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. ANDIL Mulawarman J Comm Engag 2026, 3 (3), 136-142. https://doi.org/10.30872/j6v63781.