Kleinheinz Gregory T, McDermott Colleen M, Leewis Mary-Cathrine, Englebert Erik
Department of Biology and Microbiology, University of Wisconsin-Oshkosh, 800 Algoma Boulevard, Oshkosh, WI 54901, USA.
Water Res. 2006 Dec;40(20):3831-7. doi: 10.1016/j.watres.2006.09.005. Epub 2006 Oct 17.
While the US Environmental Protection Agency's (EPA) Beaches Environmental Assessment and Coastal Health (BEACH) Act requires coastal and Great Lakes' states to implement plans for monitoring bacterial contamination of recreational beach water, exactly how this monitoring should occur has not been regulated. This study examined differences in concentration of Escherichia coli in water collected from different depths and from different horizontal locations across the beach. E. coli concentrations were significantly different (p<0.05), when water from different depths was compared. Sampling water at depths of 30, 60, and 120 cm resulted in significantly lower E. coli concentrations as depth increased. Had the State of Wisconsin chosen to collect beach water monitoring samples at a shallower or deeper depth, numbers of beach closures and the potential risk to public health would have changed substantially. These data imply that a revised and standardized protocol for monitoring beach water should be adopted by all states of a monitoring region to better compare microbial contamination of beaches and protect public health.
虽然美国环境保护局（EPA）的《海滩环境评估与沿海健康（BEACH）法案》要求沿海和五大湖州实施监测休闲海滩水域细菌污染的计划，但具体应如何进行这种监测尚未得到规范。本研究调查了从海滩不同深度和不同水平位置采集的水样中大肠杆菌浓度的差异。比较不同深度的水样时，大肠杆菌浓度存在显著差异（p<0.05）。在30厘米、60厘米和120厘米深度采集水样，结果显示随着深度增加，大肠杆菌浓度显著降低。如果威斯康星州选择在更浅或更深的深度采集海滩水质监测样本，海滩关闭的数量以及对公众健康的潜在风险将会发生显著变化。这些数据表明，监测区域的所有州都应采用修订后的标准化海滩水质监测方案，以便更好地比较海滩的微生物污染情况并保护公众健康。
