Objectives To ensure the safety of the public and the environment by monitoring, managing, and controlling landfill gas and groundwater quality.
Location 2100 W. Starr Pass Blvd
Waste Acreage 21
Operation Dates 1962 - 1966
Status Monitored Only Site
Type Groundwater Protection Project
Annual Budget approximately $20,000
Contact City of Tucson - Environmental Services 520-791-3175
Description The Tumamoc Landfill is located near the intersection of Starr Pass Blvd and Greasewood Rd, at the southwestern base of Tumamoc Hill. This landfill was used for the disposal of municipal solid waste. The landfill is owned and maintained by the City of Tucson. Today the City monitors nine shallow landfill gas probes at the property boundary, and fourteen groundwater monitoring wells surrounding the landfill. Tetrachloroethene (PCE) and nitrates have been detected in the groundwater exceeding regulatory standards. The nitrates are likely due to land uses on surrounding properties (i.e. septic tanks).
Additional Info Although groundwater contamination has been detected above regulatory standards, there are no Tucson Water drinking water wells nearby.
Activities Inspections, Landfill Gas Monitoring, Groundwater Monitoring
Last Update Tuesday Jan 7, 2014
View this project on the Environmental Management Projects Map

Project Details

  • Updates
  • Pictures
  • Attachments


  • 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.
  • October - December
    The City is scheduled to conduct an annual closed landfill inspection during this period. A report will be prepared following this inspection, documenting the site conditions.
  • December 2015
    The City completed the annual groundwater monitoring report. The report is available under the attachments section of this website.
  • September 2013
    The City completed placing a soil cap on Tumamoc Landfill as part of the on-going maintenance program. The project was implemented to provide maintenance for the soil landfill cap and install onsite storm water drainage. Prior to the project, the landfill surface was uneven with areas of erosion, and visible areas of exposed trash. Improvements included landfill waste shaping to provide positive drainage, two feet of soil cover, and storm water controls such as drainage swales, rock dams, rocked ditches, and a culvert.
  • June 2010
    The City completed the 2009 Groundwater and Landfill Gas Monitoring Report. This report is available in the report/attachments section of this website.
  • 2002-2004
    The City installed 14 groundwater monitoring wells in both the regional groundwater and a perched groundwater layer 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.