Contaminant Data from a Survey of Minnesota Source and Finished Drinking Waters, 2019-2022

The U.S. Geological Survey, in cooperation with the Minnesota Department of Health, conducted a study to determine the occurrence of unregulated contaminants in source and finished drinking waters throughout Minnesota. Minnesota relies on both groundwater and surface water sources for drinking water, which may be vulnerable to influences such as wastewater discharge and/or agricultural activities. Thus, drinking water facilities apply some form of treatment to source waters prior to distribution. Although drinking water treatment is mostly focused on satisfying regulatory requirements, it may provide secondary benefits for removal of unregulated contaminants. In 2019, 2021, and 2022, paired source and finished drinking water was collected from 100 facilities and characterized for select organic contaminants. Samples were analyzed for some combination of alkylphenols, benzotriazoles/benzothiazoles, hormones, illicit drugs, personal care products, pesticides, per- and polyfluoroalkyl substances, pharmaceuticals, plasticizers, and wastewater indicators, depending on potential influences from the watershed.

美国地质调查局（U.S. Geological Survey）与明尼苏达州卫生部（Minnesota Department of Health）合作开展了一项研究，旨在探明明尼苏达州全域范围内饮用水源水与成品饮用水中未受监管污染物的检出情况。明尼苏达州的饮用水同时依赖地下水与地表水水源，此类水源易受到废水排放及/或农业活动等因素的影响。因此，各饮用水处理设施会在配水前对源水施加相应处理工艺。尽管饮用水处理的核心目标多为满足监管要求，但该过程亦可附带实现未受监管污染物的去除。2019年、2021年及2022年，研究团队从100家饮用水设施采集了成对的源水与成品饮用水样本，并针对选定的有机污染物开展了表征分析。根据流域潜在影响因素的不同，样本的检测项目涵盖了烷基酚类、苯并三唑类/苯并噻唑类、激素类物质、违禁药品、个人护理产品、农药类、全氟和多氟烷基物质（per- and polyfluoroalkyl substances）、医药品、增塑剂以及废水指示物等组合检测指标。