| Ntahangwa River | |
| Pushpin Map: | Burundi |
| Subdivision Type1: | Country |
| Subdivision Name1: | Burundi |
The Ntahangwa River is a river in Burundi.
The river forms in the east of Bujumbura Rural Province and flows in a generally east–west direction into Bujumbura Mairie Province and the city of Bujumbura, where it enters Lake Tanganyika.
The Ntahangwa River is the most polluted stream flowing into Lake Tanganyika from Burundi.Despite this, a 1996 study concluded that its direct effect on the lake is negligible.
During a period of heavy rain in December 2016 the river flooded houses and two streets in the Kigobe and Mutanga Sud neighbourhoods of Bujumbura.An executive of the environment ministry said the river would be rehabilitated in the next three months.
In June 2017 residents in the rural Gikungu area of the Commune of Ntahangwa had been without water from REGIDESO Burundi for three months.They were forced to take water from the Ntahangwa River, but were afraid of catching diseases from the dirty water.REGIDESO said it was working on a solution.
In 2024 supporters of the English Arsenal F.C. football club and the Youth Committed to Environmental Advocacy (YCEA Burundi) planted 1,200 anti-erosion trees along the banks of the river.