Erinle River
In the Yoruba tradition, Erinle is an ancient areana in Ido-Osun, this place is known to house large numbers of elephants and hippos in the old times.[4] Malaria and diarrhea are rampant in Osogbo, particularly in the high-density residential areas where the people depend on public tap water.[citation needed] Tests in June and July 2011 showed that treated water from the dam had a high presence of total coliform and was not suitable for drinking without further treatment.[citation needed] Bacteria in the treated water were also highly resistant to commonly used antibiotics in Nigeria.[7][full citation needed] The Erinle Dam, completed in 1989, is 330 metres (1,080 ft) above sea level.