Groundwater constitutes one of the paramount natural resources, playing a critical role in human health and overall well-being, as well as in sustainable development. An essential aspect to consider is that Libya exhibits a considerable reliance on groundwater, which constitutes over 97% of the total water utilized. Furthermore, this resource is employed across a diverse array of domestic, industrial, and agricultural activities. The current study seeks to assess the chemical constituents of groundwater and their interrelationships with five examined parameters, namely water level, elevation above sea level, productivity in cubic meters per hour, age, and depth. Additionally, the pollution index (Pi) was computed as part of the analysis. Groundwater samples were collected in one-liter plastic containers, which had been meticulously rinsed with tap water followed by a rinse with distilled water. The laboratory specimens were subsequently transported to the laboratory in insulated iceboxes and maintained at 4°C until analysis could be conducted. An evaluation of the chemical constituents in groundwater designated for drinking and irrigation purposes in the Aljeffara western plain, located 80 kilometers west of Tripoli, was conducted. Samples were procured from 62 wells that provide drinking and irrigation water to the local population. The physical and chemical properties were analyzed across 19 parameters: Na⁺, K⁺, Cl⁻, HCO₃⁻, NO₂⁻, NO₃⁻, NH₄⁺, SO₄²⁻, Ca²⁺, Mg²⁺, temperature (°C), pH, total dissolved solids (TDS), electrical conductivity (EC), total hardness (TH), alkalinity, CO₂, PO₄³⁻, and turbidity. The findings indicated that six of the examined parameters exhibited negative correlation coefficients with depth (HCO₃, NO₃⁻, temperature (°C), alkalinity, and PO₄²⁺). Conversely, five parameters demonstrated positive correlation coefficients with well age (HCO₃, NO₃⁻, temperature (°C), pH, and alkalinity). Moreover, nine parameters showed a positive correlation coefficient with well productivity in cubic meters per hour (HCO₃, NO₃⁻, NH₄⁺, SO4--, temperature (°C), pH, EC, alkalinity, and PO₄²⁺). Five parameters were positively correlated with the elevation of the well above sea level (NH₄⁺, Ca²⁺, Mg²⁺, pH, CO₂, and turbidity). Additionally, three parameters displayed positive correlation coefficients with the water level (NO₃⁻), temperature (°C), and pH. The parameters pH, HCO₃⁻, NO₃⁻, and NH₄⁺ exhibited an acceptable pollution index (Pi), with respective Pi values of 0.987, 0.612, 0.209, 0.0502, and 0.755. In contrast, the Pi value for total hardness (CaCO₃) was deemed extremely unacceptable, recording a value of 37.83, while total dissolved solids (TDS) were associated with a significantly high Pi value of 7.448.        An evaluation of the chemical constituents in groundwater designated for drinking and irrigation purposes in the Aljeffara western plain, located 80 kilometers west of Tripoli, was conducted. Samples were procured from 62 wells that provide drinking and irrigation water to the local population. The physical and chemical properties were analyzed across 19 parameters: Na⁺, K⁺, Cl⁻, HCO₃⁻, NO₂⁻, NO₃⁻, NH₄⁺, SO₄²⁻, Ca²⁺, Mg²⁺, temperature (°C), pH, total dissolved solids (TDS), electrical conductivity (EC), total hardness (TH), alkalinity, CO₂, PO₄³⁻, and turbidity. The findings indicated that six of the examined parameters exhibited negative correlation coefficients with depth (HCO₃, NO₃⁻, temperature (°C), alkalinity, and PO₄²⁺). Conversely, five parameters demonstrated positive correlation coefficients with well age (HCO₃, NO₃⁻, temperature (°C), pH, and alkalinity). Moreover, nine parameters showed a positive correlation coefficient with well productivity in cubic meters per hour (HCO₃, NO₃⁻, NH₄⁺, SO4--, temperature (°C), pH, EC, alkalinity, and PO₄²⁺). Five parameters were positively correlated with the elevation of the well above sea level (NH₄⁺, Ca²⁺, Mg²⁺, pH, CO₂, and turbidity). Additionally, three parameters displayed positive correlation coefficients with the water level (NO₃⁻), temperature (°C), and pH. The parameters pH, HCO₃⁻, NO₃⁻, and NH₄⁺ exhibited an acceptable pollution index (Pi), with respective Pi values of 0.987, 0.612, 0.209, 0.0502, and 0.755. In contrast, the Pi value for total hardness (CaCO₃) was deemed extremely unacceptable, recording a value of 37.83, while total dissolved solids (TDS) were associated with a significantly high Pi value of 7.448.