This study assessed the quality of drinking water in the water supply system for the City of Harare (Zimbabwe) by investigating the occurrence of algae and other water quality parameters that affect its growth. At Morton Jaffray Water Treatment Works (MJWTWs), samples were collected from the raw water inlet and treated water outlet points. In the distribution system, samples were collected from selected sites and grouped into four zones (1, 2, 3 and 4). The algal taxonomic groups that were found in both raw and treated water comprised of Cyanophyceae, Chlorophyceae, Bacillariophyceae, Euglenophyceae and Dinophyceae. It was found out that Microcystis aeruginosa followed by Anabaena were the most abundant species in both raw water and in the distribution system. All measured water quality parameters were within the Standards Association of Zimbabwe and WHO guideline values except for chlorine which had an average residual chlorine concentration that was lower than the WHO recommended lower value of 0.2 mg/L in parts of Zone 2. Morton Jaffray Water Treatment Works does not completely remove algae, and there is a carry-over of algae into the distribution system. Boosting of chlorine is recommended for Zone 2 that had residual chlorine less than the WHO minimum threshold of 0.2 mg/L.

这项研究通过调查藻类的发生和影响其生长的其他水质参数，评估了哈拉雷市（津巴布韦）供水系统中饮用水的质量。在莫顿贾弗瑞水处理厂（MJWTW），从原水进口和已处理水出口处采集样品。在分配系统中，样本是从选定的地点收集的，并分为四个区域（1、2、3和4）。在原水中和处理后的水中发现的藻类分类群包括蓝藻科，绿藻科，芽孢杆菌科，裸藻科和恐龙科。发现铜绿微囊藻，其次是鱼腥藻是原水和分配系统中最丰富的物种。所有测得的水质参数均在津巴布韦标准协会和WHO准则值范围内，但在2区部分地区的平均氯残留浓度低于WHO推荐的最低值0.2 mg / L的氯除外。Morton Jaffray水处理Works不能完全清除藻类，并且藻类会残留到分配系统中。对于残留氯低于WHO最低阈值0.2 mg / L的2区，建议提高氯含量。