Water is principally intended for direct consumption and for the production of food and beverages. It is also a valuable raw material in the industry. Despite the use of multi-stage treatment processes, the quality of drinking water may still be a concern in some countries due to the presence of toxic pollutants, often challenging to remove through the conventional treatment process. The presence of even trace amounts of organochlorine pesticides in drinking water is dangerous due to their ability to accumulate in the human body and their effects, especially their capacity for endocrine disruption. The present study aimed to assess the effect of water and sewage treatment on the efficiency of reducing residues of selected organochlorine pesticides in drinking water and treated sewage. It was found that the water treatment process reduced concentrations of these compounds by an average of 80% (46–100%) and that the levels of organochlorine pesticides in the drinking water were no higher than 0.55% the maximum residue limit (MRL). The sewage treatment process led to a reduction in organochlorine pesticide concentration of 37–100%, averaging 85%, and the sums of organochlorine pesticide residues in treated sewage ranged between 0.02 and 14.97 ng/L in annual terms.

水主要用于直接消费以及用于生产食品和饮料。它也是工业上有价值的原材料。尽管使用了多级处理过程，但由于有毒污染物的存在，饮用水的质量在一些国家仍然是一个问题，通过传统的处理过程通常难以去除。饮用水中即使存在微量的有机氯杀虫剂也是危险的，因为它们能够在人体内积累并产生影响，尤其是干扰内分泌的能力。本研究旨在评估水和污水处理对减少饮用水和处理过的污水中特定有机氯农药残留效率的影响。结果表明，水处理过程将这些化合物的浓度平均降低了 80%（46-100%），并且饮用水中有机氯农药的含量不高于最大残留限量 (MRL) 的 0.55%。污水处理工艺使有机氯农药浓度降低了 37-100%，平均为 85%，处理后的污水中有机氯农药残留总量在 0.02-14.97 ng/L 之间。