Successful cultivation of S. tuberosum L. plants require appropriate irrigation management practices and water quality assessment. This study investigates irrigation water quality parameters in two S. tuberosum L. cultivation fields (A and B), aiming to optimize water uses for sustainable production, knowing that potato is an irrigation dependent crop. A comparative analysis approach was performed, using tools such as Piper and Wilcox classification diagram with sodium adsorption ratio (SAR) index, in order to assess irrigation water quality. Key parameters were analyzed, including pH, electrical conductivity and several ion concentrations (calcium, potassium, magnesium, sodium, sulfate, bicarbonate, and chloride), which impact potato crop development and productivity. Results revealed slight variations in water quality irrigation between fields, which may affect soil preservation management strategies in the future. Irrigation water from both fields showed different hydrochemical facies: calcium bicarbonate for field A and calcium sulfate bicarbonate for field B. Data indicated the importance to monitoring salinity in field B due to the high water conductivity (1495 µS cm−1). SAR index of field B (2.53) indicates a greater potential for sodium accumulation in the soil, potentially causing soil sodification due to a high proportion of sodium concentration (138.9 mg L−1) compared to those of calcium (178.2 mg L−1) and magnesium (30.2 mg L−1). Field A showed a lower SAR index (0.71), indicating a relatively low proportion of sodium (38.7 mg L−1) compared to calcium (176.6 mg L−1) and magnesium (14.5 mg L−1). This lower potential for sodium accumulation can be beneficial for soil structure and plant growth. The integrated approach provides important data to decision-making about water and soil use based on physical and chemical parameters of the irrigation water.