The Sunzha (Су́нжа, Сунжæ, Sunžæ, Соьлжа, Sölƶa) is a river in North Ossetia, Ingushetia and Chechnya, Russia, a right tributary of Terek River. It is 278 km long. The Sunzha rises on the Northern slope of the Caucasus Major. Its major tributaries are the Assa River and Argun River. With a turbidity of 3,800 g/m³, it carries 12,2 million tons of alluvium per year. It is used for irrigation. Cities which lie on the Sunzha include Nazran, Karabulak, Grozny (the capital of Chechnya), and Gudermes. During the Chechen Wars, the destruction of petroleum reservoirs caused the Sunzha to become polluted with petroleum.