Arizona officials warned the federal government that further reductions in Lake Mead's water levels could trigger a lawsuit over Colorado River Compact violations.

Overview Debates Related claims Topics Sources

Former Homeland Security Secretary Kristi Noem invoked a 1996 federal immigration law to waive environmental protection and historical preservation compliance for physical border barrier construction in the Big Bend Sector

U.S. District Judge Kathleen Cardone issued a preliminary injunction blocking border wall construction in the Big Bend Sector, ruling that Homeland Security secretaries Kristi Noem and Markwayne Mullin exceeded their legal authority in issuing environmental-law waivers

Homeland Security Secretary Markwayne Mullin, appointed after Kristi Noem's dismissal earlier in 2026, issued two additional legal waivers beyond Kristi Noem's earlier waiver permitting Customs and Border Protection to build barrier systems in Texas's Big Bend Sector

Governor Abigail Spanberger also demanded protections against customer disconnections and increased clean energy investments as conditions for supporting the NextEra-Dominion merger.

The Constitution Pipeline received federal approval in 2014, but New York regulators denied a required water-quality certification in 2016, leading developers to abandon the project in 2020

Lawsuits and opposition statements filed by environmental advocates argue that commercial deep-sea mining off American Samoa will pollute local ocean waters, destroy benthic habitats, and harm island communities

Marine Minerals Administration Director Mike Olsen stated that the Marine Minerals Administration must balance national security goals with environmental stewardship and engagement with American Samoa leadership

Oceana Defense Campaign Manager Julia Singer warned that the November 19 deep-sea mining lease sale off American Samoa opens ocean habitats to exploitation while ignoring opposition from scientists and local Pacific leaders

Environmental groups Faʻasao Amerika Samoa and Conservation Council for Hawaii, represented by Earthjustice, filed an August 2026 lawsuit in Hawaii federal court challenging BOEM's plan for an ocean mining lease sale off American Samoa

Lake Mead and Lake Powell have dropped to record low levels due to persistent drought, climate change, and overuse.

Arizona filed a motion to intervene in Nevada's federal lawsuit against the Trump administration on October 16, 2026, challenging federal operational plans for the Colorado River.

Nevada initially filed its lawsuit in August 2026 to block the U.S. Department of the Interior's 10-year operational guidelines for the Colorado River Basin.

An Interior Department spokesperson rejected Arizona Governor Katie Hobbs's position as wrong and asserted that the department would operate in good faith.

California, Arizona, and Nevada agreed to voluntarily cut 3.2 million acre-feet of Colorado River water usage total through 2028.

The federal operational plan exempts Upper Basin states—Wyoming, Colorado, Utah, and New Mexico—from mandatory Colorado River water cutbacks.

The Rocky Mountains recorded their lowest snowpack on record in 2026, leading to reduced snowmelt inflows into Colorado River reservoirs.

Arizona Governor Katie Hobbs stated she will not accept a forced federal plan that addresses the water crisis solely through Lower Basin sacrifices.

The federal government intervened to impose water restrictions after seven Colorado River Basin states missed multiple deadlines to reach a consensus.

The federal plan allows mandatory cuts of up to 3 million acre-feet per year for Lower Basin states between 2029 and 2036, representing up to a 40 percent reduction.

Nevada's legal complaint contends the Interior Department failed to evaluate alternatives requiring Upper Basin states to shoulder water cutbacks.