The present investigation deals with the health risk assessment due to the heavy metals (Cd, Cr, Cu, Co, Mn, Pb, Ni, and Zn) in groundwater in the industrial township of Virudhunagar district. Twenty groundwater samples were collected, and the measured concentration of the heavy metals follows the order Pb > Ni > Zn > Co > Cr > Cd > Cu > Mn. The metal pollution indices (heavy metal evaluation index, Heavy metal pollution index, degree of contamination) were calculated using the measured heavy metal concentrations. The samples collected nearer to the industrial zone have elevated concentrations of Pb, Cd, and Ni. The carcinogenic and noncarcinogenic risks were calculated based on the measured heavy metals concentration and average daily intake of water. The calculated carcinogenic risk values (5.66 × 10⁻³–1.56 × 10⁻²) (Pb, Cd, and Ni) exceed the acceptable limit of 10⁻⁶–10⁻⁴. The noncarcinogenic risk exceeds the acceptable limit of one for the heavy metals Pb and Cr. The higher carcinogenic and noncarcinogenic risk values reveal that the study area has health risks due to Pb, Cd, Ni, and Cr metals. Furthermore, factor analysis and cluster analysis showed that the industrial impact and wastage dumpsites are the prime sources for heavy metal contamination in groundwater of the study area.

本调查研究了维鲁德纳格地区工业城镇地下水中重金属（镉，铬，铜，钴，锰，铅，镍和锌）的健康风险评估。收集了20个地下水样品，重金属的测量浓度依次为Pb> Ni> Zn> Co> Cr> Cd> Cu> Mn。使用测得的重金属浓度计算金属污染指数（重金属评估指数，重金属污染指数，污染程度）。靠近工业区收集的样品中Pb，Cd和Ni的浓度较高。根据测得的重金属浓度和平均每日饮水量计算出致癌和非致癌风险。计算的致癌风险值（5.66×10 ^-3–1.56×10 ^-2）（Pb，Cd和Ni）超过了10 ^-6 –10 ^-4的可接受极限。重金属Pb和Cr的非致癌风险超过了可接受的极限。较高的致癌和非致癌风险值表明，研究区存在铅，镉，镍和铬金属对健康的危害。此外，因子分析和聚类分析表明，工业影响和垃圾场是研究区域地下水重金属污染的主要来源。