Water supply and sanitation in Zimbabwe in Zimbabwe are the Zambezi River in the north, and the Limpopo River in the south. Several other rivers with significant watershed areas that flow through Zimbabwe are the Save, Manyame, and Sanyati Rivers. The biggest lake in Zimbabwe is Lake Kariba which is on the border with Zambia. There are several large aquifers in Zimbabwe. In urban centers of Zimbabwe the majority of the water supply comes from piped water. In rural areas, Zimbabweans predominantly rely on wells and boreholes that tap into Zimbabwe's groundwater supply. The construction of many wells was mainly financed by the households themselves. The
Zambia other major tributary is the Kalungwishi River, which flows into it from the east. The Luvua River drains Lake Mweru, flowing out of the northern end to the Lualaba River (Upper Congo River). Lake Tanganyika is the other major hydrographic feature that belongs to the Congo basin. Its south-eastern end receives water from the Kalambo River, which forms part of Zambia's border with Tanzania. This river has Africa's second highest uninterrupted waterfall, the Kalambo Falls. Zambia is located on the plateau of Central Africa, between 1000–1600 m above sea level. The average altitude of 1200 m generally has a moderate