Occurrence and potential human-health relevance of volatile organic compounds in drinking water from domestic wells in the United States.
Occurrence and potential human-health relevance of volatile organic compounds in drinking water from domestic wells in the United States.
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DOI：
10.1289/ehp.10253
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发表时间：
2007-11
影响因子：
10.4
通讯作者：
Price CV
中科院分区：
文献类型：
--
作者：
Rowe BL;Toccalino PL;Moran MJ;Zogorski JS;Price CV
随着人口的增加和对安全饮用水需求的增加，对水质和污染物的监测变得越来越重要。2006年，美国地质调查局的一项全国评估报告称，在1985年至2002年期间，根据2401口国内油井的采样，发现了55种挥发性有机化合物（VOCs）。我们检查了单个和多种挥发性有机化合物的发生情况，并评估了挥发性有机化合物浓度与人类健康的潜在相关性。我们还确定了影响挥发性有机化合物发生概率的水文地质和人为变量。污水处理前在井口采集生活井样，对55种VOCs进行分析。结果用于检验挥发性有机化合物的发生，并使用逻辑回归分析确定多个解释变量的关联。我们使用筛选水平评估来比较VOC浓度与美国环境保护署最大污染物水平（MCLs）和基于健康的筛选水平。我们在65%的样品中检测到挥发性有机化合物；大约一半的样本含有挥发性有机化合物混合物。经常检测到的挥发性有机化合物包括氯仿、甲苯、1,2,4-三甲苯和过氯乙烯。VOC浓度普遍< 1 μg/L。1.2%的样品中有一种或多种VOC浓度高于mcl，包括二溴氯丙烷、1,2-二氯丙烷和二溴乙烯（熏蒸剂）；四氯乙烯和三氯乙烯（溶剂）；和1,1-二氯乙烯（有机合成化合物）。家庭水井供应的饮用水容易受到低水平VOC污染。约1%的样本浓度可能对人体健康构成威胁。确定与挥发性有机化合物发生有关的因素可能有助于了解地下水中挥发性有机化合物的来源、运输和命运。
As the population and demand for safe drinking water from domestic wells increase, it is important to examine water quality and contaminant occurrence. A national assessment in 2006 by the U.S. Geological Survey reported findings for 55 volatile organic compounds (VOCs) based on 2,401 domestic wells sampled during 1985–2002. We examined the occurrence of individual and multiple VOCs and assessed the potential human-health relevance of VOC concentrations. We also identified hydrogeologic and anthropogenic variables that influence the probability of VOC occurrence. The domestic well samples were collected at the wellhead before treatment of water and analyzed for 55 VOCs. Results were used to examine VOC occurrence and identify associations of multiple explanatory variables using logistic regression analyses. We used a screening-level assessment to compare VOC concentrations to U.S. Environmental Protection Agency maximum contaminant levels (MCLs) and health-based screening levels. We detected VOCs in 65% of the samples; about one-half of these samples contained VOC mixtures. Frequently detected VOCs included chloroform, toluene, 1,2,4-trimethylbenzene, and perchloroethene. VOC concentrations generally were < 1 μg/L. One or more VOC concentrations were greater than MCLs in 1.2% of samples, including dibromochloropropane, 1,2-dichloropropane, and ethylene dibromide (fumigants); perchloroethene and trichloroethene (solvents); and 1,1-dichloroethene (organic synthesis compound). Drinking water supplied by domestic wells is vulnerable to low-level VOC contamination. About 1% of samples had concentrations of potential human-health concern. Identifying factors associated with VOC occurrence may aid in understanding the sources, transport, and fate of VOCs in groundwater.
影响因子：
11.4
作者：
Squillace, PJ;Moran, MJ;Zogorski, JS
通讯作者：
Zogorski, JS
化学混合物：考虑毒理学和化学评估的演变。
影响因子：
10.4
作者：
Monosson, Emily
通讯作者：
Monosson, Emily
影响因子：
3.8
作者：
Toccalino, Patricia L.;Norman, Julia E.
通讯作者：
Norman, Julia E.