The quality and potability of waters of the Tyśmienica River Basin were determined in 2017 at eight measuring stations. The paper presents analyses of the physical and chemical parameters of surface waters of the basin. With regard to suspended solids, pH value, electric conductivity, sulphates, ammonia, chlorides and phosphate, the water was classified as having a very good ecological status. In the case of Kjeldahl nitrogen, the waters were classified as having a good ecological status. In the case of the remaining parameters, i.e. BOD, DO, TOC and COD, the status varied among stations. The values of all the physical and chemical parameters complied with the values for undisturbed conditions. Only ammonia and COD showed significant differences among stations. The WPI values for each measuring point ranged from 0.90 to 1.56, what corresponds to the descriptive indicators of moderately polluted water. The high concentrations of COD and TOC indicate that high-performance treatment processes (category A3) must be used to ensure that the water is suitable for drinking.

2017年，在八个测量站确定了蒂希米尼察河流域水的质量和可饮用性。本文对流域地表水的理化参数进行了分析。关于悬浮固体，pH值，电导率，硫酸盐，氨，氯化物和磷酸盐，水被归类为具有良好的生态状态。就凯氏定氮而言，这些水被归类为具有良好的生态状况。在其余参数（例如BOD，DO，TOC和COD）的情况下，站之间的状态有所不同。所有物理和化学参数的值均与不受干扰条件下的值一致。各站之间只有氨和COD表现出显着差异。每个测量点的WPI值在0.90至1.56之间，与中度污染水的描述性指标相对应。高浓度的COD和TOC表示必须使用高性能处理工艺（A3类）来确保水适合饮用。