Water demands in the Kecamatan Kandis increases with population growth, especially in the area of Kandis Pasar Minggu and Kandis Kota. Population growth is calculated by the arithmetic method, least square and geometric, then calculated the percentage of service until 2035. Assumptions used IPA capacity 30 litet / sec, 50 liters / sec and 80 liters / sec. Samsam river minimum flow dependable is…