Marine Corps Air Station Yuma

Marine Corps Air Station Yuma - runway

Superfund Site | Marine Corps Air Station Yuma

EPA #: AZ0971590062

Superfund National Priority List (NPL) Placement: The EPA listed this site on Feb. 21, 1990


Marine Corps Air Station (MCAS) Yuma occupies approximately 4,800 acres within the city and county of Yuma, Arizona. The site is bounded by South Avenue 3E on the east, 32nd Street on the north, East County 14th Street on the south, and the city of Yuma Main Canal on the west. Plume boundaries vary and may extend beyond the site boundary while remaining part of the Superfund site in its entirety | View Map >

Contaminants of Concern (COCs) / Risk Impact

  • Soil I  Soil COCs include total residual petroleum hydrocarbons (TRPH), polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), pesticides and metals.
  • Groundwater I  Groundwater COCs include chlorinated solvents (trichloroethene (TCE), dichloroethene (DCE), tetrachloroethene (PCE) and volatile organic compounds (petroleum hydrocarbons).
  • If you are connected to a public water system (PWS) there is little to no risk of impact from exceedances because the water is filtered through the PWS for residential and business use | View Drinking Water Notices >
  • If you have a private well in the vicinity of the exceedance, we encourage you to test the well water.
  • Not sure what to test for? | Learn More >
  • Other I   Munitions and explosives of concern (MEC), per- and polyfluoroalkyl substances (PFAS)

COCs at the site may change as new data become available.

Action Taken

During its 70 years of operation, MCAS Yuma generated industrial wastes such as used oil, solvents, paint residues, battery acid, pesticides, herbicides, polychlorinated biphenyls, asbestos in the form of non-friable asbestos containing material (ACM), and petroleum hydrocarbons from a jet fuel leak. The ACM was scattered on top of, and buried in, the surface soil. It was remediated in 1999.

The federal facilities agreement and assessment program identified three operable units (OUs): OU-1 contains contaminated groundwater and soil deeper than 10 feet below ground surface (bgs). OU-2, which is comprised of 18 Comprehensive Environmental Response Compensation and Liability Act (CERCLA) Area of Concern (CAOC) sites, contains contaminated soil from ground surface to 10 feet bgs. OU3 did not identify any specific CERCLA sites and is thus intended to be used for future sites if required.