Sixty percent of global agricultural production depends on the use of pesticides, despite their adverse effects on human health and the ecosystem. In Mexico, the application of these products has been exacerbated, including pesticides already banned in other countries. The objective of this study was to determine pesticide concentrations in samples of water purification plants and surface water from the Cienega area of Jalisco, Mexico. A survey of 119 farmers with occupational exposure to pesticides was carried out in order to obtain information on the most frequently used pesticides. Subsequently, 51 samples taken at 7 different sites were analyzed using liquid chromatography and mass-mass spectrometry. The most frequently used pesticides were organophosphates (28.87%), pyrethroids (12.89%), and the herbicide paraquat (31.95%). In surface water, the prevalent pesticides were glyphosate (56.96–510.46 ppb) and malathion (311.76–863.49 ppb). Glyphosate levels were higher than the limits acceptable in daily water intake in Cumuato. Malathion levels exceeded the limits permissible by EPA in water purification plants in urban public establishments (100 ppb for children, and 200 ppb for adults). In addition, a multidimensional scaling analysis showed that the sampled sites could be grouped into 2 different bodies of water, based on similarities in their glyphosate concentrations (stress = 0.005), while the concentrations of malathion were heterogeneous (stress = 0.001).

尽管农药对人类健康和生态系统造成不利影响，但全球农业产量的60％仍取决于农药的使用。在墨西哥，这些产品的应用加剧了，包括其他国家已经禁止使用的农药。这项研究的目的是确定墨西哥哈利斯科州Cienega地区净水厂和地表水样品中的农药浓度。对119名职业性接触农药的农民进行了调查，以获取有关最常用农药的信息。随后，使用液相色谱和质谱分析了在7个不同位置采集的51个样品。最常用的农药是有机磷酸盐（28.87％），拟除虫菊酯（12.89％）和除草剂百草枯（31.95％）。在地表水中 常见的农药为草甘膦（56.96–510.46 ppb）和马拉硫磷（311.76–863.49 ppb）。草甘膦水平高于Cumuato每日饮水量可接受的水平。马拉硫磷水平超过了城市公共场所净水厂所允许的EPA限制（儿童100 ppb，成人200 ppb）。此外，多维尺度分析表明，根据草甘膦浓度（应力= 0.005）的相似性，而马拉硫磷的浓度是异质性（应力= 0.001），可以将采样地点分为2个不同的水体。马拉硫磷水平超过了城市公共场所净水厂所允许的EPA限制（儿童100 ppb，成人200 ppb）。此外，多维尺度分析表明，根据草甘膦浓度（应力= 0.005）的相似性，而马拉硫磷的浓度是异质性（应力= 0.001），可以将采样地点分为2个不同的水体。马拉硫磷水平超过了城市公共场所净水厂所允许的EPA限制（儿童100 ppb，成人200 ppb）。此外，多维尺度分析表明，根据草甘膦浓度（应力= 0.005）的相似性，而马拉硫磷的浓度是异质性（应力= 0.001），可以将采样地点分为2个不同的水体。