Udianto, F. et al. 2025. Effectiveness of Wastewater Treatment Plant in Reducing PO₄ and NH₃-N Pollutants at Tk. III Brawijaya Hospital Surabaya . Jurnal Hygiene Sanitasi. 5, 1 (Apr. 2025), 23–28. DOI:https://doi.org/10.36568/hisan.v5i1.99.