1992年5月至1994年3月，内布拉斯加州尼克森附近的枫树溪和内布拉斯加州路易斯维尔的普拉特河记录了46种农药的浓度分布。作为公共供水的来源，林肯和奥马哈西部从普拉特河附近的邻近冲积层中抽取地下水，该冲积层通过水力与普拉特河相连。有机氮除草剂在每个地点的农药分布中占主导地位。这两个地点农药分布的差异部分反映了土地利用和土地管理做法的差异。在城市地区使用的杀虫剂二嗪农，通常在普拉特河现场检测到，但在枫树溪现场未检测到。在普拉特河现场分析的46种农药中，除草剂阿特拉津和甲草胺更有可能超过各自的最高污染物水平3。 0和2.0微克/升；氰嗪更有可能超过1.0 ug/L的健康建议水平。包括33篇参考文献、表格和图表。

Distributions of concentrations of 46 pesticides were documented from May 1992 through March 1994 for Maple Creek near Nickerson, Nebraska, and Platte River at Louisville, Nebraska. As their source of public water supplies, Lincoln and the western part of Omaha withdraw groundwater from the adjacent alluvium near the Platte River site, which is hydraulically connected to the Platte River. Organonitrogen herbicides dominated the pesticide distributions at each site. Variations in the distributions of pesticides at the two sites partly reflect differences in land use and land management practices. Diazinon, an insecticide used in urban areas, was commonly detected at the Platte River site but not at the Maple Creek site. Of the 46 pesticides analyzed at the Platte River site, the herbicides atrazine and alachlor were more likely to exceed their respective maximum contaminant levels of 3.0 and 2.0 ug/L; cyanazine was more likely to exceed the health advisory level of 1.0 ug/L. Includes 33 references, table, figures.