Assessing the groundwater quality is important for the efficient exploitation of water resources in semi-arid areas. The study area in northeast Algeria mostly depends on groundwater as its main source of water, and the quality of groundwater is becoming important due to the increasing need for freshwater. The hydrochemical characteristics and water quality of groundwater in the Tebessa-Ain Chabro were assessed using water quality indices, geochemical modeling, and multivariate statistical approaches. The study discovered that the groundwater samples could be classified into four distinct water groups using hierarchical cluster analysis in Q mode (HCA) based on their electrical conductivity. We identified three forms of water: mixed (Ca²⁺–Mg²⁺–Cl⁻), Na⁺–K⁺–HCO₃⁻, and Ca²⁺–Cl⁻. According to the water quality assessment, only 38% of the samples were deemed suitable for human consumption, while 34% were categorized as poor water, 10% as extremely poor, and 17% as unsafe for drinking. The irrigation water quality index identified four classifications: low, moderate, high, and severe restriction, with corresponding percentages of 31%, 31%, 7%, and 31%. The nitrate pollution index (NPI) showed that 48% of samples fell into the moderate pollution class. Human activity, such as sewage infiltration and waste disposal in open areas, was the cause of this nitrate contamination. The saturation index values showed that groundwater was less saturated in halite and sylvite and more saturated in aragonite, calcite, dolomite, anhydrite, gypsum, and hydroxyapatite. The Tebessa region’s groundwater’s hydrochemical properties and water quality have been assessed using multivariate statistical techniques, geochemical modeling, and water quality indexes. The study’s conclusions can provide a foundation for upcoming research evaluating the region’s groundwater quality.

评价地下水质量对于半干旱地区水资源的有效利用具有重要意义。阿尔及利亚东北部的研究区主要依靠地下水作为主要水源，由于对淡水的需求不断增加，地下水的质量变得越来越重要。使用水质指数、地球化学模型和多元统计方法评估了泰贝萨-艾因查布罗地下水的水化学特征和水质。研究发现，根据地下水样本的电导率，使用 Q 模式 (HCA) 层次聚类分析可以将地下水样本分为四个不同的水组。我们确定了三种形式的水：混合水（Ca ²⁺ –Mg ²⁺ –Cl ⁻ ）、Na ⁺ –K ⁺ –HCO ₃ ⁻和 Ca ²⁺ –Cl ⁻ 。根据水质评估，只有38%的样本被认为适合人类饮用，而34%的样本被列为劣质水，10%的样本为极差，17%的样本为不安全饮用。灌溉水质指数分为低、中、高、重度四级，相应比例分别为31%、31%、7%和31%。硝酸盐污染指数（NPI）显示，48%的样品属于中度污染等级。人类活动，例如污水渗透和露天废物处理，是造成硝酸盐污染的原因。饱和指数值表明，地下水中石盐和钾盐的饱和度较低，文石、方解石、白云石、硬石膏、石膏和羟基磷灰石的饱和度较高。 使用多元统计技术、地球化学模型和水质指数对泰贝萨地区地下水的水化学性质和水质进行了评估。该研究的结论可以为即将开展的评估该地区地下水质量的研究奠定基础。