Oxyanions are a major concern as groundwater pollutants, yet they have traditionally been considered chemically unreactive due to their weak nucleophilicity, lack of complexation, and resistance to redox processes. Their multi-electron and multi-proton reactivity further complicates their catalytic reduction, presenting a significant challenge. To tackle this issue, our research focuses on developing transition metal complexes—particularly iron-based systems—designed to enable these challenging transformations. Through strategic ligand design, we seek to enhance iron's reactivity and facilitate the selective reduction of oxyanions under mild conditions. This presentation will showcase our latest progress in creating iron catalysts tailored for oxyanion reduction, shedding light on mechanisms and the approaches used to address them.