在明尼苏达州 (美国) 的源泉和成品饮用水中的新出现的污染物和潜在的健康影响
Sarah M Elliott1, Aliesha L Krall1, Jane R de Lambert2
1U.S. Geological Survey, 2280 Woodale Drive, Mounds View, MN 55112, USA.
概括
在明尼苏达州发现了杀虫剂和PFAS等不受管制的污染物.
科学领域:
- 环境科学 环境科学
- 公共卫生 公共卫生
- 分析化学 分析化学
背景情况:
- 关于饮用水源中未受监管污染物的数据有限.
- 社区的水系统面临着各种各样的人为影响.
- 了解污染物存在对于保护公共健康至关重要.
研究的目的:
- 评估明尼苏达州饮用水中未受监管污染物的发生和度.
- 为了比较源水中的污染物水平与成品饮用水.
- 评估与检测到的污染物相关的潜在人类健康风险.
主要方法:
- 来自明尼苏达州98个社区水系统的源泉和成品饮用水样本.
- 分析了农药,药品,和多基基物质 (PFAS),三醇,荷尔蒙,废水指标和非法药物.
- 根据水源和人为影响,将系统分组成网络.
- 将检测到的度与美国EPA ToxCast数据库和州指导值进行比较.
主要成果:
- 在0到35个样本中检测到的污染物,其度从0.38 ng/L到47,500 ng/L不等.
- 与源水相比,在成品水中发现的污染物和度较少.
- 易受伤害的水井显示PFAS和农药含量以及总度显著上升.
结论:
- 完成的饮用水通常含有比源水更低的污染物.
- 脆弱的水源带来了更高的污染风险.
- 在成品水中检测到的污染物度低于对潜在健康风险的查值.
- 研究结果为明尼苏达州饮用水保护计划的改进提供了信息.
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