Lake Hawassa is one of the major Ethiopian Rift Valley Lakes having an endorheic basin system. The surrounding community makes use of the lake water for the multiple purposes of irrigation, domestic water supply, recreation and fish harvesting. The aim of the present study was to ascertain the water quality of the lake in terms of water quality indices (WQI) and its health over a period of three months covering both dry and wet seasons. Overall, the water quality of Lake was unfit and bad as per the weighted arithmetic method (120.06–228.29) and modified Bascarón water quality index (MBWQI) methods (26.81–33.89), respectively. However, the quality was indicated as marginal, as per the Canadian Council of Ministers of the Environment (CCME) water quality index method (44.2–51.1). On average, the lake was under the hypertrophic stage as per the standard based on the results of Secchi depth and nutrient concentration. The current study showed the lake being unfit for all-purposes as per WAWQI range (> 100). According to the physicochemical and biological parameters, of the lake, it requires mitigation measures to control Eutrophication and pollutants inflow.

哈瓦萨湖是埃塞俄比亚主要的裂谷湖之一，其内陆盆地具有吸水能力。周围的社区将湖水用于灌溉，生活用水，娱乐和鱼类收获等多种目的。本研究的目的是根据水质指数（WQI）及其在三个季节（包括干燥和潮湿季节）的健康状况来确定湖泊的水质。总体而言，根据加权算术方法（120.06–228.29）和改进的Bascarón水质指数（MBWQI）方法（26.81–33.89），莱克湖的水质不佳且较差。但是，根据加拿大环境部长理事会（CCME）水质指数方法（44.2-51.1），该质量被认为是微不足道的。一般，根据Secchi深度和养分浓度的结果，该湖处于根据标准的肥大阶段。当前的研究表明，根据WAWQI范围（> 100），该湖泊不适合所有用途。根据湖泊的理化和生物学参数，需要采取缓解措施来控制富营养化和污染物流入。