In this study, we assess the quality of greywater for reuse in home gardens through irrigation in water-limited environments of the rural Limpopo province, South Africa. To address this objective, pH, Electrical Conductivity (EC), Potassium (K⁺), Calcium (Ca²⁺), Magnesium (Mg²⁺) and Sodium (Na⁺) were tested from the household sampled greywater e.g. kitchens, bath and laundry sampled. Hazards in greywater were determined using water quality indices and the derived results were assessed for any differences using ANOVA and Tukey method. The average pH values of study area 1 (STA1), study area 2 (STA2) and study area 3 (STA3) were found to be slightly alkaline (pH 8–9). Generally, most of the Sodium Adsorption Ratio (SAR) values where within the low category (1–10) indicating its acceptability for reuse. Most water quality parameters had high Soluble Sodium Percentage (SSP), with an average of 68.09%, 79.42% and 92.30% in STA1, STA2 and STA3, respectively. Further, the Kelley's Ratio (KR) indicate elevated levels of salt concentrations in greywater, with exceptions from laundry water in STA1. In contrary, residual chloride levels in all samples were found to be within the acceptable range (0–30meq/L) with <4meq/L having no restrictions. The study, therefore, concludes that untreated water can be used for home gardening irrigation with caution, unless it is diluted with freshwater.

在这项研究中，我们通过在南非林波波省农村的水资源有限的环境中进行灌溉，评估了家庭花园中回用灰水的质量。为了实现此目标，需要使用pH值，电导率（EC），钾（K ⁺），钙（Ca ²⁺），镁（Mg ²⁺）和钠（Na ⁺）是从家庭中抽取的灰水进行测试的，例如厨房，浴室和洗衣房。使用水质指数确定了灰水中的危害，并使用ANOVA和Tukey方法评估了衍生结果的任何差异。研究区1（STA1），研究区2（STA2）和研究区3（STA3）的平均pH值呈弱碱性（pH 8–9）。通常，大多数钠吸收率（SAR）值都在低类别（1-10）内，表明其可重复使用。大多数水质参数具有较高的可溶性钠百分比（SSP），分别在STA1，STA2和STA3中分别为68.09％，79.42％和92.30％。此外，凯利比率（KR）表示灰水中盐浓度的升高，但STA1中的​​洗衣水除外。相对的，发现所有样品中的残留氯含量都在可接受的范围内（0–30meq / L），<4meq / L没有限制。因此，研究得出的结论是，未经处理的水可谨慎用于家庭园艺灌溉，除非用淡水稀释。