Haesti Sembiring 2023. The Effectiveness of Zeolite-Activated Charcoal in Reducing Iron and Manganese Levels in Well Water of Milala Housing in Pancur Batu District, North Sumatra. Jurnal Multidisiplin Madani. 3, 9 (Sep. 2023), 1838–1843. DOI:https://doi.org/10.55927/mudima.v3i9.5993.