Arizona Ends Fondomonte Mine Leases Amid PFAS Pollution Fears
Arizona Governor Katie Hobbs terminated Fondomonte’s Butler Valley mine leases over PFAS concerns.
Why it matters: Environmental and legal teams should prepare for increased regulatory scrutiny and potential litigation involving PFAS contamination and mining in Arizona.
- In October 2023, Arizona Governor Katie Hobbs ended Fondomonte’s state land leases in Butler Valley due to pollution concerns.
- Arizona Attorney General has filed lawsuits against PFAS product makers including 3M and DuPont for water contamination.
- Arizona Department of Environmental Quality (ADEQ) investigates PFAS contamination in six priority areas and monitors legacy sites like Senator Mine.
- Local tribes, including the Havasupai, oppose mining projects near the Grand Canyon over water and cultural risks.
In a significant regulatory move, Arizona Governor Katie Hobbs ended Fondomonte’s mining leases in Butler Valley in October 2023. This action followed concerns that the mining project could exacerbate contamination by per- and polyfluoroalkyl substances (PFAS), a class of persistent, potentially harmful chemicals found in products such as firefighting foams and nonstick cookware. PFAS contamination threatens groundwater critical to local communities.
The Arizona Attorney General’s office has also pursued litigation against major PFAS manufacturers, including 3M and DuPont, alleging these companies knowingly contaminated water sources. These legal actions signal intensified accountability pressures on industry from state regulators.
The Arizona Department of Environmental Quality (ADEQ) is investigating PFAS contamination at six high-priority locations, including near legacy mining sites like the Senator Mine. ADEQ focuses on protecting groundwater and surface water such as the Hassayampa River. Detailed ADEQ reports outline ongoing monitoring and mitigation efforts, while the Senator Mine FAQ details site-specific challenges.
Beyond PFAS, mining projects near culturally sensitive sites also raise concern. The Havasupai Tribe, whose ancestral lands include areas near the Grand Canyon, opposes uranium mining due to potential water and sacred site contamination. Conservation groups have publicly backed the tribe’s efforts to prevent environmental damage threatening their community's existence. Watchdog reports cover this ongoing dispute.
Meanwhile, decades of legacy pollution persist in sites like the Dewey-Humboldt Superfund area, plagued by historic arsenic and lead contamination related to previous mining and smelting operations. Local authorities have now prioritized cleanup efforts after 16 years, responding to community health concerns and visible environmental hazards such as the Hayden Smelter chimney. Recent reports document this progress.
This series of actions underscores Arizona’s complex challenge: balancing economic interests in mining with stringent environmental regulation and public health protection, particularly regarding persistent contaminants like PFAS and legacy mine pollutants.
By the numbers:
- October 2023 — Governor Hobbs ended Fondomonte’s mining leases in Butler Valley
- Six priority areas — ADEQ’s current PFAS groundwater contamination investigations
- 16 years — Dewey-Humboldt site listed as a Superfund area prior to cleanup efforts
Yes, but: While the Governor’s lease termination is a firm step, ongoing litigation and cleanup efforts highlight that full resolution of PFAS and legacy mine pollution risks remains complex and protracted.
What's next: Legal teams should monitor upcoming ADEQ regulatory updates and potential new lawsuits as PFAS contamination cases evolve in Arizona.