Smackover Lithium, a joint venture between Standard Lithium Ltd. and Equinor, has announced the filing of its Definitive Feasibility Study (DFS) for the South West Arkansas (SWA) lithium project, marking a significant step in the development of what is being touted as North America’s highest-grade lithium brine reserve. The announcement, made on October 14, 2025, details the potential of the SWA project as a viable and sustainable source of lithium, critical for the battery SLI
As part of the DFS, Smackover Lithium aims to outline the economic viability and engineering feasibility required for large-scale lithium extraction, focusing on both project design and operational plans. The project’s significance is underscored by the previous advancements in Direct Lithium Extraction (DLE) technology, which Smackover Lithium has been developing in collaboration with Koch Technology Solutions. The field-testing conducted at the SWA site is intended to confirm engineering design parameters and enhance the project’s overall efficiency and environmental sustainability.
In a strategic partnership, Equinor has committed to investing up to $160 million for a 45% stake in two special purpose entities set up with Standard Lithium. This collaboration aims to bolster the sustainable development of lithium resources in the United States, reflecting a growing recognition of the need for domestic sources of critical minerals that are essential for the energy transition. The investment not only supports the advancement of the SWA project but also lays the groundwork for similar initiatives in East Texas.
The developments surrounding the South West Arkansas project come at a time when the demand for lithium is escalating, driven by the increasing adoption of electric vehicles and energy storage solutions. With its high-grade reserves and innovative extraction techniques, the SWA project positions itself as a potential leader in North America’s lithium supply landscape, advancing both corporate sustainability goals and energy independence initiatives.
As the SLI Smackover Lithium and its partners appear poised to contribute significantly to the evolving lithium market, addressing both economic and environmental challenges in the process.
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