The major rivers in Imo State are Imo river, Otamiri river and Njaba river.
Imo River, being the major river in the State, drains through Abia State, where it is joined by Aba River from the North, and Akwa Ibom State into the Atlantic Ocean.
Otamiri River and its 9.2 km length tributary and Njaba River, Nworie River flow in the State.
There are other rivers in the state including Utu River, Awbana River, Okitankwo River in Umudi, and Ohia and Efuru Rivers in Okigwe.
The Orashi River also has its source in Imo State.