Abstract: According to the census report of household living conditions of March 2016, showed that 81.6% of the improved sanitation in Rwanda, uses pit latrines with solid slabs, as a result of the absence of a sewerage system/network in the country. Topography at high altitudes has caused significant surface and groundwater contamination in various areas, including Kigali, the capital city. Additionally, the high standard of living in the region and the lack of government funding to develop different projects for centralized sanitation have contributed to the complexity of wastewater management. A count of 1.3 million people in Kigali city has neither centralized sewage treatment nor central sewage networks. Due to untreated sewage being disposed inappropriately into the environment, they may have potential negative impacts on surface and groundwater resources.