The flow of the Ọmambala River is released into the Atlantic through various outlets forming the 25,000-square-kilometre (9,700 sq mi) Niger Delta region.

[4] Omambala was the name of the ancient goddess whose river runs from the Uzo-uwa-ani underworld to Aguleri, Anam, Nsugbe and Onicha axis, where it connects with Nkisi & Niger-kwora/Mgbakili Rivers in their journey to the Atlantic Ocean, according to the indigenous people.

Currently, indigenous people from Aguleri, Anam, Nsugbe, Umueri, Anaku, Nteje, Umunya, Nando, Igbariam, Nkwelle-Ezunanka, Nzam, Awkuzu, Ogidi, Ogbunike, the Ayamelum clan, as well as others, make claims to the Omambala heritage.

[5] Omambala people have distinct dialects, customs, traditions and ethnophilosophical values with many mystical and esoteric belief systems that place a strong value on spiritualism over capitalism, and are held together by an eternal bond of custom, language, religious tradition and the Omambala River.

[5] The socio-economic, socio-cultural and socio-political influence of the Omambala region extends to parts of Edo, Delta, Imo, Rivers, Abia, Taraba, Benue, Niger, Nasarawa, Plateau, Akwa-Ibom & Cross-Rivers States of Nigeria and as far as Niger, Chad, Cameroon, Mali, Central African Republic, etc.