact ADEQ.

Contaminants of Concern

Tetrachloroethene (PCE), trichloroethene (TCE) and cis-1,2-dichloroethene (cis-1,2-DCE)

Action Taken

The contaminant plume impacted three community wells, which were removed from service. One of these wells was returned to service with a wellhead treatment system removing contaminants of concern to meet drinking water standards.


ADEQ is currently drafting a Record of Decision for the site.

Community Advisory Board (CAB)

Established and meets on a regular basis. A list of CAB members and their contact information is available in the Community Involvement Plan (CIP) | View/Download CIP >