Limited wastewater treatment contributes to water quality degradation of water bodies in Malawi, Lunyangwa River (LR) in Mzuzu is no exceptional. There is lack of comprehensive and regular monitoring of wastewater treatment plants and surface water quality in Malawi mainly due to inadequate funding and laboratory facilities. This study assessed overall performance of Mzuzu University Wastewater Treatment Plant (MUWWTP) and its impacts on receiving waters namely the Luwinga stream (LS) that drains into LR. Representative duplicate grab samples (n = 40) were collected from eight sampling points from the treatment stagess of MUWWTP, upstream (control) and downstream of LS in five sampling campaigns from January to April 2019. Onsite tests were carried out for pH, temperature, Electrical Conductivity (EC), and Dissolved Oxygen (DO), whereas Total Suspended Solids (TSS), Total Solids (TS), Biochemical Oxygen Demand (BOD₅), Chemical Oxygen Demand (COD), Nitrate (NO₃⁻), Ammonium (NH₄⁺), and Total Phosphorus (TP) were analyzed at the Government Central Water Laboratory in accordance with the American Public Health Association (APHA) Standards of 2014. Except pH (9.39), the rest of the parameters were within Malawi Effluent Standards (MS691:2005) and Environmental Protection Agency (EPA) Effluent Guidelines of 2014TDS (118.8 mg/L); DO (6.57 mg/L); TSS (18 mg/L); BOD₅ (4.5 mg/L); COD (51.4 mg/L); NO₃⁻ (0.01 mg/L); TP (0.11 mg/L) and NH₄⁺ (0.003 mg/L). Furthermore, MUWWTP effluent did not impact stream water quality as evidenced by the recommended scores with respect to surface water quality regulation and Water Quality Index. There is need to regularly monitor effluent and stream water quality.

有限的废水处理导致姆祖祖（Mzuzu）的伦扬瓦河（LR）的马拉维水体水质退化，这并非例外。马拉维缺乏对废水处理厂和地表水水质的全面和定期监控，这主要是由于资金和实验室设施不足所致。这项研究评估了姆祖祖大学废水处理厂（MUWWTP）的总体性能及其对接收水的影响，即排入LR的卢温加河（LS）。代表性重复样本（n = 40）是从MUWWTP处理阶段，LS的上游（对照）和下游的八个采样点收集的，从2019年1月至2019年4月进行了五次采样活动。进行了pH，温度，电导率（EC），和溶解氧（DO），而总悬浮固体（TSS），总固体（TS），生化需氧量（BOD ₅），化学需氧量（COD），硝酸盐（NO ₃ ^- ），铵（NH ₄ ⁺）和总磷（TP）在政府中央水实验室根据2014年美国公共卫生协会（APHA）标准进行了分析。除pH值（9.39）外，其余参数均在马拉维污水处理标准（MS691： （2005年）和2014TDS的环境保护局（EPA）废水指南（118.8 mg / L）；溶解氧（6.57 mg / L）; TSS（18毫克/升）; 生化需氧量₅（4.5 mg / L）; 化学需氧量（51.4 mg / L）; NO ₃ ^-（0.01毫克/升）; TP（0.11 mg / L）和NH ₄ ⁺（0.003 mg / L）。此外，MUWWTP出水不影响溪水水质，有关地表水水质调节和水质指数的推荐评分证明了这一点。需要定期监测废水和溪流水的质量。