Arizona has taken a significant legal step by deciding to participate in a lawsuit challenging the federal government’s recent strategy for managing water resources from the Colorado River. The state’s move comes amidst concerns over substantial water supply reductions that could severely impact Arizona’s economy.
Arizona Joins Legal Challenge Against Federal Water Plan
The federal management plan proposes a 20% reduction in Colorado River water allocations to Arizona, California, and Nevada until 2028, with the possibility of a 40% cut thereafter. Originally initiated by Nevada in August, the lawsuit contends that the federal strategy disproportionately affects water users in these states. Arizona has now filed a motion to intervene, arguing that the cuts are not only inequitable but also in violation of legal principles governing river use.
“Arizona believes the federal government’s new operating framework ignores basic elements of the law of the river and could result in cuts to the state apportionment that would devastate Arizona’s economy,” stated Tom Buschatzke, head of the Arizona Department of Water Resources.
Legal and Political Implications
The legal action taken is distinct from a potential Supreme Court case, which would likely require a state-to-state lawsuit. Arizona has expressed the possibility of suing over upstream states failing to deliver required water amounts but has not yet initiated such action. Buschatzke notes that legal recourse remains an option.
Nevada’s lawsuit, which Arizona seeks to join, alleges that the Bureau of Reclamation did not adequately assess the environmental and economic impacts of its management plan. The complaint highlights that despite warnings from Arizona, California, and Nevada about the detrimental effects of major water cuts, these were not sufficiently considered in the federal decision-making process.
Nevada Gov. Joe Lombardo commented, “Nevada will not accept a framework that puts our water supply and the future of our communities at risk. I welcome Arizona’s partnership as we work toward a fair agreement that requires all seven Basin states to share responsibility for protecting the Colorado River.”
Continued Negotiations Amid Legal Proceedings
The federal reductions and ensuing legal complexities follow years of unsuccessful negotiations among the seven states sharing the Colorado River’s resources. Although the Lower Basin states—Arizona, California, and Nevada—proposed voluntary cutbacks, the Upper Basin states—Colorado, New Mexico, Utah, and Wyoming—did not offer similar restrictions.
Arizona is currently negotiating with California and Nevada to distribute the impact of the federally mandated reductions, which are set to take effect on January 1, 2027. These discussions are part of the “Lower Basin Agreement,” aimed at mitigating Arizona’s heavy cutbacks by reallocating some of the burden to neighboring states.
Despite these negotiations, the lawsuit filed by Arizona is not expected to immediately halt the new federal water regulations. Legal experts, such as Cynthia Campbell, caution that the process may take time, as the lawsuit does not request an immediate suspension of the rules.
Arizona has proactively increased its legal defense budget for potential water-related litigation, enhancing its Colorado River litigation fund to $9 million.
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