This study focused on designing a drinking water systems sustainability index for Integrated Water Resources Management in low-income countries. Water Supply Systems Sustainability Index (WSSI), a field assessment tool, was designed for rapid appraisal of drinking water systems in selected urban, peri-urban and rural Nigerian communities. The systems were classified into Highly Sustainable, Sustainable, Averagely Sustainable, and Unsustainable WSSI categories. Sanitary Risk Score (SRS) was assigned, classifying drinking water systems into Very High, High, Intermediate (Medium) and Low-Risk categories. WSSI results revealed that for urban systems, 90 are Highly Sustainable, 27 are Sustainable and 12 are Averagely Sustainable. For peri-urban systems, 13 are Highly Sustainable, 7 Sustainable and 1 Averagely Sustainable. Only urban hand-dug wells are in the Very High-Risk category. Public water supplies occurred only in the Low-Risk (17) and Intermediate-Risk (6) categories. Urban and rural boreholes had better quality than peri-urban boreholes. WSSI and SRS correlation result indicated strong positive correlation for urban hand-dug wells' (R² = 0.5688, at p < 0.05) and weak positive correlation between peri-urban hand-dug wells' (R² = 0.1847, at p < 0.05) and urban boreholes' WSSI and SRS (R² = 0.2032, at p < 0.05). Findings showed that drinking water systems are, generally, sustainable and WSSI could be incorporated into community-level water supply assessment.

这项研究的重点是为低收入国家设计用于水资源综合管理的饮用水系统可持续性指数。供水系统可持续发展指数（WSSI）是一种现场评估工具，旨在快速评估尼日利亚某些城市，郊区和农村社区的饮用水系统。这些系统分为高度可持续，可持续，平均可持续和不可持续的WSSI类别。分配了卫生风险评分（SRS），将饮用水系统分为极高，高，中（中）和低风险类别。WSSI的结果显示，对于城市系统，90个级别是高度可持续的，27个级别是可持续的，12个级别是平均可持续的。对于城市周边系统，有13个级别是高度可持续的，7个可持续性和1个平均可持续性。只有城市的手工挖井属于“高风险”类别。公共供水仅发生在低风险（17）和中风险（6）类别中。城乡井眼的质量要好于城郊井眼。WSSI和SRS相关结果表明城市手挖井的强相关性（R ² = 0.5688，在p <0.05时），并且城郊手挖井的井之间（R ² = 0.1847，在p <0.05时）与城市钻孔的WSSI和SRS（R ² = 0.2032，在p < 0.05）。调查结果表明，饮用水系统总体上是可持续的，并且WSSI可以纳入社区级供水评估中。