“Design of a Rainwater Based Gravity Filtration System as a Sustainable Clean Water Solution for Household Scale in Kaliandra: Perancangan Sistem Filtrasi Gravitasi Berbasis Air Hujan sebagai Solusi Air Bersih Berkelanjutan Skala Rumah Tangga di Kaliandra” (2026) ANDIL Mulawarman Journal of Community Engagement, 3(3), pp. 136–142. doi:10.30872/j6v63781.