Nairobi River
Even though Dandora in Nairobi is one of the most polluted areas on earth, the Nairobi River is also one of the most polluted areas. Unfortunately, this river, similar to rivers in Asia, is used as a dumping ground for waste and trash. It’s also used as a source of water for drinking, bathing, and washing. Because many homes do not have a proper sewage system, a lot of the waste is dumped into the river, and then eventually consumed by locals.

Studies conducted on the Nairobi River have found levels of copper, chromium, zinc, and lead at high levels exceeding what’s deemed safe by the World Health Organization. Additionally, high levels of E.coli were also found, concluding the water was the cause of many outbreaks of cholera and typhoid (The Conversation).