挥发性有机化合物（VOCs）产生量大，并与 各种产品，如塑料、粘合剂、油漆、汽油、熏蒸剂、制冷剂和干洗 流体。挥发性有机化合物的广泛和长期使用及其持久和迁移能力 地下水污染引发了对环境可能产生的不利影响的问题，包括 饮用水质量。国家水质评估项目的长期调查 美国地质调查局提供了最全面的全国性分析 地下水中挥发性有机化合物的出现日期，基于1985年至2005年之间的采样结果 2002年。主要发现之一是，在全球大部分含水层中都检测到了挥发性有机化合物 而且不局限于几个特定的含水层或地区。没有检测到挥发性有机化合物， 然而，在近3500口取样井中的许多井中；例如，大约80%的人没有怀孕 检测值高于阈值0。 十亿分之二。最常检测到的挥发性有机化合物是 氯仿、溶剂四氯乙烯和三氯乙烯，以及汽油中的氧化甲基 叔丁基醚；评估中包括的55种化合物中，有13种根本没有检测到。A. 对饮用水源井中未经处理的地下水样本的单独分析显示: 在国内油井样本（14%）和公共油井样本（26%）中检测到挥发性有机化合物 百分比）。来自家庭和公共水井的地下水样本中，只有不到3%被污染 浓度高于联邦饮用水标准。包括3个参考文献，表1。

Volatile organic compounds (VOCs) are produced in large volumes and are associated with a myriad of products, such as plastics, adhesives, paints, gasoline, fumigants, refrigerants, and dry cleaning fluids. Widespread and long-term use of VOCs and their ability to persist and migrate in groundwater raise questions about possible adverse effects on the environment, including drinking water quality. A long-term survey by the National Water-Quality Assessment Program of the United States Geological Survey provides the most comprehensive national analysis to date of the occurrence of VOCs in groundwater, based on results from sampling between 1985 and 2002. Among the major findings are that VOCs were detected in most aquifers throughout the Nation, and were not limited to a few specific aquifers or regions. VOCs were not detected, however, in many of the nearly 3,500 sampled wells; for example, about 80 percent had no detections above a threshold of 0.2 part per billion. The most frequently detected VOCs were chloroform, the solvents perchloroethene and trichloroethene, and the gasoline oxygenate methyl tert-butyl ether; 13 of the 55 compounds included in the assessment were not detected at all. A separate analysis of untreated groundwater samples from drinking water supply wells showed that VOCs were detected in domestic well samples (14 percent) and public well samples (26 percent). Less than 3 percent of samples of groundwater from domestic and public wells had concentrations greater than Federal drinking water standards. Includes 3 references, table.