Lake Narungazi is in the Commune of Ntega, Kirundo Province, to the east of Mugendo.

[4] The southern branch of Lake Narungazi, between the collines of Kanyago the east and Mugendo to the west, extends through Narungazi marsh, which is used for cultivation of rice up to the edge of the water, apart from some fragments of Typha domingensis and some tufts of Phragmites.

[7] Lake Narungazi is part of the Protected Aquatic Landscape of the North (French: Paysage Aquatique Protégé du Nord), a 162.42 square kilometres (62.71 sq mi) complex of 8 permanent freshwater lakes including lakes Rweru, Cohoha, Rwihinda, Kanzigiri, Gacamirindi, Nagitamo, Narungazi and Mwungere as well as marshes, that form part of the Nile Basin.

They have been the site of largescale invasions of water hyacinth, which has greatly decreased production and reduced fish stocks, as well as crowded out native vegetation.

The entrepreneur denied adding anything other than a ton of tilapia from Lake Rweru to the water.