A 320 m³/h treatment system was completed in Dumbrăvița, Romania in 2020. This project focused on addressing the issue of groundwater contamination due to high levels of iron and manganese. To effectively treat the water, a combination of multi-media filtration and on-site ozone generation was implemented. By employing these advanced techniques, the challenges associated with iron and manganese removal from the groundwater were successfully overcome. The treatment system achieved the required flow rate and ensured the removal of contaminants to meet the necessary quality standards.