Objectives To ensure the safety of the public and the environment by monitoring, managing, and controlling landfill gas and site safety.
Location 425 N. Grande Ave
Waste Acreage 10.4
Operation Dates 1963 - 1973
Status Monitored Only Site
Type Groundwater Protection Project
Annual Budget approximately $20,000
Contact City of Tucson - Environmental Services 520-791-3175
Description St. Mary’s Landfill is located at Menlo Park near Grande Ave and St. Mary’s Rd. The landfill was used for the disposal of Class II trash and debris consisting primarily of green waste and construction debris. Today the City monitors 29 landfill gas probes on a quarterly basis, and inspects the landfill annually for erosion and other potential issues.
Additional Info Evaluation of historical operational records from the landfill indicates that it is a low future environmental risk.
Activities Inspections, Landfill Gas Monitoring
Last Update Thursday Apr 7, 2016
View this project on the Environmental Management Projects Map

Project Details

  • Updates
  • Pictures
  • Attachments


  • October-December
    The City is scheduled to conduct an annual closed landfill inspection. A report will be prepared following this inspection documenting the site conditions.
  • January, April, July, & October
    The City conducts quarterly landfill gas monitoring at perimeter probes during these months every year to monitor for methane migration at the property boundary.
  • 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.
  • 1995-1998
    The City installed shallow landfill gas monitor probes to monitor methane concentrations between the landfill and nearby businesses and began routine monitoring.