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WPD | Superfund Sites

Remediation Section

Superfund Sites

Revised On: Nov. 13, 2023 - 10:00 a.m.

Some sites in Arizona are governed and funded by the federal Comprehensive Environmental Response, Compensation and Liability Act of 1980 (CERCLA), commonly known as Superfund. Sites that pose the greatest potential threat to public health and the environment are put on the National Priorities List (NPL). There are nine NPL Superfund sites in Arizona, two of which are divided into north and south portions. In addition to the NPL and the Water Quality Assurance Revolving Fund Registry sites, the Superfund Program Section also provides state review and oversight for the Department of Defense (DOD) sites.

National Priorities List Sites

The NPL is the Environmental Protection Agency's (EPA) list of the most serious uncontrolled or abandoned hazardous waste sites identified for possible long-term remedial response under Superfund. Inclusion of a site on the list is based primarily on the score the site receives under the Hazard Ranking System. Money from Superfund can be used for cleanup only at sites that are on the NPL.

Current NPL sites in Arizona: 

Cochise County

Maricopa County

Pima County

• Tucson Int'l Airport Area (TIAA) | View Site >

◦ 162nd Fighter Wing AZ Air National Guard (AANG) Project Area | View Site >

◦ Air Force Plant 44 (AFP-44)/Raytheon Project Area | View Site > 

◦ Airport Property Project Area | View Site > 

◦ Texas Instruments (formerly Burr-Brown) Project Area | View Site > 

◦ Tucson Airport Remediation Project (TARP) | View Site >

◦ West-Cap Project Area | View Site >

◦ West Plume B Project Area | View Site > 

Yavapai County

• Iron King Mine-Humboldt Smelter | View Site > 

Yuma County

• Marine Corps Air Station Yuma | View Site > 

Delisted NPL Sites in Arizona:

• 19th Avenue Landfill | View Site >

• Luke Air Force Base | View Site >

• Mountain View Mobile Home Estates | View Site >

Alternative Site

• ASARCO Hayden Plant | View Site >

In addition to the NPL and the WQARF sites, ADEQ's Superfund Program also provides state review and oversight for the Department of Defense (DOD) sites | View DOD Sites >