Comal River is the main stream in the drainage basin (Indonesian: daerah aliran sungai (DAS) Comal covering an area of 81,435.58 hectare which comprises three administrative regencies: Pemalang, Tegal and Pekalongan.[6] The upstram ia located at the border between the villages of Batursari and Penakir in the district of Pulosari and flowing to Java Sea.