一些地下水源中的粪便污染可能是有害的 间歇性的或低的。几乎没有关于这个问题的数据 各种指标的比较表现 检测地下水中粪便污染的试验 来源测试了多次，而不是一次或一次 几次，在同等体积的基础上。提议的 美国环境保护署地下水 规则规定了使用大肠杆菌、肠球菌、， 或大肠杆菌噬菌体试验来检测污染，但 目前尚不清楚这些是否是最好的指标测试。 这项研究表明，检测粪便污染 有些地下水源很容易，但在另一些地方却很容易 说起来容易做起来难。除了利用地下水 脆弱性评估和油井卫生调查， 供水商需要对地下水进行采样 资源通常在一段较长的时间内使用 最可靠的监控工具。数据来自 这项研究虽然有限，但表明粪便污染 在一个已知污染的油井中，检测到的污染物最多 通常通过总大肠菌群指标测试，然后 通过粪便大肠菌群测试，然后E。 大肠杆菌和肠球菌检测。 此外，如果方法问题可以解决 要解决这个问题，应测试1-L体积，而不是 当前指定的100毫升容量。包括54篇参考文献。

Fecal pollution in some groundwater sources may be intermittent or low. Little data exist regarding the comparative performance of a large variety of indicator tests to detect fecal contamination in groundwater sources tested multiple times, rather than just once or a few times, and on an equal-volume basis. The proposed US Environmental Protection Agency Ground Water Rule specifies the use of either Escherichia coli, enterococci, or coliphage tests to detect contamination, but it is not clear if these are the best indicator tests to use. This study showed that detecting fecal pollution in some groundwater sources is easy, but in others it is easier said than done. In addition to using groundwater vulnerability assessments and well sanitary surveys, water purveyors need to sample their groundwater sources often, over an extended period of time, and use the most reliable monitoring tools available. Data from this study, although limited, show that fecal pollution in a well with known contamination was detected most often by the total coliform bacteria indicator test, followed by the fecal coliform bacteria test, then the E. coli and enterococci tests. Further, if method issues can be resolved, 1-L volumes should be tested rather than the currently specified 100-mL volumes. Includes 54 references.