This study investigates the suitability of statistical techniques for evaluating the fluoride content and the groundwater quality from Robles Department (RD) and Banda Department (BD) in Santiago del Estero (Argentina). For the original statistical study, evaluation of nine parameters (fluoride, pH, conductivity, atmospheric and water temperature, total dissolved solids, chloride, hardness, and alkalinity) of 110 collected underground water samples from 23 dispersed rural areas was proposed. Groundwater samples were obtained by sampling taken from wells at different depths. Fluoride levels were determined by a standard colorimetric method in two seasonal periods, the dry (from April to September) and rainy (from October to March) period. The analytical results obtained for physicochemical parameters such as pH, total dissolved solids (TDS), and temperature does not reveal any notable difference between the rainy and dry seasons studied. In both seasons, the atmospheric temperature average was 22 °C. With respect to fluoride content, approximately 50% of the analysed groundwater samples exceeded the limit established by current legislation (1.0 mg/L), obtaining concentration levels in the range of 0.01–2.80 mg/L. This study demonstrates the usefulness of the univariate statistical method (quartiles calculation, interquartile range IQR), multivariate principal component analysis (PCA), and cluster analysis to establish a better understanding of the state of the contamination of the waters in the region studied.

这项研究调查了统计技术的适用性，这些技术用于评估阿根廷德尔埃斯特罗（阿根廷）罗伯斯省（RD）和班达省（BD）的氟化物含量和地下水质量。对于最初的统计研究，建议评估23个分散的农村地区收集的110个地下水样品的9个参数（氟化物，pH，电导率，大气和水温，总溶解固体，氯化物，硬度和碱度）。地下水样品是通过从不同深度的井中取样而获得的。通过标准比色法在两个季节（干燥期（从4月至9月）和雨季（从10月至3月））确定氟化物含量。针对理化参数（例如pH值，总溶解固体（TDS），并且温度没有显示出所研究的雨季和旱季之间有任何显着差异。在两个季节中，平均气温为22°C。关于氟化物含量，大约50％的分析地下水样品超过了现行法规规定的限值（1.0 mg / L），浓度范围为0.01–2.80 mg / L。这项研究证明了单变量统计方法（四分位数计算，四分位数间距IQR），多变量主成分分析（PCA）和聚类分析的用处，以便更好地了解所研究区域的水污染状况。关于氟化物含量，大约50％的分析地下水样品超过了现行法规规定的限值（1.0 mg / L），浓度范围为0.01–2.80 mg / L。这项研究证明了单变量统计方法（四分位数计算，四分位数间距IQR），多变量主成分分析（PCA）和聚类分析的作用，可以更好地了解所研究区域的水污染状况。关于氟化物含量，大约50％的分析地下水样品超过了现行法规规定的限值（1.0 mg / L），浓度范围为0.01–2.80 mg / L。这项研究证明了单变量统计方法（四分位数计算，四分位数间距IQR），多变量主成分分析（PCA）和聚类分析的作用，可以更好地了解所研究区域的水污染状况。