Will Water, Not Lithium, Become America's Biggest Battery Bottleneck? New Study Sounds the Alarm

Highlights

• Researchers modeled water availability for 22 proposed U.S. lithium mines under five climate models and four socioeconomic scenarios through 2050.
• Many watersheds slated for lithium mining already face water stress, with competing demands from agriculture, industry, and municipalities worsening the outlook.
• Water scarcity could force greater U.S. reliance on lithium imports just as demand for EVs, grid storage, and defense batteries accelerates.
• The study strengthens the case for direct lithium extraction, closed-loop water recycling, and battery recycling to reduce mining water intensity.
• Experts warn that critical mineral security depends on water access, permitting, infrastructure, and labor—not just ore grade or geology.

---

America's race to build a domestic lithium supply chain may face an unexpected obstacle: water. In a new study published in Communications Earth & Environment, lead author Jenna N. Trost of Northwestern University and the U.S. Geological Survey (USGS), working with Nedal T. Nassar (USGS) and Jennifer B. Dunn (Northwestern University), examined whether sufficient freshwater will exist to support the nation's one operating and 22 proposed lithium mines by mid-century. Using five climate models and four socioeconomic-climate scenarios, the researchers found that many future mining regions could face significant water shortages—not only for mining, but also for agriculture, industry, and local communities. Depending on how climate and society evolve, water scarcity could become a major constraint on U.S. lithium production, potentially increasing reliance on imports just as demand for batteries, electric vehicles, and grid-scale energy storage accelerates.

Climate Change Meets Critical Minerals

Lithium has become one of the world's most strategic minerals. It is essential for rechargeable batteries used in electric vehicles, renewable energy storage, consumer electronics, and many defense technologies. Yet producing lithium—particularly from brine deposits and some hard-rock operations—can require substantial volumes of water.

That raises an increasingly important question: Will enough water exist where America's future lithium mines are planned?

According to this study, the answer is far from certain.

How the Researchers Studied the Problem

The research evaluated one operating and 22 proposed U.S. lithium mines using five global climate models combined with four socioeconomic-climate scenarios projecting conditions to approximately 2050.

Rather than simply estimating rainfall, the team modeled freshwater availability within individual watersheds while accounting for competing demands from households, agriculture, manufacturing, and other water users. They then compared projected water availability against estimated mining water requirements for different lithium deposit types.

What the Study Found

The exact results varied by climate scenario, geographic region, and deposit type, but one message consistently emerged: water availability could become a significant limiting factor for future domestic lithium production.

Many watersheds expected to host new lithium mines already experience water stress today. Rising temperatures, shifting precipitation patterns, and increasing demand from growing populations could further tighten supplies.

Under many modeled scenarios, available water was insufficient not only to satisfy projected mining demand but also to meet growing needs from agriculture, industry, and municipalities.

For investors, policymakers, and developers, the study underscores an important reality: discovering a lithium deposit does not guarantee a viable mining operation. Water availability may ultimately prove as important as ore grade, metallurgy, permitting, financing, infrastructure, and community support.

Why This Matters

The findings reinforce a broader lesson that Rare Earth Exchanges has highlighted repeatedly: critical mineral security depends on far more than geology. Reliable access to water, electricity, processing chemicals, transportation infrastructure, environmental permitting, and skilled labor increasingly determines whether strategic mineral projects actually reach commercial production.

The study also strengthens the case for technologies and policies that reduce water intensity, including direct lithium extraction where appropriate, expanded water recycling, closed-loop processing systems, battery recycling, and diversified domestic and allied supply chains.

Important Limitations

The study is a modeling exercise, not a prediction of exactly what will occur. Its conclusions depend on assumptions about future climate conditions, population growth, economic development, water management practices, and the pace of mine development. In addition, mining technologies may evolve substantially over the coming decades, potentially reducing water consumption compared with current estimates.

The authors also focused specifically on water availability. The study does not evaluate project economics, permitting timelines, financing, technological feasibility, market conditions, or geopolitical developments that will also influence whether proposed lithium mines are ultimately built.

Looking Ahead

For years, discussions about America's lithium future have centered on geology, permitting, and reducing dependence on Chinese supply chains. This study argues that another resource deserves equal attention: freshwater. As the United States seeks to expand domestic critical mineral production, long-term water planning may become just as important as discovering the next major lithium deposit. The future battery supply chain, the authors suggest, may depend as much on hydrology as on geology.

Citation

Trost, J.N., Nassar, N.T., & Dunn, J.B. Future Water Constraints on United States Lithium Mining Under Climate Change. Communications Earth & Environment. Published May 28, 2026. DOI: 10.1038/s43247-026-03643-4.