在PFAS影响的地下水社区中,自来水暴露,住宅风险和缓解
Paul M Bradley1, Kristin M Romanok2, Kelly L Smalling2
1U.S. Geological Survey, Columbia, South Carolina, USA. pbradley@usgs.gov.
Environmental science. Processes & impacts
|April 14, 2025
概括
/多醇基物质 (PFAS) 和其他污染物对私人井水构成风险. 砂岩水库提供了一个更安全的替代饮用水源,没有PFAS污染.
科学领域:
- 环境科学 环境科学
- 公共卫生 公共卫生
- 水文地质学 水文地质学
背景情况:
- 透/多醇基物质 (PFAS) 是一个日益严重的公共卫生问题,由于广泛的自来水 (TW) 暴露.
- 历史上农村,拥有私人井的城市化社区面临着未被认可的TW污染的高风险.
- 监测有限,污染源不断增加,增加了这些地区的风险.
研究的目的:
- 在一个脆弱的社区评估已知的PFAS问题以外的TW风险.
- 评估TW的短期和长期风险变化.
- 确定砂岩含水层作为替代TW来源的适用性,以减轻PFAS暴露.
主要方法:
- 在2021年进行了广泛的TW评估,分析了510种有机物,34种无机物和3种微生物群.
- 从11个住宅和社区地点收集样本.
- 使用基于基准的累积毒性系数 (TQ) 探索人类健康风险,并在三年内在砂岩含水层样本中分析PFAS.
主要成果:
- 检测到76种有机和25种无机污染物在水源来源的TW中.
- 在所有流水层样本中观察到污染物对人类健康的高风险 (TQ ≥ 1).
- 在砂岩水表来源的样本中没有发现PFAS检测,这表明没有PFAS相关的风险.
结论:
- 含有性水源的TW存在已知 (PFAS) 和其他未被识别的污染物的风险.
- 砂岩含水层是一个可行的替代来源,没有PFAS污染.
- 除了已知的污染物之外,扩大私人井水监测对于公共卫生保护至关重要.
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