The recharge zone of an aquifer supplying the Tursko well-field (Poland), located in an area of sparse water resources, shows groundwater contamination manifested by high nitrate concentrations and pharmaceutical compounds. This study documents the steady deterioration of groundwater chemistry during one decade of groundwater exploitation, and analyses wastewater impact on the groundwater chemistry using pharmaceutical compounds as anthropogenic tracers, with focus on the influence of treated wastewater and drainage water. These waters infiltrate into groundwater from a drainage ditch located in the water supply aquifer’s recharge zone. It is shown that strongly contaminated water can deliver organic matter and nutrients to the groundwater, activating or intensiying denitrification. As a result, the nitrate concentration has decreased in the groundwater, while concentrations of denitrification products have increased. Associated process of oxidation of organic matter causes periodic exceeding of limits allowed for drinking water. The ability of pharmaceutical compounds to act as anthropogenic tracers shows that infiltration of wastewater is a significant factor influencing drinking groundwater quality

中文翻译：

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在十年的水资源开发过程中，经过处理的废水排放对供水含水层污染的影响（波兰 Tursko 井场）

为 Tursko 井场（波兰）供水的含水层补给区位于水资源稀缺的地区，显示地下水污染，表现为高浓度硝酸盐和药物化合物。本研究记录了在地下水开采十年期间地下水化学的持续恶化，并使用药物化合物作为人为示踪剂分析废水对地下水化学的影响，重点关注处理后的废水和排水的影响。这些水从位于供水含水层补给区的排水沟渗入地下水。结果表明，严重污染的水可以将有机物和营养物质输送到地下水中，从而激活或加强反硝化作用。因此，地下水中的硝酸盐浓度降低了，而反硝化产物的浓度却增加了。有机物氧化的相关过程会导致定期超过饮用水允许的限度。药物化合物作为人为示踪剂的能力表明，废水的渗透是影响饮用水地下水质量的重要因素