|Cities||Damak, Chapramari, Kohabara|
|- location||Illam, Nepal|
|- location||Kishanganj district, India|
The Ratua Khola or Ratuwa Khola (Nepali: रतुवा खोला) is a river in eastern part of Nepal. It originates from Chure Pahad of Nepal and merges with the Kankai River in Bihar, India. This river serves as the eastern border of Damak, a city in the eastern part of Nepal.
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