水质指数(WQI)很重要，因为它有助于理解复杂的水质数据。为此，对依米灵吉河水质质量指数进行了评价，以明确划分水质等级。除了位于奥斯旺社区上游的石油设施产生的渗漏外，垃圾场的渗滤液和农业径流是一些可能的非点源污染源。由于河流在干旱期退潮，因此在2019年8月的雨季在五个野外地点的重复点收集了样本。按照标准分析方案对十(10)个水样进行了物理和化学测试。得到的结果是:电导率(32.7 ±);2.7微秒/厘米)，铁(2.57微秒/厘米);0.53 mg/L)，溶解固体(18.1 mg/L;1.4 mg/L)， pH (5.2 ±0.1)，碱度(1.1 & +; 0.1 mg/L), hardness (1.4 ± 0.2 mg/L), calcium (0.34 ± 0.03 mg/L), magnesium (2.08 ± 0.32 mg/L), dissolved oxygen (10.5 ± 0.7 mg/L), chloride (9.8 ± 0.7 mg/L), nitrate (0.12 ± 0.04 mg/L) and biochemical oxygen demand (0.36 ± 0.08 mg/L). Generally, iron and pH values fell short of regulatory standards while pH represented the most significantly varying parameter (p < 0.05) across all locations owing to human influences and dilution effects across the watercourse. Also, conductivity and dissolved solids depicted the strongest inter-parameter association. Overall, the downstream section of river revealed the poorest water quality condition while the entire river stretch was classified as being unsuitable for drinking even though it can support aquatic life.