Figure 1b: Map of Bukavu showing where Bukavu town and the different zones where the different study sites (wells=souces) are located. These sources include Mulehe I, Mulehe II, Kahuranyi, Cemu Bagira and Kaliba localities belonging to Bagira zone; Kisima, Cemu Kadutu, Funu, Nyakaliba and Kadurhu are located in Kadutu zone; whereas Luziba, Gihamba, Ave- Maria, Kabangere and Mushununu are located in Ibanda zone. ZS Ibanda, ZS Kadutu and ZS Bagira zones are located on the above map.