“Effectiveness of Cascade Aerator Overflow System in Reducing Fe Levels in Excavated Well Water”. Gema Lingkungan Kesehatan 23, no. 4 (November 27, 2025): 574–581. Accessed December 9, 2025. https://gelinkes.poltekkes-surabaya.ac.id/index.php/gelinkes/article/view/205.