Freshwater is a natural asset that must be protected to ensure its quality and essential ecosystem services it provides. Providing safe and adequate drinking water is an essential to human life. The aim of this study is to assess the physico-chemical quality of water stored in plastic tanks for drinking purposes in Umaru Musa Yar’adua University Katsina. Four plastic water tanks were selected (MGT, FHT, MHT and FST) for water sampling. The concentration of pH, electrical conductivity (EC), total dissolved solids (TDS), total suspended solids (TSS), dissolved oxygen (DO), biological oxygen demand (BOD), chemical oxygen demand (COD), total alkalinity (TA), chloride (Cl), turbidity, total hardness (TH), sulfate (SO4), phosphate (PO4), and nitrate (NO2) were analyzed and compared with permissible limits set by Nigerian Standards for Drinking Water Quality (2007) and World Health Organization (2017). From the result, the concentrations of DO, BOD and COD were found higher than their respective permissible limits, while pH, EC, TDS, TSS, TA, Cl¯, turbidity, TH, SO4, PO4, NO2 concentrations were observed within the limits. Based on Water Quality Index (WQI) assessment, result obtained revealed that, the status of stored water of all samples was excellent indicating no health risk to consumers and suggested that the water is of good quality. It is concluded that, stored water in plastic tanks is suitable for drinking and other purposes. Constant monitoring of these water stored in plastic tanks is recommended as well as research to investigate the bacteriological parameters.