Standard Lithium Ltd. Reaches Milestone with High Lithium Concentration in Arkansas Exploration
- Standard Lithium Ltd. completes the Lester well, achieving a record lithium concentration of 616 mg/L in South West Arkansas.
- The average lithium concentration in brine samples from the Smackover Formation is 582 mg/L, indicating significant resource improvement.
- Standard Lithium aims for a Definitive Feasibility Study by late Q3 2025, driving the project towards sustainable lithium production.
Standard Lithium Ltd. Achieves Key Milestone in Lithium Exploration
Standard Lithium Ltd., in partnership with Equinor, reaches a significant milestone in its South West Arkansas (SWA) Project with the completion of the Lester well. As of July 15, 2025, the well showcases the highest lithium concentration recorded in the area, yielding an impressive 616 mg/L of lithium in brine. This result surpasses the previously anticipated levels of around 500 mg/L and marks a pivotal moment in the project’s development. The successful completion of the Lester well concludes Phase 1 of the SWA Project's exploration activities, which began in the second quarter of 2025.
Independent laboratory analyses reveal that the average lithium concentration from three brine samples taken from the upper Smackover Formation stands at 582 mg/L, indicating a substantial improvement over existing resource levels. Dr. Andy Robinson, President and COO of Standard Lithium, expresses optimism regarding these findings, emphasizing the project’s potential to contribute significantly to sustainable lithium production. The high lithium concentrations not only enhance the feasibility of the project but also align with the growing global demand for lithium as a critical resource in battery technologies.
With the completion of fieldwork, the Smackover Lithium team shifts its focus to finalizing the Front-End Engineering Design (FEED) study. A Definitive Feasibility Study is expected by late Q3 2025, which will be crucial for advancing the project to the next stage. These studies are essential as they will facilitate off-take negotiations and project financing, ultimately aiming for a Final Investment Decision by the end of 2025. Standard Lithium holds a 55% interest in the joint venture, while Equinor owns the remaining 45%, and both companies are committed to leveraging Direct Lithium Extraction (DLE) technologies to ensure environmentally sustainable lithium production.
In addition to the promising results from the Lester well, the partnership between Standard Lithium and Equinor illustrates a strategic collaboration aimed at addressing the burgeoning demand for lithium. As the global shift towards renewable energy and electric vehicles intensifies, the SWA Project positions both companies advantageously in the evolving landscape of lithium extraction and supply. The successful exploration outcomes reinforce the viability of the project, setting a solid foundation for future endeavors in sustainable lithium production.
