Physical, chemical, and biological properties are criteria for evaluating water quality. Human and other activities often compromise water quality, making the source of life itself a threat to life. The current study aimed to apply the Canadian Water Quality Index (CCME WQI) model to groundwater in the district of Hamdaniya to determine the suitability of the water for drinking purposes. Thus, six wells at various sites were randomly selected for water sampling. The samples collected were subject to a comprehensive physical and chemical analysis. To calculate the WQI, 21 parameters were adopted: (turbidity, pH, dissolved oxygen (DO), biochemical oxygen demand (BOD₅), total dissolved solids (TDS), total hardness (TH), electrical conductivity (EC), alkaline (ALK), nitrate (NO₃), phosphate (PO₄), calcium hardness (Ca), magnesium hardness (Mg), sulfate (SO₄), potassium (K), sodium (Na), chlorides (Cl) , cadmium (Cd), Iron (Fe), nickel (Ni), copper(Cu)and zinc (Zn). For the groundwater of the wells at sites under study, the values recorded of WQI ranged from 44.17 to 31.10 for sites 1 & 6, respectively. This indicates that the wells' water under study is unsuitable for drinking.