<![CDATA[Banjardowo Landfill in Jombang Regency operates a Leachate Treatment Plant (LTP) with a treatment capacity of 300 m3/day to minimize the environmental impacts of landfill leachate. However, monitoring results in 2025 indicated that Total Nitrogen concentrations in the treated effluent exceeded the discharge standard, indicating suboptimal treatment performance. This study aimed to evaluate the technical performance of the LTP and develop improvement strategies to support sustainable leachate management. A descriptive quantitative approach was employed through field observations, measurements of treatment units, technical document reviews, stakeholder questionnaires, and leachate quality analyses during the dry and rainy seasons. Technical performance was assessed by comparing existing unit conditions with design criteria and evaluating pollutant removal efficiencies, while SWOT analysis was used to formulate improvement strategies. The results showed that the LTP performance was constrained by excessive hydraulic retention time in the Leachate Storage Pond, insufficient biofilter media volume, low DO and MLSS concentrations, and unstable nitrogen removal. During the dry season, removal efficiencies for BOD, COD, TSS, Total Nitrogen, Cd, and Hg were 59.2%, 58.4%, 98.2%, 17.2%, 89.7%, and 95.5%, respectively. In the rainy season, removal efficiencies increased to 71.0%, 86.1%, 98.7%, and 99.6% for BOD, COD, TSS, and Total Nitrogen, while Cd and Hg complied with effluent standards. The SWOT analysis places LTP in Quadrant III with coordinates (-0.28; 0.88), indicating a turn-around strategy focused on optimizing the aeration and nitrification–denitrification processes, rehabilitating the constructed wetland, and strengthening operational monitoring. Keyword:  Leachate Treatment Plant, Technical Aspects, SWOT, Banjardowo Landfill]]>
