Mzuzu Central Hospital wastewater oxidation ponds discharge effluent onto Lunyangwa River, but data on its performance is scant. It was thus imperative to assess the performance in terms of levels of pH, EC, TDS, phosphates, feacal coliforms, biological oxygen demand (BOD₅) and total suspended solids (TSS) removal from the influent. Grab water samples were collected from the influent, facultative pond, effluent and upper, point of discharge and downstream of the discharge point. Levels of temperature, pH, EC, TDS were determined on site using HANNA instrument model H19812 pH-EC-TDS meter. Levels of BOD₅ were determined using DO meter. Feacal coliforms were determined using dilution method. Nitrates and phosphates were determined spectrophotometrically, whereas TSS was determined gravimetrically. Data was analysed using Minitab version 17. The removal efficiencies of TSS, TDS, E.coli, nitrates and EC were observed to be 46.67%, 59.43%, 96.23%, 6.34% and 59.34%, respectively. Except for E.coli, the performance of Mzuzu Central Hospital Wastewater Oxidation Ponds in removal of all parameter was generally low (i.e < 60%). In addition, the removal efficiencies of pH, temperature, PO₄³⁻ and BOD were −23.19%, −4.35%, −20.65% and −69.23%, respectively, indicating that regardless of the weak wastewater (BOD₅< 200 mg/L) of a raw wastewater collected, the performance of the oxidation is a challenge. Levels of BOD5, fecal coliform, phosphate, and pH, above Malawi Standards specifications for industrial effluents tolerance limits for Malawi in both the effluent and the receiving waters, were indicative of significant pollution resulting from the oxidation ponds, suggesting a pressing need for improvement in wastewater treatment in order to improve the water quality ratings prior to discharge into Lunyangwa River. There is also a dire need for risk communication and public sensitization with respect to the need to boil and filter the water prior to consumption for communities that rely on downstream of the discharge point as their drinking water sources.

姆祖祖中央医院的废水氧化池将废水排入伦扬瓦河，但有关其性能的数据很少。因此，必须根据pH值，EC，TDS，磷酸盐，粪便大肠菌群，生物需氧量（BOD ₅）和从进水中去除的总悬浮固体（TSS）的水平来评估性能。从进水口，兼性池，出水口和上部，排放点和排放点的下游收集抓取的水样。使用HANNA仪器型号H19812 pH-EC-TDS仪在现场确定温度，pH，EC，TDS的水平。BOD ₅水平用溶解氧仪测定。用稀释法测定粪大肠菌群。分光光度法测定硝酸盐和磷酸盐，而重量法测定TSS。使用Minitab版本17分析数据。观察到TSS，TDS，大肠杆菌，硝酸盐和EC的去除效率分别为46.67％，59.43％，96.23％，6.34％和59.34％。除大肠杆菌外，姆祖祖中央医院废水氧化池在去除所有参数方面的性能通常很低（即<60％）。另外，pH，温度，PO ₄ ^3-和BOD的去除效率分别为-23.19％，-4.35％，-20.65％和-69.23％，这表明无论废水较弱（BOD ₅<200 mg / L）的原始废水收集，氧化性能是一个挑战。BOD5，粪便大肠菌群，磷酸盐和pH值均高于马拉维工业废水对废水和接收水的马拉维耐受极限的标准，这表明氧化池造成了严重污染，表明迫切需要改进废水处理，以提高排放到轮羊洼河之前的水质等级。对于依赖排放点下游作为其饮用水源的社区，在饮用前需要对水进行煮沸和过滤的需求方面，也非常需要风险沟通和公众意识提高。