Jurnal Sinergitas PKM dan CSR, Vol.4, No.3, Desember 2020 DOI: http://dx.doi.org/10.19166/jspc.v4i3.2539 p-ISSN: 2528-7052 | e-ISSN:2528-7184 Received: Revised: Published: 320 WATER TREATMENT IN RAUDHATUL ISLAMIYAH MOSQUE JAWA TENGAH VILLAGE, SUI.AMBAWANG SUB DISTRICT, KUBU RAYA DISTRICT Ulli Kadaria 1 , Aini Sulastri 2 1,2 Jurusan Teknik Lingkungan, Universitas Tanjungpura e-Mail 1 : ulli.kadaria@gmail.com Abstract Raudhatul Islamiyah Mosque which is located on Jl.Trans Kalimantan, Jawa Tengah Village, Sungai Ambawang District, Kubu Raya District is one of the mosques that had problem in fulfill the demand of clean water for flushing and daily activities. The water used comes from artesian well whose quality and quantity were inadequate. This had an impact on the damage to mosque facilities such as faucet because of rust and the bathtub turn brownish yellow. Besides flushing, activity in the form of mouthwash - gargle using water that was yellowish brown and smelly can potentially cause disease because of the presence of iron, organic matter, microbes, and others. Therefore it needed a water treatment that treats water quality so that it was safe to use. Water treatment was designed using aeration and shell sand filtration with a processing capacity of 1000 liters. The method used in this activity was the participatory method where the youth at the mosque participated in socialization and training activities, making water treatment plants, operation and maintenance water treatment equipment. In addition there was an operational standard manual to facilitate the operation and maintenance of the water treatment equipment. Keywords: Clean water; wells; aeration; filtration