In order to assess the quality of groundwater near ash pond of Parichha Thermal Power Plant (Jhansi), heavy metal evaluation index (HEI)was calculated. An unlined ash pond is being used for a long time to dispose fly ash generated by thermal power plant. To assess the level of groundwater contamination due to ash slurry disposal, both groundwater and ash slurry samples were collected and analysed in terms of their chemical concentration. In the present study, it was observed that significant amount of trace elements can leach out from ash slurry and may contaminate groundwater due to downward percolation through soil strata in an unlined ash pond. Obtained results revealed the range of heavy metals concentration in groundwater as [Ni (0.02–0.07 mg/l), Pb (0.14–0.41 mg/l), Fe (0.20–7.21 mg/l), Mn (0.01–0.14 mg/l), Cr (0.03–0.05 mg/l) and Al (0.05–0.26 mg /l)]. HEI showed a heavy load of metal pollution within the range of 5 km from the ash pond while moderate pollution within the range of 7 km and very low at a distance of 15 km.

为了评估帕里奇哈热电厂（占西）灰池附近的地下水质量，计算了重金属评估指数（HEI）。长期以来，无衬砌的烟灰池被用来处理火力发电厂产生的粉煤灰。为了评估由于处理灰浆而引起的地下水污染水平，收集了地下水和灰浆样品，并根据其化学浓度进行了分析。在本研究中，观察到大量的微量元素会从灰浆中浸出，并可能由于未衬砌的灰池中土壤层的向下渗透而污染地下水。获得的结果表明，地下水中重金属的浓度范围为[Ni（0.02–0.07 mg / l），Pb（0.14–0.41 mg / l），Fe（0.20–7.21 mg / l），Mn（0.01–0.14 mg / l） l），Cr（0.03-0.05 mg / l）和Al（0.05-0。26 mg / l）]。HEI在距灰池5 km的范围内显示出重金属污染，而在7 km的范围内则有中等污染，而在15 km的范围内非常低。