Objectives To ensure the safety of the public and the environment by monitoring and managing landfill gas and groundwater quality.
Location 945 W. Mission Ln
Waste Acreage 31.4
Operation Dates 1953 - 1962
Status Monitored Only Site
Type Groundwater Protection Project
Annual Budget approximately $30,000
Contact City of Tucson - Environmental Services 520-791-3175
Description The A-Mountain Landfill is located between the Santa Cruz River and Mission Road at the eastern base of A-Mountain. This landfill was used for the disposal of municipal solid waste from 1953-1962. Today the City monitors five shallow landfill gas probes quarterly. The landfill is owned and maintained by the City of Tucson.
Additional Info Low concentrations of volatile organic compounds (VOCs) have been detected in groundwater wells within the vicinity of the A-Mountain Landfill. All of these concentrations are below their respective the regulatory standard.
Activities Inspections, Landfill Gas Monitoring
Last Update Tuesday Mar 29, 2016
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Project Details

  • Updates
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  • October-December
    The City is scheduled to conduct an annual closed landfill inspection and report during this quarter.
  • January, April, July, & October
    The City conducts quarterly landfill gas monitoring at perimeter probes to monitor for methane migration beyond the property boundary. To date, no methane has been detected in perimeter probes.
  • December 4, 2012
    The city completed the final report for Groundwater Monitoring in 2012 at the A-Mountain Landfill. This report provides an analysis of data collected between June 2011 and September 2012, and is available for download in the report section of this website.
  • March 2011
    The City completed the Comprehensive Landfill Investigation and Closed Landfill Inspection reports. This landfill is discussed in both of these reports. These reports are available in the report/attachment section of this website.
  • 2011
    The City installed additional drainage improvements north of the landfill on Mission Lane.
  • 2009
    As part of the Rio Nuevo project, the City graded and capped the landfill to improve drainage in the area.
  • 2000
    The City installed three groundwater monitor wells and began routine monitoring.
  • 1995-1998
    The City installed shallow landfill gas monitor probes to monitor methane concentrations between the landfill and nearby homes and began routine monitoring.